Ligands derived from 8-quinoline, 6-quinoline, 1 -isoquinoline, and 5-isoquinoline
were synthesized. These compounds have been used as ligands for complexation of
transition metals, such as copper(II) and nickel(II). According to the spectrosocopic
data, copper(II) cation forms (I: 1) and (I:2) complexes with 2-(8-quinoly1)-l,l,3,3- tetramethylguanidine and 2- (I '-isoquinoly1)- 1,1,3,3-tetramethylguanidine, respectively. In contrast, 2-(6'-quinoly1)- 1, l,3,3-tetramethylguanidine and 2-(5'-isoquinoly1)- 1,1,3,3-tetramethylguanidine ligands were shown only in (1: 1) metal-ligand complex. When these ligands are reacted with nickel(II), the same results are obtained.