PHIP (parahydrogen-induced polarisation) effects in the H-1 NMR spectra of the products of Rh-complex-catalysed alkyne hydrogenation brings to light the fact that the cis-trans isomerisation of the formed olefin occurs through the formation of a sigma-bonded intermediate stabilised by the reversible addition of a hydrogen molecule at the metal centre.
The Detection of PHIP Effects Allows New Insights into the Mechanism of Olefin Isomerisation during Catalytic Hydrogenation
VIALE, Alessandra;SANTELIA, Daniela;NAPOLITANO, ROBERTA;GOBETTO, Roberto;DASTRU', Walter;AIME, Silvio
2008-01-01
Abstract
PHIP (parahydrogen-induced polarisation) effects in the H-1 NMR spectra of the products of Rh-complex-catalysed alkyne hydrogenation brings to light the fact that the cis-trans isomerisation of the formed olefin occurs through the formation of a sigma-bonded intermediate stabilised by the reversible addition of a hydrogen molecule at the metal centre.
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