Role of hbr in chemistry Kim et al. Jan 11, 2023 · Fran studied for a BSc in Chemistry with Forensic Science, and since graduating taught A level Chemistry in the UK for over 11 years. Different solvents can show different reactions while it may be so that NBS all alone doesn't give any reaction until we have a free radical initiator. In the addition of HBr to ethylene, the partially positive hydrogen atom of HBr is attracted to the partially negative carbon atom of the ethylene double bond, facilitating the polar reaction. There are lots of ways to be a good mentor, but there are a few common principles that the best mentors share. Though isostructural, the disproportionation propensity of HBr and HCl salts was quite different. The low solubility of NBS in CCl4 (<0. 1016/J. For example, the reason that HBr, rather than Br 2 is widely used for gate etching processes is that HBr is easier to handle and more readily available in the industry. The fifth example gives a mixture of diastereomers, since addition of HBr across the alkene will not affect the initial (R) stereochemistry. Alex "Sandy" Pentland; by . evaluated Ar/HBr gas chemistry (Ar/HBr = 450/150sccm). But now, neuroscience offers some answers. Under free-radical conditions, however, it will result in free-radical anti-Markovnikov addition of HBr across the alkene. The reaction tends to occur such that the halogen ends up attached to the carbon of the alkene attached to the fewest hydrogen atoms, a phenomenon known as Markovnikov’s Rule. Reply HBr + CH 2 BrCl → HCl + CH 2 Br 2. n-Butyl bromide does not accept a proton Jun 1, 2016 · Request PDF | Role of surface-reaction layer in HBr/fluorocarbon-based plasma with nitrogen addition formed by high-aspect-ratio etching of polycrystalline silicon and SiO 2 stacks | The etching Nov 10, 2014 · 13. Her firm has developed a Addition of HBr, HCl, and HI to Alkenes. Please ask at your local bookshop or get it online here. Use of HBr in Plasma Etching HBr is used primarily to etch silicon. Br 2, BrCl, and HOBr have been hypothesized as bromine atom precursors, and there is evidence for chlorine atom precursors as well, but these species have not been measured directly. 005 M) is important for bromination in NBS. We considered that surface oxide was not etched by this gas chemistry. FUEL. Alcohols react with the strongly acidic hydrogen halides HCl, HBr, and HI, but they do not react with nonacidic NaCl, NaBr, or NaI. However, the origin of enhancements induced by HBr (hydrobromic acid) remains elusive. In this study, DFT-based microkinetic simulations were performed to reveal the reaction pathway and performance of propane dehydrogenation catalyzed by CeO2 in the Dec 13, 2017 · For an aspiring product manager (PM), there are three primary considerations when evaluating the role: core competencies, emotional intelligence (EQ), and company fit. This result indicates that the ERs of poly-Si and SiO 2 can be made almost equal when the HBr ratio May 16, 2021 · The unique role of NBS is to maintain the very low concentration of bromine by reacting with HBr. Feb 1, 2007 · The role of HBr and oxygen on the etch selectivity and the post-etch profile in a polysilicon/oxide etch using HBr/O 2 based high density plasma was studied. The etching behavior was systematically studied by varying different process parameters, i lack of complete reaction will leabe unreacted n-butyl alcohol, dehydration will give 1-butene, and competing rxn will give di-n-butyl ether Each of the above impurities protonates in concentrated H2SO4 to give the acid-soluble oxonium or carbonium ions and will be removed with the acid. com and co-author of two Mar 25, 2022 · The positive role of HBr is clearly evident from the microkinetic simulation. by . He has previously been a visiting professor at UC Riverside, California, USA and Hamburg University, Hamburg, Germany. Prabagar, S. Nov 7, 2021 · Your thought is correct, but the application not quite. Hydrobromic Acid | HBr or BrH | CID 260 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities HR's role has evolved to prioritize employee care and advocate for changes in outdated management policies to prevent burnout and stress. The HBr then catalyzes enolization of the acid bromide, and the resultant enol reacts with Br 2 in an α-substitution reaction to give an α-bromo acid bromide. This study revealed that the presence of HBr facilitated the C-H bond activation and altered the conventional reaction pathway. The positive role of HBr is clearly evident from the microkinetic simulation. The main emitted compounds are – in descending magnitude – water vapour, CO 2, SO 2, H 2 S, HCl, HF, H 2, CO and HBr (see Table 1), however many more components are being emitted in lower abundances. She studied for an MBA in Senior Leadership, and has held a number of roles during her time in Education, including Head of Chemistry, Head of Science and most recently as an Assistant Headteacher. 