1980 Volume 37 Issue 10 Pages 697-700
A solution of a complex of poly ((R) -glutamic acid) and rhodium (I) complex was prepared by mixing poly ((R) -glutamic acid) with di-μ-chlorobis- [bis (cyclooctene) rhodium (I)] in N, N-dimethylacetamide in a charged molar ratio of glutamic acid residue to rhodium (I) 20. By standing the resulting solution for 12 h at 80°C, the polymer complex solution was converted to a catalyst solution for homogeneous hydrogenation of olefins in N, N-dimethylacetamide under an atmospheric pressure. When sebacic acid as a monomeric analogue was used in place of poly ((R) -glutamic acid), metallic rhodium precipitated in the standing process. The catalyst solution of poly ((R) -glutamic acid). rhodium (I) complex exhibited a large catalytic activity for 1-hexene, methyl acrylate, and dimethyl maleate in the homogeneous state. When di-μ-chlorobis bis (cyclooctene) rhodium Oil with excess lithium chloride was used as a monomeric analogue for the catalyst, metallic rhodium precipitated during the hydrogenation of 1-hexene.
