Mcompus=12n+2n-1+35,5=14n+34,5 g/mol
Mcompus..........100%
35,5...................46,4%
Mcompus=35,5*100/46,4=76,5g/mol
14n+34,5=76,5 => 14n=42 => n=3
f.m: C3H5Cl
CH2=CH-CH2-Cl
CH2=C(Cl)-CH3
Cl-CH=CH-CH3 se prezinta sub forma de izomeri geometrici cis si trans
1-cloro-ciclopropan