Substituted cyclopentadienyl compounds: IV. NMR spectra of chloro-substituted (η5-cyclopentadienyl)-rhodium-(η4-diene) compounds and the crystal structure of (η5-chlorocyclopentadienyl)-(η4-2,3-dimethoxybutadiene)rhodium (I)
作者： Graeme Hogarth , Michael Arthurs , John C. Bickerton , Leo Daly , Colin Piper
DOI: 10.1016/0022-328X(94)88019-0
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摘要: The molecular structure of (eta-C5H4Cl)Rh(eta4-C4H4(OMe)2) (1) has been determined. orientation the ligands is one in which cyclopentadienyl ring substituent bond lies a mirror plane that bisects two terminal carbon-carbon bonds butadiene ligand. This conformation associated with population rotamer eta4-diolefin-eta1-alkyl character. Extended Huckel orbital calculations show this preferred to alternative eta3-allyl-eta2-ene form 1. H-1 NMR data for I and related compounds suggest metal-coupling patterns reflect variation charge density within substituted ring.
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