“…According to Hantzsch (462), these isomers correspond to a cistrans isomerism. Several complexes of 2,2'- (183) and 4,4'-dithiazolyl (184) were also prepared and found similar to pyridyl analogs (185) ( Table 1- 63). Zn(II), Fe(II), Co(II), Ni(I1) and Cu(I1) chelates of 2,4-bis(2-pyridy1)thiazole (186) and (2-pyridylamino)-4-(2-pyridyl)thiazole (187) have been investigated.…”