Solid state polymerization of bis(trichlorophenoxo) cobalt(ii) complex to give poly(dichlorophenylene oxide)

Abstract

Synthesis of four‐coordinated (tetrahedral) trichlorophenol cobalt(II) complex with neutral ligand pyridine was achieved from the aqueous solution and its characterization was performed by UV‐visible, IR spectral and CHN analysis. Solid state thermal polymerization of the complex was accomplished first at constant temperature employing different time intervals and secondly at constant decomposition time. The poly(dichlorophenylene oxide)s so synthesized were characterized by IR, 1H NMR and 13C NMR spectral analysis, Tg determination, as well as measurement of molecular weight by a viscometric method.

Synthesis, crystal structure and characterization of new transition metal compounds of bromophenols: Bis(2,4,6-tribromophenolato) di(N-methylimidazole)M(II) (M=Co, Cu)

“…Selected bond lengths and angles are given in Table 3. [7]. These interactions explain the large tetrahedral angle O1-Co-O2 of 147.5(4) º. Steric effects could explain these large deviations from the ideal tetrahedral angle value of 109.5 º.…”

“…Coordination chemistry of halosubstituted phenols plays very important role in the formation of poly(dihalophenyleneoxide) polymers [7] because phenolic oxygens are very important in the metal containing active sites of biomacromolecules [8 ]. It is believed that the structure of the complexes and the kind of ligands has significant effects on polymerization [9][10].…”

Polymerization and characterization of various di(pyridine)bis(trihalophenolato)cobalt(II) complexes in solid and melt states

“…A series of copper complexes with different types of phenols with various amine ligands were decomposed thermally in solution4–13 or in the solid state14–18 or by electro initiation in solution19–34 in order to examine the effect of the method of decomposition, ligand type and position of substituted halogen on the phenol ring on the structure, molecular weight and percentage conversion of the polymeric products. In addition to copper complexes, halogenated phenol complexes with nickel(II)35, 36 and cobalt(II)37 with pyridine as ligand were synthesized and their thermal decomposition in the solid state was investigated.…”

Effect ofN‐Methyl Imidazole and Dimethyl Pyrazole Ligands on Polymerization of di(2,4,6‐Trichlorophenolato)Cu(II)/Co(II) Complexes in Solid State

“…6(c)] as in the case of the previous cobalt complex study. [19] Time had no effect on the viscosity values of the polymers synthesized at constant temperature from the decomposition of C1. However, as the temperature increased, viscosity values of the polymeric products increased (Tables 3 and 4).…”