53 Similarly, when InP is etched in HBr chemistry Sep 9, 2017 · Highly efficient synthetic approaches toward organic halides are in high demand because of their crucial role in synthesis. Jan 27, 2021 · That is why the stationary mode of Si etching in HBr plasma is also provided by an ion-stimulated chemical reaction [10–12] and is characterized by significantly lower absolute rates of the process compared to fluorine chemistry. 40, respectively. com Hydrobromic Acid is a strong acid solution of hydrogen bromide in water with chemical formula HBr. The Role of Zero-Point Vibration and Reactant Attraction in Exothermic Bimolecular Reactions with Submerged Potential Barriers: Theoretical Studies of the R + HBr → RH + Br (R = CH 3, HO) Systems Published as part of The Journal of Physical Chemistry virtual special issue “125 Years of The Journal of Physical Chemistry”. Mostly, it is used in the production of inorganic bromides, especially the bromides of zinc, calcium, and sodium for use in photography, pharmaceuticals, industrial drying, textile finishing, engraving and lithography, and chemical synthesis fire retardants. Bruce and Sebastian U. Jan 21, 2024 · Addition to unsymmetrical alkenes. An unsymmetrical alkene is one like propene where the groups at either end of the carbon-carbon double bond are different. (a) and (b) indicate HBr mixing ratios of 0. Finally, oxygen at 5sccm was added to increase Dec 13, 2005 · A relatively small contribution (<50%) from gas-phase chemistry is found over the equator, where the BrONO 2 hydrolysis on cloud particles plays a significant role (>40%) . In the absence of light (hv) / peroxides then it will perform a Markovnikov addition of HBr to the alkene. The apparent activation barrier is reduced with the presence of HBr (Jan et al. Sep 30, 2024 · The electrophilic addition of HBr to ethylene is only one example of a polar process; there are many others that we’ll study in depth in later chapters. Mar 5, 2014 · Highly selective and precisely controlled aluminum etching was investigated by using plasma with a new Ar/HBr/CH 3 F/O 2 gas chemistry. The current In a typical undergraduate organic chemistry course, these are going to be S N 1, E1, and the electrophilic addition reactions to alkenes such as those of hydrohalic acids (hydrogen halides), and acid-catalyzed hydration. The TOFs of both propane conversion and propene formation increased after the introduction of HBr, which correlates The role of DMSO as oxidant in the transformation is clarified, and a tentative reaction pathway is proposed. Sep 22, 2020 · Self-reactions observed in the HBr+ (DBr+) + HBr system have been investigated using a guided ion-beam experiment under single-collision conditions. A version of this article appeared in the March–April 2017 issue of Harvard Business Review. Outlining the electrophilic addition of alkenes with HBr to form bromoalkanes. Under the etching condition, we did not see any etching of aluminum. Answer to From the HBR Case: The CEO of Athenahealth on the role of anger in Nov 5, 2014 · $\begingroup$ Also note that ethene is not usually reacted with $\ce{HBr(aq)}$. We can synthesise HBr by the distillation of sodium bromide or potassium bromide solution with phosphoric acid. Mar 9, 2023 · Our previous work identified the role of HBr in PDH for pristine CeO 2 catalysts. Mukti Khaire (mkhaire@hbs. Hydrogen bromide is utilized to prepare various chemicals and drugs, as a solvent. Electrophilic addition of hydrogen halides to alkenes and alkynes provides a uniformed approach toward branched alkyl and alkenyl halides, and is a model reaction in most textbooks of organic chemistry. One critical goal is achieving both a vertical profile and high throughput for multiple-stack etching. With the introduction of oxygen in the HBr plasma, high etching rate, smooth surface morphology, and vertical sidewall profile were achieved due to sidewall passivation and enhancement of ion-assisted chemical etching. HBr/O 2-based polysilicon etch process used in this study seems to be highly selective to the underlying oxide and produce a dielectric fill-friendly post-etch profile depending on the flow rates of HBr and oxygen. , 2022). HBr modifies both the plasma chem-istry and the surface chemistry of the process which, in turn, changes etch performance. But regardless of the details of individual reactions, all polar reactions take place between an electron-poor site and an electron-rich site and involve the donation of an electron pair from Jul 29, 2011 · Sodium Amide (Sodamide, NaNH 2), A Strong Base For The Deprotonation Of Terminal Alkynes (Among Other Uses). 