Question

Crown ethers are named as $X-crown-Y$ . In the following crown ether, $X$ and $Y$ are respectively

• A. $6$ and $12$
• B. $18$ and $6$
• C. $24$ and $6$
• D. $6$ and $24$
• E. $6$ and $18$

Answer 1

Answer: (B)

X-crown-Y, 18-crown-6 First number X is the total number of ${}^{\prime }{C}^{\prime }$ and ${}^{\prime }{O}^{\prime }$ atoms in the ring and second number Y is the number of oxygen atom in ring.