SYNTHESIS, CHARACTERIZATION AND X-RAY CRYSTAL-STRUCTURE OF THE BENZENEDITHIOLATOHAFNIUM(IV) PORPHYRIN COMPLEX

A novel hafnium porphyrin complex Hf(TPP)(bdt) (TPP = 5,10,15,20-tetra phenylporphyrinate; bdt=benzenedithiolate) was synthesized and charact erized. The X-ray crystal structure of the complex revealed a six-coor dinate Hf atom surrounded by 4 N atoms of the porphyrin and 2 S atoms of the bdt ligand. The two sulfur atoms of the bdt are in an eclipsed position with respect to the two opposite pyrrole nitrogen atoms of th e porphyrin. Crystal data for Hf(TPP)(bdt): tetragonal, P4(1)2(1)2, a = 12.471(2), c = 26.966(3) angstrom, V= 4038.2(7) angstrom3, Z = 4; R = 0.054 and R(w) = 0.060 for 2673 independent reflections with I > 3si gma(I).