Analysis of SU(3)c ⊗ SU(3)L ⊗ U(1)x local gauge theory

Six different models, straightforward extensions of the standard model to SU(3)(c) circle times SU(3)(L)circle timesU(1)(X), which do not contain particles with exotic electric charges are presented. Two of the models are one family and four are three family models. In two of the three family models one of the families transforms different from the others, and in the other two all the three families are different.