Portal de Periódicos da CAPES

Hydridotris(pyrazolyl)borato complexes of the group 5 metals: inorganic and organometallic chemistry

1996; Elsevier BV; Volume: 156; Linguagem: Inglês

10.1016/0010-8545(95)01236-2

1873-3840

Michel Étienne,

Metal complexes synthesis and properties

This review is devoted to the inorganic and organometallic chemistry of Group 5 metal complexes containing hydridotris(pyrazolyl)borates. The first part of the review describes the advances made in the chemistry of tris(pyrazolyl)borato vanadium complexes. The physico-chemical properties of these complexes are being studied mainly to model vanadium-histidine interactions which occur in metalloproteins such as bromoperoxidase. Although most of the complexes studied to date are oxo vanadium species, some other simple hydridotris(pyrazolyl)borato vanadium complexes have also been synthesized, but their organometallic chemistry remains undeveloped. The second part of the review focuses on the organometallic chemistry of hydridotris(pyrazolyl)borato niobium and tantalum complexes. The main advances have been made in the field of tour-electron alkyne niobium complexes. The structural data available are described and, as far as possible, correlated with the observed organometallic chemistry. Throughout, comparison with known Group 5 alkyne and related (such as imido, etc.) complexes containing cyclopentadienyl ligands is emphasized. Although very few articles have yet appeared, the results indicate clearly that a rich and promising organometallic chemistry can be expected.