1. What is the expected major product from the reaction of (4R,5R,6S)-6-chloro-7-cycloheptyl-4,5-epoxy-5-ethyl-2,6-dimethylheptane-1-ol with 48% aqueous hydrobromic acid?
Select one:
a. (4R,5R,6R)-5-bromo-6-chloro-7-cycloheptyl-5-ethyl-2,6-dimethylheptane-1,4-diol
b. (4R,5R,6S)-4-bromo-6-chloro-7-cycloheptyl-5-ethyl-5-hydroxy-2,6-dimethylheptane1-ol
c. (4R,5R,6R)-4-bromo-6-chloro-7-cycloheptyl-5-ethyl-2,6-dimethylheptane-1,5-diol
d. (4R,5S,6S)-5-bromo-6chloro-7-cycloheptyl-5-ethyl-2,6-dimethylheptane-1,4-diol
e. (4S,5S,6R)-5-bromo-6-chloro-7-cycloheptyl-5-ethyl-4-hydroxy-2,6-dimethylheptane-1-ol
2. Which of the following sets of compounds contain a pair of diastereomers?
(i) (S)-2-tert-butyl-2-methylcyclobutanone & (R)-2-tert-butyl-2-methylcyclobutanone
(ii) salt of (R)-phenylethylammonium with (2S,3S)-2,3-dihydroxybutanedioic acid & salt of (S)-phenylethylammonium with (2S,3S)-2,3-dihydroxybutanedioic acid
(iii) (S)-1-cyano-2-propanol & (R)-1-cyano-2-propanol
(iv) (S)-methylphenyl-n-propylphosphine & (R)-methylphenyl-n-propylphosphine
(v) (2S,3R)-2,3-butanediol & (2R,3S)-2,3-butanediol
Select one:
a. all the above
b. (iv) only
c. (i) and (v)
d. (i) only
e. (ii) only
3. Which of the following sets of compounds are enantiomers?
(i) (1R,4S)-1,4-cyclohexanediol & (1S,4S)-1,4-cyclohexanediol
(ii) (1R,2R)-cyclopentane-1,2-diol & (1R,2S)-cyclopentane-1,2-diol
(iii) (3S,4R)-3,4-dibromo-3,4-dimethylhexane & (3R,4R)-3,4-dibromo-3,4-dimethylhexane
(iv) (S)-2-chlorocylopropanone & (R)-2-chlorocylopropanone
(v) (R)-a-methylbenzylamine & (S)-a-methylbenzylamine
Select one:
a. (i) only
b. (i) and (iii) only
c. (iii) and (iv)
d. (iv) only
e. (iv) and (v)
4. Which of the following are meso compounds?
(i) (1R,2S,3S,4R)-1,2-dibromo-3,4-dimethylcyclobutane
(ii) (1R,3S)-1,3-cyclohexanediol
(iii) (2R,3S)-2,3-dibromobutanedioic acid
(iv) (3R,4S)-3,4-dibromo-3,4-dimethylhexane
(v) (2R,3S,4S)-2,3,4-tribromopentane
Select one:
a. (iv) only
b. (i) and (ii) only
c. all the above
d. none of the above
e. (iii) and (v) only
5. Which of the following compounds DO NOT contain a plane of symmetry?
(i) trans-3,4-diethylpyrrolidine
(ii) trans-2-butene
(iii) cis-1,2-cyclobutanediol
(iv) 4-chlorocyclohexanol
(v) cis-1,2-dibromocyclopentane
Select one:
a. (i) only
b. (ii) only
c. (i) and (iii) only
d. all the above
e. none of the above
6. What is the expected major product arising from the reaction of (2R,3E)-4-phenyl-3-butene-2-ol with sodium dichromate and sulfuric acid?
Select one:
a. (2R)-4-phenyl-2-butanol
b. (3Z)-4-phenyl-2-butanone
c. 4-phenyl-2-butanone
d. 4-phenyl-2-butanol
e. (3E)-4-phenyl-3-buten-2-one
7. What is the expected major organic product expected from reaction of cyclopentene with cold potassium permanganate under basic conditions?
Select one:
a. a pair of diastereomeric 1,2-cyclopentanediols
b. (1R,2R)-1,2-cyclopentanediol
c. meso-1,2-cyclopentanediol
d. (1S,2S)-1,2-cyclopentanediol
e. no reaction
Answers
Meso Compounds
Explanation:
A meso compound is a non-optically participating part of a collection of stereoisomers, at shortest two of which are optically determined. This indicates that notwithstanding including two or more stereogenic centres, the particle is not chiral. A meso composite is "superposable" on its reflector vision (not to be confounded with superimposable, as any two things can be superimposed above one different unheeding of whether they are alike). Two things can be superposed if all phases of the things match and it does not create learning when examined with a polarimeter.
To learn more:
i)Difference between racemic mixture and meso compound - Brainly.in
https://brainly.in/question/14351964
ii)Why meso compound are optically inactive?? - Brainly.in
https://brainly.in/question/6970773