η3 -Allyl-hydrogensulfidonickel(II)-Komplexe / η3 -Allyl-hydrogensulfidonickel(II) Complexes
Open Access
- 1 February 1980
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 35 (2) , 200-206
- https://doi.org/10.1515/znb-1980-0214
Abstract
Bis(η3-allyl)- or bis ( η3 -2-methylallyl )nickel react with hydrogensulfide at -78 °C to give in high yields the dimeric di-μ-hydrogensulfido-bis(η3-allyl)dinickel(II) (2) or di-μ-hydrogensulfido- bis(η3-2-methylallyl)dinickel(II) (2a), respectively, which decompose above 20 °C to give nickelsulfide and propene or isobutene. From bis(η3-allyl)nickel and deuterium sulfide, the di-μ-deuteriumsulfido-bis(η3-allyl)dinickel(II) was obtained. The high resolution 1H NMR spectra reveal the existence of three stereoisomers of 2 or 2 a to which the structures c, d and e have been assigned. The high resolution 1H NMR spectrum of η3-allyl-hydrogensulfido(trimethylphosphine)nickel(II) (3) at -100 °C is consistent with a square planar structure; above -100 °C an equilibration process between syn-, syn- and anti-, anti-protons occurs and above - 20 °C equilibration of syn- and anti-protons of the η3-allyl group is observed.Keywords
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