POLYTERTHIOPHENE-BEARING PENDANT ORGANOMOLYBDENUM COMPLEXES - ELECTROPOLYMERIZATION OF O)(4)(MU-ETA(2)-ETA(2)-C(R)C[C4HS(C4H3S-2)(2),5])]

Terthiophenes bearing pendant organomolybdenum complexes, o-[Mo-2(eta- C5H5)(2)(CO)(4){mu-eta(2):eta(2)-C(R)= C[C4HS(C4H3S-2)(2)-2,5]} (R = H 1a or Ph 1b) were prepared by reaction of [Mo-2(eta-C5H5)(2)(CO)(4)] with 3'-alkynyl-2,2':5',2 ''-tertiophenes. The molecular structures of 1a and 1b were identified by spectroscopic methods and X-ray diffract ion. Cyclic voltammetry of 1a and 1b showed deposition of electroactiv e polymeric films on the electrode surface. The absorption spectra of 1a, 1b and their polymer films are presented.