For each of the following pairs, please state whether they represent a pair of enantiomers, a pair of diastereomers, or the same compound: H Br (a) CH3CH2- CH3 and CH3CH2 Br CH3 CH3 CH2CH3 (b) and CH3O CH2CH3 H;C CH2OH CH2OH CH30
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Q: The answer is D. Could you explain the answer please?
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Q: How many degrees of unsaturation does a compound of molecular formula C7H12Br2N20 possess? 3 2.
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- What is the ee for each of the following mixtures of enantiomers A and B?a. 95% A and 5% Bb. 85% A and 15% BGiventhefollowingsetofreactionsandtheirenthalpies,drawtheBorn-Habercyclefortheformationof LiCl(s)anddeterminethelatticeenergyforLiCl.Reactions:H (in kJ)(1)Li(s)Li(g);Hs= 161;(2) Li(g)Li+(g)+e–;IE= 520;(3) ½Cl2(g)Cl(g);½BE =121.5;(4)Cl(g)+ e–Cl–(g);EA= –349;(5)Li+(g)+ Cl–(g)LiCl(s);UL= ?(UL= latticeenergy)(6) Li(s)+ ½ Cl2(g)LiCl(s);Hof=–408.6._______________________________________________________________________________What is the stereochemical configuration of the enantiomer of (2S, 4R)-2, 4-octanediol? (A diol is a compound with two —OH groups.)
- Allenes are compounds with adjacent carbon-carbon double bonds. Many allenes are chiral, even though they don’t contain chirality centers. Mycomycin, for example, a naturally occurring antibiotic isolated from the bacterium Nocardia acidophilus, is chiral and has [α]D = -130. Explain why mycomycin is chiral.3b) (i) Using Fischer projection, draw all the stereoisomers of 3-chloro-2-hydroxypentanoic acid. ii) Assign the chiral centre(s) with R/S configurations in part (b)(i). Indicate which areenantiomers, diastereomers and meso compounds (if any).The relative configurations of the stereoisomers of tartaric acid were established by the following syntheses:(1) d@(+)@glyceraldehyde T diastereomers A and B (separated)(2) Hydrolysis of A and B using aqueous Ba(OH)2 gave C and D, respectively.(3) HNO3 oxidation of C and D gave (-)@tartaric acid and meso-tartaric acid, respectively.(a) You know the absolute configuration of d-(+)-glyceraldehyde. Use Fischer projections to show the absolute configurations of products A, B, C, and D.(b) Show the absolute configurations of the three stereoisomers of tartaric acid: (+)-tartaric acid, (-)-tartaric acid, andmeso-tartaric acid.
- The chiral catalyst (R)-BINAP-Ru is used to hydrogenate alkenes to give alkanes . The products are produced with high enantiomeric excess. An example is the formation of (S)-naproxen, a pain reliever. Q.How can one enantiomer of naproxen be formed in such high yield?a. Idêntify thè cònfigûràtiòn of the dôublè bônd. b. Rèdraw the strùctùre and lábel the chîrál cèntérs usîng an ásterisk. c. Rèdràw the strùctüre with ALL thê chirál cèntèrs in S Cònfigûratîon. d. Dráw the ènantiômer of the strûcture dräwn in letter C. e. identify the number of diastereomers that this compound can have.How many stereocentres are present in 2‑bromoethan‑1‑ol?
- (S)-carvone is an optically active compound with a specific rotation of +61.1°. A solution of carvone stereoisomers has an observed specific rotation of 25.0°. Could someone help me Calculate the percent enantiomeric excess (%ee) of this mixture? I tried it but I keep getting the wrong answer.Provide products for the following reactions. Label them as chiral, achiral, meso, dl, cis/trans, and stereocenters as R,S.