THE SYNTHESES OF PYRIDINE-FUNCTIONALYZED METHYLIDYNETRICOBALT NONA-CARBONYL CLUSTERS, THEIR X-RAY ANALYSES, AND ITS COORDINATION TO PD(II)

Two kinds of methylidynetricobalt nonacarbonyls with a pyridine functi onal group as an apical substituent have been synthesized from trichlo romethylpyridine derivatives. The structures of two new clusters have been determined by single crystal X-ray analysis. EH-MO calculations h ave shown that the atomic charge on the N atom in NC5H4-3-CCo3(CO)(9) is close to that of beta-picoline. This cluster can coordinate to Pd(I I) and trans-PdCl2{NC5H4-3-CCo3(CO)(9)}(2) with a nanometer dimension has been synthesized as a precursor of molecular dot. (C) 1998 Elsevie r Science S.A. All rights reserved.