4). Field of study. The regiochemistry of regioselectivity of a reaction is the preferential formation of one out of two or more possible regioisomers. See full list on masterorganicchemistry. Photoinitiated polymerization of acrylamide has been reported to prepare surface bound graft copolymers [225]. Sahoo, Org. While the conventional process consists of multiple steps for each stacked layer, in this study, HBr/fluorocarbon-based gas chemistry was investigated to Chemistry; Chemistry questions and answers; A student performs the reaction of 2-ethyl-1,3-pentadiene with HBr at –55∘∘C and obtains the following mixture of products: 78% compound A and 22% compound B. Hydrogen peroxide was first identified and isolated by Louis Jacques Thenard, a French chemist, in 1818 and was described as “oxygenated water” [12]. 2 VCl 4 + 8 HBr → 2 VBr 3 + 8 HCl + Br 2. The etching yields were found to scale linearly with (Eion − Eth), where the threshold energies, Eth, are 10 eV for both Cl2 and HBr. The reaction happens under the same conditions as with a symmetrical alkene, but there is a complication because the hydrogen and the bromine can add in two different ways. 67 and (b) 0. Historically CSOs have acted like stealth PR executives—their primary task was to tell an . By adding CH 3F at 5sccm, aluminum was etched; however, SiO 2 was also etched at a similar rate to aluminum. But regardless of the details of individual reactions, all polar reactions take place between an electron-poor site and an electron-rich site and involve the donation of an electron pair from In 1999 he moved to Alzahra University of Tehran, Iran as professor of chemistry where he is still working. But HBr in the presence of a peroxide shows a behavior opposite to the Markovnikov's rule, thereby termed as The Anti-Markovnikov's Rule. − Adding oxygen to HBr reduces the rate of silicon etching but increases the anisotropy of the process [10, 12]. Oct 29, 2004 · When InP is etched in methane, chemistry, its primary role is to aid in the removal of group III species (In) by the formation of volatile species of the form 36 52 53 Removal of In species is crucial to achieve high etch rates while at the same time, retaining a reasonably smooth morphology. HBr is also very Feb 1, 2007 · The role of HBr and oxygen on the etch selectivity and the post-etch profile in a polysilicon/oxide etch using HBr/O 2 based high density plasma was studied. Dalian University Jun 1, 2016 · DOI: 10. 054 Corpus ID: 101964732; Experimental study on the mechanism of mercury removal with Fe2O3 in the presence of halogens: Role of HCl and HBr @article{Liu2016ExperimentalSO, title={Experimental study on the mechanism of mercury removal with Fe2O3 in the presence of halogens: Role of HCl and HBr}, author={Ting-yu Liu and Chang-Gi Man and Xin Guo and Chuguang Zheng Mar 10, 2023 · Our previous work identified the role of HBr in PDH for pristine CeO 2 catalysts. Jan 21, 2024 · Hydrogen halides (hydrogen chloride, hydrogen bromide and the rest) usually react with alkenes using an electrophilic addition mechanism. Dipole-dipole interactions play a crucial role in the stability and properties of many organic and biological molecules, such as proteins and nucleic acids. Reprint: R0901H Today’s business leaders increasingly rely on coaches for help in understanding how to act in a demanding and volatile world. Feb 19, 2023 · Both HBR and Ba(OH)2 play important roles in their respective fields and can contribute to the success and growth of businesses and industries. A version of this article appeared in the April 2012 issue of Harvard Business Review. Melba J. Army during World War I to try to predict which soldiers would suffer from “shell shock,” personality testing today is a roughly $500 million industry, with an annual Physical Chemistry; September 1997 - June 2001. We could show a reaction between the dimer and THF forming the THF-BH3 complex, however, the formula of the monomer allows to better illustrate a mechanism for the Lewis acid-base reaction. HBr + C 3 H 6 → C 3 H 7 Br. In short, carbonyl compounds