New hybrid inorganic-organic polymers containing cyclophosphazenes as pendant groups: Cyclophosphazene ligands containing hydrazone linkages and their conversion to polymers

Abstract

The reaction of the cyclotriphosphazene N3P3Cl5[O-C6H4-p-C6H4-p-CH=CH2] (2) with 10 equiv of N-methylhydrazine proceeds in a regio-specific manner to afford the multi-functional hydrazide N3P3[N(Me)NH2]5[O- C6H4-p-C6H4-p-CH=CH2] (3). Condensation of 3 with o-hydroxy benzaldehyde or pyridine-2-carboxaldehyde affords the corresponding hydrazones N3P3[N(Me)N=CH-C6H4-o-OH]5[O-C6H4-p-C6H4-p-CH=CH2] (4) and N3P3[N(Me)N=CH-C6H4N]5[O-C6H4-p-C6H4-p-CH=CH2] (5), respectively. These hydrazones can be homopolymerized to afford polymers 6 and 7 containing multi-site coordinating cyclophosphazenes as pendant groups.Key words: cyclophosphazene, hydrazone, pendant polymers, hybrid polymers, polymeric ligands.