Q. Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula C$_4$H$_8$O is:
A) 6
B) 8
C) 10
D) 11
Explanation
[Solution by Claude - not from source] Oxetanes: 2-methyloxetane (2 enantiomers), 3-methyloxetane (1). THF (1). Oxiranes: 2-ethyloxirane (2), 2,2-dimethyloxirane (1), 2,3-dimethyloxirane (cis meso, plus trans pair = 3). Total $2+1+1+2+1+3=10$. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.