ortho (O)
1,2 substitute benzene
phenyl vs benzyl
both are 6 ring with double bonds, benzyl has 1 extra carbon in a chain
but-
4
trans
different side of C=C
para (p)
1,4 substitute benzene
eth-
2
cyclo____
ring
pent-
5
pro-
3
meth-
1
cyclo____yl
ring substituate
z-configuration
higher priority substituents are on the “zame” side
double bond
-ene
meta (m)
1,3 substitute benzene
cis
same side of C=C
triple bond
-yne
carbon chain with double or triple bond most contain-
entire double/triple bond
NO2
nitro