Question

The total number of tautomers possible for I and II together is .......... 

Hint:

When dealing with tautomers, always consider the potential positions for protons and double bonds that can shift, affecting the molecular structure.

Answer 1

Correct Answer: 13

Step 1: Understanding Tautomerism.
Tautomerism refers to the phenomenon where two or more isomers (tautomers) exist in equilibrium, and they typically differ by the location of a proton or a double bond. In this case, the structures I and II represent two tautomeric forms of a compound, and we are asked to find the total number of possible tautomers.

Step 2: Analyzing Structure I and II.
For compound I, we can have tautomers where the position of the proton and the double bond varies. Similarly, compound II can also form tautomers by shifting the position of the proton or double bonds.

Step 3: Conclusion.
The total number of tautomers possible for compounds I and II together is 4. The answer is (B).