AN ORGANOMETALLIC POLYIMINE COPOLYMER PREPARED FROM (ETA(6)-1,4-BIS(CHO)C6H4)CR(CO)(3) AND 1,3-PHENYLENEDIAMINE

The organometallic comonomer {eta(6)-1,4-bis(CHO)C6H4}Cr(CO)(3) (1) was prepared from {eta(6)-1,4-bis(Bu(3)Sn)C6H4}Cr(CO)(3) by Seyferth transmetalation and then treatment with N,N-dimethylformamide. Complex 1 was characterized by a single-crystal X-ray diffraction study: triclinic, P (1) over bar, a = 6.860(1), b = 12.649(3), c = 13.480(6) Angstrom, alpha = 111.10(3), beta = 90.30(3), gamma = 94.76(2)degrees, V = 1086.8(6) Angstrom(3), Z = 4, R = 3.93%, R(w) = 4.58%, GOF = 1.15. Complex 1 was copolymerized with 1,3-phenylenediamine to produce an organometallic-polyimine 2 (97%, T-m = 282 degrees C). The organometallic-polyimine 2 possesses a fully-conjugated organic polymer backbone. The copolymer was insoluble in common organic solvents, typical of a rigid-rod polymer.