Chemistry Weekly Newsletter - Monday, May 30, 2016

Have you found help on Chemistry? Take just two minutes to sign up now, and you'll be ready to give back when you can. Sign up for Chemistry Top new questions this week: Can you have a meta stereocenter? Imagine a compound such as 1,3-dibromo-1,2,3-trichloropropane. Since the first and third carbons are attached to four different groups, they are both chiral centers. Assuming that both of these ... organic-chemistry nomenclature stereochemistry   asked by Benzene 10 votes answered by ringo 7 votes How to separate and analyse a sample of cations of alkaline and earth alkaline cations and ammonium? I am teaching a section of qualitative analysis and I am trying to get a better grasp on the assignments the students are doing. These are the cations they may be presented with and must identify: ... inorganic-chemistry analytical-chemistry   asked by Dissenter 8 votes answered by Martin - マーチン 6 votes Why is 2-methyl-2,3-pentadiene achiral? 2-Methyl-2,3-pentadiene is achiral. Why? Centre of symmetry Plane of symmetry C2 axis of symmetry Centre and Plane of symmetry. I've drawn the structure: So far I've ... organic-chemistry homework symmetry   asked by Keren Naomi 8 votes answered by ninth_account 12 votes What is resonance? Are resonance structures real? My teacher told me about resonance and explained it as different structures which are flipping back and forth and that we only observe a sort of average structure. How does this work? Why do the ... resonance valence-bond-theory   asked by bon 8 votes answered by bon 10 votes Why are protic acids not used for the formation of thioacetals? The standard procedure for protecting a carbonyl group as an acetal uses dry acid, such as $\ce{TsOH}$, but when forming a thioacetal, the Lewis acid $\ce{BF3}$ seems to be the catalyst of choice. For ... organic-chemistry synthesis carbonyl-compounds   asked by orthocresol 7 votes Why doesn't the bidentate ligand form dative bonding three times? I was looking at this question where it asked you to work out the final complex formed when an excess of 1,2-diaminoethane is added to and aqueous solution of copper (II) sulphate. So the equation I ... coordination-compounds transition-metals   asked by Viv 6 votes answered by Jan 4 votes Is these a pair of diastereomer or identical compound? I attempted on this question (e) and found out that they are diastereomers, but the answer from the book is that they are identical. I worked out the configuration at each of the centres for the ... organic-chemistry stereochemistry erratum   asked by Theresa 6 votes answered by Chao Song 5 votes Greatest hits from previous weeks: Chemistry behind Gale's Coffee Maker in Breaking Bad Is there a scientific basis for the coffee making equipment which Gale describes in Breaking Bad? He talks about maintaining the right conditions for bringing out the coffee flavor without degrading ... organic-chemistry everyday-chemistry experimental-chemistry home-experiment chemistry-in-fiction   asked by Aswath 15 votes answered by G M 12 votes How to calculate melting/boiling points at different pressures I know water boils at below room temperature in a vacuum, and want to know if there's an equation to calculate the melting or boiling points of elements or compounds at a given pressure. How would I ... melting-point vapor-pressure   asked by baharini 10 votes answered by thomij 10 votes Can you answer these? Reactor mass balance with solid feed and overflow I am modeling a lime slaker which is basically a stirred tank reactor with two separate feeds: 1. CaO feed screw (powder) 2. H2O binary valve (liquid) These react according to the reaction: ... applied-chemistry   asked by jannekem 3 votes Doubt about Rutherford's experiment In Rutherford's experiment to show the existence of nucleus in an atom, the alpha-particles were exposed on the surface of certain metal i.e. gold. He observed that more than 99% of these particles ... electrons atoms   asked by Abhinandan Malhotra Ambedkar. 2 votes Is this equation of state original? I created this equation of state as a personal undergraduate summer project (here is the link) seven years ago: $$\frac{PV}{n\mathcal RT}-1\propto \left(\frac{n\mathcal ... physical-chemistry gas-laws equation-of-state   asked by KingChem 3 votes

Subscribe to more Stack Exchange newsletters Unsubscribe from this newsletter or change your email preferences by visiting your subscriptions page on stackexchange.com. Questions? Comments? Let us know on our feedback site. If you no longer want to receive mail from Stack Exchange, unsubscribe from all stackexchange.com emails. Stack Exchange, Inc. 110 William St, 28th Floor, NY NY 10038 <3