Carbon atoms directly attached to a functional group
Alpha carbon
Carbon atom directly holding a double bond
Vinylic or Olefinic carbon
Carbon atom directly holding a double bond
Vinylic or Olefinic carbon
Carbon atom position next to a vinylic carbon
Allylic carbon
Carbon atom positioned next to a benzene
Benzylic carbon
Respective patterns around the benzene ring 1,2 / 1,3 / 1,4
Ortho/Meta/Para