K. W. Barnett
Feb 1, 1970
Citations
0
Influential Citations
16
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Bis(1,5-cyclooctadiene)nickel reacts smoothly with cyclopentadiene or methylcyclopentadiene to afford the new complexes π-C5H5NiC8H13 (I), and π-CH3C5H4NiC8H13 (II), respectively. NMR spectra suggest that the C8H13 fragments are bonded to nickel via one sigma and one pi-olefinic bond. The mechanism of formation of these complexes is believed to involve a mixed cyclopentadiene-cyclooctadiene nickel complex which undergoes a metal-assisted hydride shift from the five-membered ring to cyclooctadiene. Both (I) and (II) are apparently inert to substitution by tertiary phosphines or phosphites, but (I) undergoes carbon monoxide insertion to from the unstable π-C5H5NiCOC8H13, characterized by mass spectrometry.