Journal article

Halocarbonyltungsten(II) complexes containing tripodal tris(pyrazolyl)borate ligands

CG Young, S Thomas, RW Gable

INORGANIC CHEMISTRY | AMER CHEMICAL SOC | Published : 1998

Abstract

The halo tricarbonyl complexes LWX(CO)(3) (X = I, Br, Cl) are formed when NEt(4)[LW(CO)(3)] is reacted with I(2), N-bromosuccinimide, and N-chlorosuccinimide (or PhICl(2)), respectively, while reaction of NEt(4)[L(Pr)W(CO)(3)] and I(2) yields L(Pr)WI(CO)(3) [L = hydrotris(3,5-dimethylpyrazol-1-yl)borate, L(Pr) = hydrotris(3-isopropylpyrazol-1-yl)borate]. Reaction of NEt(4)[LW(CO)(3)] with Br(2) yields mixtures of LWBr(CO)(3) and L(Br)WBr(CO)(3) [L(Br) = hydrotris(4-bromo-3,5-dimethylpyrazol-1-yl)borate] as a result of competitive bromination of both tungsten and ligand L. The complexes generally exhibit three nu(CO) bands, one at ca. 2025 cm(-)(1) and two between 1930 and 1900 cm(-)(1), and ..

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