Carbo-cations may be stabilized by:
(a) π-bonds only at allylic position
(b) π-bonds only at vinylic position
(c) π-bonds at allylic and benzylic position also (d) -I effect
While the answer is obviously not (d), I am really confused about what 'allylic', 'vinylic' and 'benzylic' positions actually mean. I have heard about allylic/vinylic/benzylic carbons, but positions..?
The question has been taken from ADVANCED PROBLEMS IN ORGANIC CHEMISTRY by HIMANSHU PANDEY