play a central role in atmospheric chemistry close to the tropopause, and this is directly relevant to issues such as the assessment of the impact of air traffic, and ozone depletion. Duncan is the president of The Duncan Group and the author of The New Executive Assistant. Nate Bennett is a professor with the Robinson College of Business at Georgia State University. Through Aug 2, 2013 · Such functionalization has profound effects on surface wettability and chemistry. Just as any other great relationship, a mentorship needs chemistry to reach its full potential. Cl2/HBr chemistry at different ion energies. Apr 12, 2022 · The positive role of HBr is clearly evident from the microkinetic simulation. Hydrogen may contribute to mitigating oxidation of the Feb 27, 2017 · Summary. Institution of Coal Chemistry, Chinese Academy of Sciences; An-Hui Lu. It is an effective and selective hydrobrominating reagent for alkynes and alkenes. Managers have tried various strategies and perks to boost employee engagement—all with little impact on long-term retention and performance. Used as a chemical intermediate, the major uses for elemental bromine are as a sanitizing or disinfecting agent. The TOFs of both propane conversion and propene formation increased after the introduction of HBr, which correlates with the apparent decreased activation energy. Dec 12, 2012 · Abstract In this work, we explore the effect halogen bonds and hydrogen bonds have on the activation of the chemical bonds modified in the course of the Br2 + (H2O)n → HOBr + HBr reaction and the effect the number of water molecules present in the cluster has on the barrier and the stability of the products formed. 1116/1. 3484249 Corpus ID: 137340383; Photoresist modifications by plasma vacuum ultraviolet radiation: The role of polymer structure and plasma chemistry @article{Weilnboeck2010PhotoresistMB, title={Photoresist modifications by plasma vacuum ultraviolet radiation: The role of polymer structure and plasma chemistry}, author={F. Both plasma diagnostics and modeling tools were applied to compare effects of gas mixing ratios on steady-state plasma parameters and densities of active species as well as to determine key processes in respect to Cl and Br atom kinetics. B. HBr Synthesis. The reaction channels observed are proton transfer/hydrogen abstraction (PT/HA) in the case of HBr+ and deuteron transfer/hydrogen abstraction (DT/HA) and charge transfer (CT) in the case of DBr+. If you aren't confident about energy cycles and the logic behind them (Hess's Law), you might want to explore the energetics section of Chemguide, or my chemistry calculations book. You are correct, the resonance structures vary from secondary and tertiary carbocation, because the proton will attack the double bond at the end of the molecule to form the more stable carbocation, but: The more substituted alkene will be considerably more stable. 4. Chemistry is a harmonious or effective interaction between people working together. Heilongjiang University. Lett. In the third example Markovnikov’s rule gives no clear preference, so a mixture is obtained. When dissolved in these solvents, the role of Lewis base is taken by them as they are stronger electron donors. Fig. 85% HBr by weight at room temperature. The process begins by reaction of the carboxylic acid with PBr 3 to form an acid bromide plus HBr (Section 21. edu) is an assistant professor at Harvard Business School. May 24, 2016 · The etching of polycrystalline silicon (poly-Si)/SiO2 stacks by using VHF plasma was studied for three-dimensional NAND fabrication. KBr + H 2 SO 4 → KHSO 4 + HBr Mar 2, 2010 · Fran studied for a BSc in Chemistry with Forensic Science, and since graduating taught A level Chemistry in the UK for over 11 years. Army during World War I to try to predict which soldiers would suffer from “shell shock,” personality testing today is a roughly $500 million industry, with an annual Jan 21, 2022 · Summary. A colorless gas, it dissolves in water, forming hydrobromic acid, which is saturated at 68. HBr and fluorocarbon gas mixing ratio. The best PMs have mastered Jun 15, 2009 · Volcanic emissions played a key role in producing the early atmosphere on Earth. Subsequent Jul 31, 2017 · HBr–DMPU (1,3-dimethyl-3,4,5,6-tetrahydro-2-pyrimidinone) is a room-temperature-stable complex with HBr. His research interests focus on heterocyclic chemistry, catalysis, organic methodology and green synthetic organic Revealing role of HBr in propane dehydrogenation on CeO2(111) from DFT based microkinetic simulation. These