87247-41-4Relevant academic research and scientific papers
Cumulenes as ligands. (η2-Butatriene)platinum(0) complexes, a new structural class of cumulene complexes
White, Mitchell R.,Stang, Peter J.
, p. 1654 - 1658 (2008/10/08)
Displacement of ethylene from bis(triphenylphosphine)(ethylene)platinum(0) by four different butatrienes led to four new π complexes. In contrast to known butatriene complexes, the IR, 1H NMR, and 31P NMR spectra of these platinum compounds clearly show that the metal is bound to a terminal unsaturation of the triene. The π-bonding nature of the ligand attachment is indicated by the fast atom bombardment mass spectra and also ligand exchange reactions involving maleic anhydride. Attempts to produce binuclear platinum complexes were unsuccessful, but the platinum fragment may be replaced by rhodium upon reaction with Wilkinson's catalyst. These results are discussed in detail.
Cumulenes as ligands. Heterobimetallic η2-butatriene complexes containing both a main-group metal and rhodium
White, Mitchell R.,Stang, Peter J.
, p. 1382 - 1385 (2008/10/08)
The interaction of Si-, Ge-, and Sn-functionalized butatrienes with Wilkinson's catalyst produced five new rhodium π complexes, in moderate to good yields. These compounds are all air-stable, crystalline solids, which exhibit some degradation in chlorocarbon solution over a period of days. The IR and 1H NMR spectra of these complexes show that they are structurally analogous to the recently reported rhodium complexes of hydrocarbon butatrienes. The 31P NMR spectra indicate that these complexes are in general diastereomeric mixtures. There is no evidence of insertion of the rhodium fragment into the group 4 metal-carbon bond. The butatriene ligand can be freed from the complexes by exposure to carbon monoxide. These results are discussed in detail.
