Chemistry - STEREO ISOMERISM Question with Solution | TestHub
ChemistrySTEREO ISOMERISMCALCULATION OF TOTAL STEREOISOMERSMedium2 minQB
ChemistryMediumsingle choice
(i) Total stereoisomers of 2,3-di-chlorobutane are (a).
(ii) CH3-CH=CH-CH=CH-CHCl-CH3
Total number of stereocentre in given compound are (b). Value of a + b will be.
Options:
Answer:
A
Solution:
Ans. (A) a + b = 8.
Sol. (i) 2,3-Dichlorobutane has two equivalent stereocentres: (2R,3R) and (2S,3S) form an enantiomeric pair and (2R,3S) is meso, so a = 3.
(ii) In CH3-CH=CH-CH=CH-CH(Cl)-CH3 the carbinyl carbon is a stereocentre (1) and each of the four stereogenic alkene carbons is also counted (4), so b = 5. Hence a + b = 8.
Stream:JEESubject:ChemistryTopic:STEREO ISOMERISMSubtopic:CALCULATION OF TOTAL STEREOISOMERS
⏱ 2mℹ️ Source: QB
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