out of the following compds. all atoms are in one plane are;
(A) c=c-c=c
(B) c≡c-c=c
(C) c=c=o
(D) c=c=c
(add hydrogens wherever necessary)
ans = B,C JEE 2011 Q.
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1 Answers
71A, not because there is possibility of bond rotation about sigma bond and hence in some conformation, the hydrogen might lie out of the plane.
B. Is
C. Is.
D) It is a kind of allene. Even no of successive bonds between the carbon atoms renders the first and last one out of plane.
