Fourier transform heteronuclear magnetic triple resonance in complex spin systems—III: Symmetrical ditertiary phosphine complexes of group VI metal carbonyls期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Fourier transform heteronuclear magnetic triple resonance in complex spin systems—III: Symmetrical ditertiary phosphine complexes of group VI metal carbonyls

Authors:	Geoffrey T. Andrews Ian J. Colquhoun William McFarlane

Affiliation:	Chemistry Department, City of London Polytechnic, Jewry Street, London EC3N 2EY, England

Abstract:	Magnetic multiple resonance experiments of the types ¹³C-{³¹P, ¹H}, ¹³C{¹H} and ³¹P{¹⁸³W, ¹H} have been used to determine the magnitudes and signs of PC and PP coupling constants in the symmetrical complexes LM(CO)₄ (L = Ph₂P(CH₂)_nPPh₂, Ph₂PN(H)PPh₂, (Ph₂P)₂CCH₂, cis-Ph₂PCHCHPPh₂; M = Cr, Mo, W; n = 1–4). A knowledge of the signs of the couplings shows that they display a systematic pattern of behaviour according to metal atom and ring size and this may have diagnostic value. ¹³C, ³¹P and ¹⁸³W chemical shifts are also reported.

Keywords:	Author to whom correspondence should be addressed.
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