findings emphasize Dec 5, 2016 · On the other hand, formulations containing HCl or HBr salt disproportionated. Describe the role of HBr in the preparation and properties of halogen-containing compounds. Feb 8, 2013 · When hydrohalic acids (HCl, HBr, HI) are added to alkenes, addition reactions can occur, resulting in formation of a C-H and C-halogen bond and breakage of a C-C pi bond. Apr 1, 2021 · The comparative study of Cl 2 + O 2 and HBr + O 2 plasma chemistries in respect to Si reactive-ion etching process was carried out. Hydrobromic acid, HBr, is a valuable reagent in the preparation of a variety of bromine-containing organic and inorganic compounds. Improved representation of HOBr heterogeneous chemistry and its pH dependence in our simulation leads to less efficient recycling and mobilization Feb 1, 2019 · Features of plasma chemistry as well as peculiarities of etching mechanisms for Si and SiO 2 in the HBr + Cl 2 + O 2 gas mixture with variable HBr/O 2 mixing ratio were investigated using a N-Bromosuccinimide (NBS). N-Bromosuccinimide (NBS) is a brominating and oxidizing agent that is used as source for bromine in radical reactions (for example: allylic brominations) and various electrophilic additions. The reaction is acid catalyzed. S. It is a hydrogen halide consisting of hydrogen and bromine. In this case, the electron-rich (nucleophilic) part of ethene (the $\pi$ bond) reacts with the electron poor (electrophilic) part of $\ce{HBr}$ (the hydrogen atom). The sticking Few reagents such as Hydrogen Halides (HX), Sulfuric Acid H2SO4, Alcohols (R-OH), Water (H2O) follow Markovnikov's Rule for the addition across the double bond of an alkene. Ethene is usually reacted with $\ce{HBr(g)}$, in which case the acid is not ionized. 2016. Prasad, A. to play relatively minor roles in gate etching processes. Using ab initio MP2 methods, we have analyzed the local electrodonating and First used by the U. Reaction with Inorganic Compound. Visit BYJU'S to understand the properties, structure and its uses. What we need to do is calculate the enthalpy change shown by the green arrow in the diagram for each of the halogens so that we can make a comparison. The mechanism for the reaction and carbocation stability giving major and mino The role of the chief sustainability officer is undergoing a rapid and dramatic transformation. May 11, 2018 · In the overall process, the catalytic surface plays an essential role as it enables a continuous recovery of Br • and Br 2 from HBr, suppressing the termination steps. Engelmann The dynamics of the reactions CH3 + HBr → CH4 + Br and HO + HBr → H2O + Br have been studied using the quasiclassical trajectory method to explore the interplay of the vibrational excitation of the breaking bond and the potential energy surface characterized by a prereaction van der Waals well and a submerged barrier to reaction. We present an updated mechanism for tropospheric halogen (Cl + Br + I) chemistry in the GEOS-Chem global atmospheric chemical transport model and apply it to investigate halogen radical cycling and implications for tropospheric oxidants. (Color online) Schematic of cross-sectional etching profile. heterogeneous chemistry is neglected, the ozone depletion in the polar regions is primarily affected by the seasonal variation in the mean meridional circulation of the atmosphere. However, in the presence of organic peroxides, hydrogen bromide adds by a different mechanism. HBr+/DBr+ ions have been formed with rotational A version of this article appeared in the May 2006 issue of Harvard Business Review. Jan 19, 2001 · Bromine atoms are believed to play a central role in the depletion of surface-level ozone in the Arctic at polar sunrise. The role of the hydroxide ion in an elimination reaction Hydroxide ions have a very strong tendency to combine with hydrogen ions to make water - in other words, the OH- ion is a very strong base. 01. Reaction of HBr Hydrobromic acid, with the chemical formula HBr, is a strong acid that is widely used in various industries. , 2016 , 18 , 3066-3069. 