Gehinderte ligandenbewegungen in übergangsmetall-komplexen

Kreiter, Cornelius G.; Koemm, Ulrich

doi:10.1016/s0022-328x(00)83807-3

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…Die Synthese der Olefinkomplexe gelingt ebenfalls photochemisch über einen intermediären, nicht isolierbaren THF-Komplex (2), der in einer Dunkelreaktion mit elektronenarmen Olefinen (3)(4)(5)(6)(7)(8) die Olefinkomplexe (9)(10)(11)(12)(13)(14) ergibt. …”

Section: Oktaedrische Monoolefinkomplexe Des Wolframs Lassen Sich Ausunclassified

Gehinderte Ligandbewegungen in Übergangsmetallkomplexen, XIX [1]. Oktaedrische Wolfram-Olefin-Komplexe mit Bisphospbinoethan-Liganden / Hindered Ligand Motions in Transition Metal Complexes, XIX [I]. Octahedral Tungsten Olefin Complexes with Bisphosphinoethane Ligands

Kreiter

Koemm

1983

Zeitschrift Für Naturforschung B

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(OC-6-32)-W(CO)3[(CH3)2PC2H4P(CH3)2] (olefin) complexes (9-14) were prepared photochemically from W(CO)4[(CH3)2PC2H4P(CH3)2](l) via W(CO)3[(CH3)2PC2H4P(CH3)2]- (THF) (2) and the electron poor olefins dimethyl inalonate(3), fumarate (4), inothylfumarate (5), fluorofumarato (6), chlorofumarato (7) and bromofumarate (8). The stereochemistry of 9-14 was elucidated by IR and NMR spectroscopy. The hindered rotations of the olefin ligands in 9-14 were studied by D-NMR spectroscopy. 11-14 form two diastereomeric isomers when the olefin rotation is freezed. The spectroscopic behaviour of the dimethyl fumarato complex 10 gives unambiguous proof for the rotation of the olefin ligand around the metal-olefin-bond. Alternative motions are ruled out.