POLYMER COMPLEXES .27. NOVEL MIXED-VALENCE-LIGAND POLY(2-ACRYL-AMIDO-1-PHENYL-2-AMINOTHIOUREA) COMPLEXES

Polymer complexes of homopolymer (APATH) with Rh (III) and Ru (III) ha ve been prepared and characterized through chemical analyses, thermal, electronic and infrared spectral studies, and magnetic and conductanc e measurements. The homopolymer shows three types of coordination beha viour. In the mixed valence paramagnetic trinuclear polymer complexes ((1) and (2) in the paper), and in the mononuclear polymer compound (3 ) it acts as a neutral bidentate ligand coordinating through the thioc arbonyl sulphur and carbonyl oxygen atoms, while in the mixed ligand p aramagnetic poly-chelates, which are obtained from the reaction of APA TH with RuCl3.XH2O in the presence of N-heterocyclic bases consisting of polymer complexes (7) and (9), and in mononuclear compounds (6) and (8), it behaves as a monobasic bidentate ligand coordinating through the same donor atoms. In mononuclear compounds (4) and (5) it acts as a monobasic and neutral bidentate ligand coordinating only through the same donor atoms. Monomeric distorted octahedral or trimeric chlorine -bridged, approximately octahedral structures are proposed for these p olymer complexes. Various ligand field parameters have been calculated and discussed. The poly-chelates are of 1:1, 1:2 and 3:2 (metal: poly -Schiff base) stoichiometry and exhibit five and six coordination. The rmogravimetric studies indicate that these polymer complexes are stabl e up to approximately 200-degrees-C and undergo complete decomposition in the range 200-570-degrees-C resulting in the formation of the stab le metal oxides. The toxicity of the complexes and ligand have been de monstrated.