10
1 Parent Structures
5-Ethynyl-3-pentylhepta -1,3,6-triene
4-Vinylhept -l-ene-5-yne
For simply branched hydrocarbons and their substituent groups the following trivial designations are retained
Isobut {ane, Isopent {ane, Isohex {ane (CH 3 hCH-(CH 2 )n-CH3
yl
yl
yl
respectively
Isoprene ~
"
Isopropyl
(CH3hCH -, Isopropenyl ==<
seC-Butyl 1\ tert-Butyl (CH3hC- !
Instead of the alphanumerical group designations -CH3 , -C2Hs, -C3H7 ,
-C4H9 the alphabetical short forms -Me, -Et, -Pr, -iPr, -Bu, -iBu, -sBu,
-tBu can be employed analogously.
1.1.3
Systems with Branched Side Chains
If further branched side chains are present it must be remembered that
side chains are always connected through their position 1 with the main