Flexible Metal Chelate Polymers Through Nonrigid Metal Centers.
Final rept. 5 Apr 76-4 Apr 79,
MASSACHUSETTS UNIV AMHERST DEPT OF CHEMISTRY
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Flexible polymers from conjugated organic ligands and nonrigid metal centers have been synthesized and have been evaluated for thermal stability. A tungsten polymer, bis5,7-dichloro-8-quinolinolato-5,8-quinoxalinediolato-tungstenIV with number average molecular weight near 40,000 to 50,000 Daltons has been synthesized from the quinoxalinedione and a tungstenII intermediate. Several other polymers, monomers, and intermediates have also been investigated, where the metals range from molybdenum and tungsten to zirconium and the eight-coordinate centers are all N4O4 ligand donor sets, and with the seven-coordinate intermediate possessing carbon, phosphorus, nitrogen, oxygen, andor chlorine donors. The molybdenum and tungsten species appear to have energy-transfer potential. Author