SYNTHESIS, STRUCTURE AND THERMAL PROPERTIES OF RHENIUM CARBONYL CONTAINING HETEROBIMETALLIC DERIVATIVES OF VANADIUM (III)

Abstract

This paper describes the data on synthesis of bis(cyclopentadienyl)vanadium(III) of pentacarbonyl rhenium bistetrahydrofuranate complex with the reaction between dicyclopentadienylvanadium (III) chloride and rhenium sodiumpentacarbonyl in tetrahydrofurane (THF). Formed in this case the target product was separated from reaction mixture by extracting with hot hexane. Their reactionary ability in relation to protonic and aprotonic acids Lewis had been inverstigated. It is revealed, that at interaction of the above mentioned complexes with HCl there is a splitting Re-V bond with formation (C5H5)2VCl and HRe(CO)5; (C5H5)2VCl and HRe(CO)4PPh3 respectively. At interaction with HgCl2 also occurs having break V-Re bond and it turn out (C5H5)2VCl and (OC)5ReHgCl; (C5H5)2VCl and PPh3(OC)4ReHgCl. The interection of these complexes with ligands of various dentate is investigated. A monodentate liqand-triphenil phosphine (PPh3) substitutes one of carbonyl-groups in Re(CO)5) – fragment. Bidentate ligand- acetylacetone (acac) easily push out from coordination sphere vanadium more donor ligand cyclopentadienyl. The composition and structure of the complexes were characterized by the data of NMR, IR, EPR-spectroscopy and thermal analysis.