SUBSTITUTION REACTION OF LIGANDS IN TRINUCLEAR Mo CLUSTERS WITH "LOOSE COORDINATION SITE" AS WELL AS SYN-THESIS AND CRYSTAL STRUCTURE OF Mo 3 (μ 3 -S) (μ-S) 3 (dtp) 3 (C 3 H 4 N 2 ) 3 (dtp)·(CH 3 ) 2 CO

Abstract

When trinuclear molybdenum cluster compound with "loose coordination site", Mo 3 (μ 3 -S) (μ-S) 3 (μ-dtp)(dtp) 3 ·H 2 O(A) (dtp=diethyldithiophos-phinato anion), is reacted with an excess of imidazole, the H 2 O ligand and the bidentate bridging ligand μ-dtp are found to be simultaneously substituted by the imidazole to form the title compound. The title crystal belongs to the space group P(?), Z =2, with the following unit cell parameters: a =14.465(2), b =14.653(4), c =14.886(6), α =99.36(3), β =93.11(2), γ =114.29(2), V =2812(3). The crystalline compound consists of an ordered array of the cluster cation and dtp anion with acetone as packed molecule. The cation possesses a symmetry of C 3 . Three Mo atoms form basically an equilateral triangle with three Mo—Mo bond lengths of 2.763 (1), 2.762(1), 2.756(1) respectively.