1. MCPBA 2. H, H20 CH(CH3)2 H3CH2C- OH H- OH CH2CH3 CH(CH3)2 CH(CH3)2 CH(CH3)2 HECH,C- OH...
15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV a) I b) II c) III d) IV e) V 15) The most stable conformation of 3-bromo-2-methylpentane, viewed through the C-2-C-3 bond (i.e., C-2 in the front, C-3 in the back) Br CH3 CH 3 CH3 H2CH H3C CH(CH3)2 CH3 CH3 CH3 CH2CH3 H2CH3 IV...
4. Which pall or suructures are enantiomers? COOH OH CH3 Ноосон нон CH2CH3 Br CH CI WYCH CH3 ÇH2CH3 CH3 HO CH3 HOCH CHz a) I, II b) II, III c) I, III d) I, II, III 5. Which are meso compounds? OH H ANH OH - H TOH a) I and II b) II and III c) I and III d) III and IV
g) Which structure is Z-2-bromo-3-methyl-2-pentene? CH3 H3C CH2CH3 H C=C CH-CH,CH, CH3 CH3 Вісн. C=C CH3 Br н Br | BÁ CHẠCH, C=C CH, CHỊCH, 10) Which compounds contain stereocenters? D) 1-chloropentane II) 2-chloropentane III) 3-chloropentane IV) 1,2-dichloropentane 11) Aspartame is an artificial, non-saccharide sweetener. It is made from two amino acids phenylalanine (methyl ester) and aspartic acid. Both aminoacids have one stercocenter. Both stereocenters have S-stereoconfiguration. Which of the two structures is aspartame? H2N-C-C-N-C-0-0 CH2 CH2 c=0 HO HO...
1) Which of the following is a secondary alcohol? A) CH3CH2-CH-CH2CH2CH3 CH2CH2CH2OH он - CH₂ CH3 CH2-CH-CH3 он CH2CH3 CH2CH2CH3 CH3CH2-C-CH2CH3 OH 2) The substance that precipitates in a positive Benedict test is: A) Cuo B) Cu2o C) Ag D) none of these 3) Galactose is called a(n): A) ketohexose B) aldopentose C) aldohexose D) ketopentose 4) Identify all the disaccharides from the following list: i) Lactose ii) Glucose iii) Ribose iv) Maltose A) iii B) iii + iv C)i...
6. CH3 Br CCI 7. CH3 Br CH, OH 8. CHE 1. MCPBA 2. CH,OH, H* 9. CH Oso,,H,O, 10. Na, NH 0
Which is the product of the following reaction? OH Н3РО4 RCOH CH3 -OH heat H OH H PH HOH -O-CH3 -O-CH3 н. II - III IV IV II I III
(45 pts) What is the expected major product of the following.reaction sequence? 1 NacEL HOEt heat 2 HgrCAc) CH,OH 3 NaliH NaCH OCH3 OHH HyCO OCH3 IV- II II . (4.5 pts)Which is the correct sequence of reaction steps necessary to complete the following transformation? Br OH + enantiomer OH I. MCPBA II. NaOCH,CH. CH,CH,OH T. H,O" or -OH IV. 1) OsO, then 2) NaHSOH,O I then IV B) I then II then III C) II then I then III...
CH=CHCH.CH H2 -> ? Pd/C I. CECCH2CH3 IV. CH=CHCH2CH3 II. CH=CHCH2CH CH CH, CH2CH3 V. CH=CHCH2CH3 III. AT B) II C) III D) IV E) V
Identify and assign a pair of geometrical isomers. H н H H CH,CH, CHCH, нсн,с CH2CH3 H H H H3CH2C (b) (c) H2CH2C H H3CH2C CH2CH3 H CH2CH3 H,CHÚC H H2CH2C H H CH,CH, (d) (1) Z isomer is E isomer is
For the following dihydroxylation reaction which of the following statements is correct regarding the expected products? 1. MCPBA 2. H, H2O CH(CH3)2 H3CH2CH н-он CH2CH3 CH(CH3)2 H3CH2CtoH нонн CH2CH3 CH(CH3)2 HoCH2CH3 нонн CH2CH3 CH(CH3)2 Ho+CH2CH3 H -OH CH2CH3 O Equal amounts of I and IV produced Equal amounts of I and III produced Equal amounts of II and III produced O Equal amounts of I and II produced Equal amounts of III and IV produced