How many constitutional isomers are possible for C₆H₁₄? A)4 B)5 C)6 D)7 E)8

Question

Quizplus · Accepted Answer

To determine the number of constitutional isomers, we need to look at the connectivity of the atoms. The molecule given has 4 sulfur atoms and 5 uracil bases. Let's assume that the sulfur atoms are connected linearly. We can then connect the uracil bases in different ways, while making sure that each one is connected to at most one sulfur atom. We can also swap the positions of the hydrogen and the -OH group on the uracil bases. By doing so, we can generate 5 different arrangements of the uracil bases. For each arrangement, there are two possibilities for the position of the -OH group on each uracil base. Therefore, there are 5 x 2 x 2 = 20 different isomers. However, we need to divide by 4 to account for the fact that we assumed the sulfur atoms were connected linearly, when in fact they can be arranged in a cyclic fashion. This gives us 20/4 = 5 constitutional isomers.

How Many Constitutional Isomers Are Possible for C6H14

How Many Constitutional Isomers Are Possible for C₆H₁₄