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Selective dynamics of [Rh(1,5-COD)(bidentate)]BF4 complexes via NMR exchange spectroscopy by Massimiliano Valentini; Kumaravel Selvakumar; Michael Wörle; Paul S Pregosin is a Chemistry article available to read on EtoBox.

What is Selective dynamics of [Rh(1,5-COD)(bidentate)]BF4 complexes via NMR exchange spectroscopy about?

NMR exchange measurements on [Rh(1,5-COD)(bidentate)]BF 4 complexes (bidentate=chiral bis-phosphine, a P,N-phosphinooxazoline, a P,S-phosphito-thioether and a bis-pyrazolylborate) show selective 1,5-COD dynamics which can be superficially attributed to olefin rotation. It is suggested that the mechanism actually involves: (i) M L 1 bond breaking (L 1 = N or S-donor); (ii) isomerization of the T-shaped species; (iii) rotation around the remaining M L 2 bond and (iv) recomplexation. The solid state structures of the two compounds [M(1,5-COD)(10)]BF 4 , M= Rh, Ir and 10=(S,R)-2-[4-(isopropyl)oxazol-2-yl]-2%-diphenylphosphino-1,1%-binaphthyl, were determined by X-ray diffraction methods.

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Author

Massimiliano Valentini; Kumaravel Selvakumar; Michael Wörle; Paul S Pregosin

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

1999

Language

EN

Field

Chemistry (Physical Sciences)