40. The HCl salt highlighted the important role that volatility of the counterion plays in the physical stability of the formulations. K. The electrophilic addition of HBr to ethylene is only one example of a polar process; there are many others that we’ll study in depth in later chapters. HBr reacts with VCl 4 via a redox reaction to form the VBr 3 complex. Biomolecules such as gelatin could be covalently attached by amide chemistry and functionalized films showed improved cytocompatibility. The reaction rate has a first order dependence on C 3 H 8 and zero order dependence on HBr. Used in the preparation of numerous organic compounds. The attraction between the reactants is favorable for the Notes: The first two examples show a simple addition of HBr to give the Markovnikov product. A ketone oxidation, employing catalytic HBr and DMSO, followed by imidazole condensation with aldehydes provides 2,4(5)-disubstituted imidazoles in good May 1, 2019 · Features of plasma chemistry as well as peculiarities of etching mechanisms for Si and SiO 2 in the HBr + Cl 2 + O 2 gas mixture with variable HBr/O 2 mixing ratio were investigated using a combination of experimental and theoretical approaches. Typically, it is used alongside Cl 2 and O 2. Uses of Hydrobromic Acid – HBr. Most critically, adding HBr makes the profile more anisotropic than when using Cl 2 alone. Revealing role of HBr in propane dehydrogenation on CeO2(111) from DFT based microkinetic simulation. One principle is putting the relationship before the mentorship. A version of this article appeared in the May 2011 issue of Harvard Business Review. May 24, 2016 · The total gas flow rate was set to be constant at 300 ml/min. “A Textbook of Physical Chemistry – Volume 1 by Mandeep Dalal” is now available globally; including India, America and most of the European continent. Poly-Si ER increased when the HBr ratio was high, and SiO 2 ER increased when the fluorocarbon ratio was high because fluorocarbon radicals might have impeded the etching of poly-Si. The current First used by the U. Holes were fabricated in poly-Si=SiO 2 stacks when the HBr mixing ratios were (a) 0. Generally, BrONO 2 hydrolysis on cloud particles is important as it contributes 20–40% of the ozone loss in most of the troposphere, while BrONO 2 hydrolysis on background CHEMISTRY 9701/22 Paper 2 AS Level State the role of nitrogen dioxide A t 700 K HBr is approximately 10% decomposed but hydrogen iodide, H I, is approximately Dec 25, 2021 · Hydrogen peroxide, the simplest form of the peroxides [10], is a strong oxidizer and a weak acid in aqueous solution [11]. MD. Sep 7, 2010 · DOI: 10. ACL Poly-Si SiO 2 (a) (b) Si sub. Mar 30, 2017 · Deloitte national managing director Kim Christfort talks about the different personality styles in an organization and the challenges of bringing them together. Nayak, R. Sep 21, 2021 · Abstract. $\endgroup$ Apr 12, 2022 · HBr, as a soft oxidant, has been demonstrated to have a good balance between stability and selectivity in catalytic propane dehydrogenation. It was studied extensively by Morris Kharash was also known as the Kharasch effect Science; Chemistry; Chemistry questions and answers; What is the role of Potassium Bromate (KBrO3) and HBr in the reaction bromination of acetanilide? Aug 1, 2000 · The reactions of carbonyls with Br and Cl are also major sources of HBr and HCl. In a blatant plug for the Reagent Guide, each Friday I profile a different reagent that is commonly encountered in Org 1/ Org 2. She is the primary author of the Business Chemistry Blog on Deloitte. These confidants and advisers can earn up to $3,500 Question: Identify the role of each reactant in the reaction +HBr A B C D View Available Hint(s) C= base ;D= base C= acid ;D= acid A= base ;B= acid A= acid B= base Jan 23, 2023 · The order of reactivity of the hydrogen halides is HI > HBr > HCl (HF is generally unreactive). Generally, an aluminum surface is oxidized, leading to difficulties in the precise control of nm/min-level aluminum etching with a high selectivity to SiO 2 of more than 10. Feb 1, 2007 · Semantic Scholar extracted view of "A study of the role of HBr and oxygen on the etch selectivity and the post-etch profile in a polysilicon/oxide etch using HBr/O2 based high density plasma for advanced DRAMs" by D. The chemistry of high-performing groups is no longer a mystery. Weilnboeck and Robert L. The etching yields at different neutral-to-ion flux ratio were measured and the sticking coefficients are derived for reactive neutrals for Cl2 and HBr. 67 and 0. Used as a reagent and as a catalyst in a variety of organic reactions. The authors gratefully acknowledge the participants in the colloquium “Creativity, Entrepreneurship, and Inductively coupled plasma etching of InP using HBr/O 2 -based chemistry is reported. Hydrogen bromide is the inorganic compound with the formula HBr. Alison Beard is an executive editor at Harvard Business Review and co-host of the HBR IdeaCast podcast. jdtnxyp zpsm evaw isylxodf rggzrl rjl webme zbyge kxa gnyeh