Question

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tatMtiele Cheice 2.0peints.each Which of the fellowing structures is mest stable? How many stereaisomers does the molecule below have? 2) CH)HCtCH CHCH CH3 CH2 br OH e) 9 d) 8 c) 6 b)4 al 3 Which of the follewing molecules below are chiral? 3) HO Ho e) 1, 2 and 3 a) Only 1 d) 1 and 3 b) 1 and 3 c) 2 and 3 What is the relationship between the following two compounds? 4 сн, H- H H CH C a) Superimposable without bond rotation b) Enantiomers c) Diastereomers Conformational isomers e) Constitutional isomers What is the configuration of the following compound? 5. CH3 Ha C+-H H5C2 a) 25, 35 b) 2R, 3R c) 25, 3R d) 2R, 35 e) the molecule is achiral 6. Which of the following is/are optically inactive? a) A 50-50 mixture of R and S enantiomers b) A meso compound c) Every achiral compound Only (a) and (b) are correct d) (a), (b), and (c) are correct e) 1

Answer 1

1.. option d Because axial bonds are parallel to each other, substituents larger than hydrogen generally suffer greater steric crowding when they are oriented axial rather than equatoria.

2.. 4 stereoisomers are possible because it content 2 stereocenter i.e chiral center

3... option e 1 2 3 are all chiral

4.. Diastereomers are stereoisomers that are not mirror images of one another and are non-superimposable on one another. Stereoisomers with two or more stereocenters can be diastereomers.

5..