A. Mantovani, A. Marcomini, U. Belluco
May 1, 1985
Citations
0
Influential Citations
8
Citations
Journal
Journal of Molecular Catalysis
Abstract
Abstract The Ni(O) monophosphite complex, Ni(CO)3L, where L = P(O-i-C3H7)3, oligomerizes phenylacetylene to 1,2,4-triphenylbenzene with a selectivity greater than 95%. The reaction when carried out in boiling benzene shows a high activity for the catalyst, typically 200 mol alkyne per 1 mol Ni h−1. Below 70 °C the reaction does not proceed at all for substrate/catalyst molar ratios of the order of 300. Increasing the temperature increases the conversion of the substrate and decreases the induction period. Experiments carried out in the presence of CO and free L show a decreased reaction rate, indicating a possible competition of these ligands with the alkyne for the catalyst.