How many trans isomers are there for an alkene with the formula, C₄H₇Cl?

Question

Quizplus · Accepted Answer

The alkene in question is C=SUB14S1UB0HS1UB17S1UB0Cl. The trans isomers are those in which the two highest priority groups are on opposite sides of the double bond. The two highest priority groups in this case are the Cl and the HS. There are two trans isomers in which the Cl and HS are on opposite sides of the double bond, as shown below:

B.   Cl                 HS
     ||                ||
   SUB14S1UB0         S1UB17S1UB0

D.   HS                 Cl
     ||                ||
   SUB14S1UB0         S1UB17S1UB0

Therefore, the answer is B.

How Many Trans Isomers Are There for an Alkene with the Formula