The preparation and properties of η3-cycloalkenylcarbonylvanadium complexes of the following types are reported: (η3-enyl)V(CO)5, (η3-enyl)V(CO)4PR3 (R = Et, Ph) and (η3-enyl)V(CO)3L2 (L2 = dppe (1,2-bis(diphenylphosphino)ethane), dppm (bis(diphenylphosphino)methane), arphos (1-diphenylphosphino-2-diphenylarsinoethane); L = PPh3).
Electron-transfer processes with substituted group 5 metal carbonyls. Synthesis, crystal and molecular structure of Ag3M3(CO)12(Me2PCH2CH2PMe2)3, M = Nb, Ta, the first structurally characterized carbonyl derivatives of niobium(0) and tantalum(0)
Some new tetracarbonyl derivatives of tantalum(I), TaI(CO)4LL (LL = tmeda, dppm, 2,2′-dipy), have been obtained by diiodine oxidation of [Ta(CO)6]− in the presence of the bidentate ligand.
Unusually Weak Metal−Hydrogen Bonds in HV(CO)<sub>4</sub>(P−P) and Their Effectiveness as H<sup>•</sup> Donors
作者:Jongwook Choi、Mary E. Pulling、Deborah M. Smith、Jack R. Norton
DOI:10.1021/ja710455c
日期:2008.4.1
The V-H bonds in HV(CO)(4)(P-P) are unusually weak (55 to 58 kcal/mol). They transfer H center dot to styrene more rapidly than CpCr (CO)(3)H does and are effective stoichiometric reagents for the cyclization of appropriate 1,6-dienes.
Phosphine-stabilized derivatives of hexacarbonylvanadium(0)