Synthesis and crystal structures [Co(2,3-tri)2Cl]•ZnCl4•Cl•H2O and [Co(amp)3]•amph•Cl•2ZnCl4•H2O

Two Co(III) complexes [Co(2,3-tri)(2)Cl] center dot ZnCl4 center dot Cl center dot H2O (2,3-tri=N-(2-Aminoethyl)-1,3-propanediamine) and [Co(amp)(3) center dot amph center dot Cl center dot 2ZnCl(4) center dot H2O (amp =2-(Aminomethyl)pyridine, amph=2-(Aminomethyl)-1,10-phenanthrol-ine) have been synthesised and isolated. In the complex of [Co(2,3-tri)(2)Cl] center dot ZnCl4 center dot Cl center dot H2O, a pentaamine cobalt(III) cation was formed because the six member ring formed with the ligand 2,3-tri and the Co(III cation in the complex [Co(2,3-tri)(2)Cl] center dot ZnCl4 center dot Cl center dot H2O has a tendency to disassociate. Thus, the amino propyl group is dangling in the complex. For the complex [Co(aMP)(3)] center dot amph center dot Cl center dot 2ZnCl(4) center dot H2O, a hexamine cobalt(III) cation was formed, and the C-H...pi interactions between the 5-proton of a pyridyl and an adjacent pyridyl could be the driving force in the formation of the complex.