학술논문
Use of the Cationic Fragments [Ru(η5-C5H5) (MeCN)3]+ and [M(η6-C6H5R)(MeCN)3]+ (M=Os, Ru; R=H, Me) as Ionic Coupling Reagents in the Synthesis of the Clusters [Os4M2(CO)12(η6-C6H5R)], [Os4M(CO)12(η6-C6H6)(Au2dppm)] and [Os5Ru(CO)15(η5-C5H5)(AuPPh3)]*
Document Type
Academic Journal
Author
Source
Journal of Cluster Science. Jun 01, 2005 16(2):127-150
Subject
Language
English
ISSN
1040-7278
Abstract
The clusters [H2Os4M(CO)12(η-C6H6)] (M=Os, Ru) may be deprotonated to generate anions [Os4M(CO)12(η-C6H6)] which react with [M′(η-C6H5R) (MeCN)3](M′=Os, Ru; R=H, Me) to give the bicapped tetrahedral clusters [Os4(CO)12MM′(η-C6H5R)2]. Whereas [Os4(CO)12M2(η-C6H6)2] (M=Os, Ru) have one M(η-C6H6) unit in a site connected to three other metals, {3}, and one in a site connected to four other metals, {4}, [Os4(CO)12OsRu(η-C6H6)2] has the Ru(η-C6H6) unit in the {3} site irrespective of whether the Os or Ru anion is capped. Coupling of these anions with Au2dppm yields [Os4M(CO)12(η-C6H6)(Au2dppm)] (M=Os, Ru), which have the arene ligand in the axial site of a trigonal bipyramid and the digold unit capping two faces. Reduction of [H2Os5(CO)15] with K/Ph2CO and coupling with [Ru(η-C5H5)(MeCN)3]yields the monoanion [Os5(CO)15Ru(η-C5H5)] which reacts with [AuPPh3] generating [Os5(CO)15Ru(η-C5H5)(AuPPh3)] with the “Ru(C5H5)” unit in the terminal {3} site.