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Synthesis and Structure of the Decanuclear Gold( I ) Cluster Cation [Au 8 (AuCl) 2 {μ 3 ‐P( t Bu)} 2 {μ‐P( t Bu)=C(NMe 2 ) 2 } 6 ] 4+ with Bridging Phosphaalkene and Phosphanediide Ligands
Author(s) -
Weber Lothar,
Lassahn Ulrich,
Stammler HansGeorg,
Neumann Beate,
Karaghiosoff Konstantin
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200212)2002:12<3272::aid-ejic3272>3.0.co;2-k
Subject(s) - chemistry , molar ratio , cluster (spacecraft) , stereochemistry , medicinal chemistry , crystallography , organic chemistry , computer science , programming language , catalysis
Reaction of the inversely polarized phosphaalkene HP=C(NMe 2 ) 2 ( 1 ) with [AuCl(PPh 3 )] ( 2a ) in a molar ratio of 2:1 in THF led to the formation of complex [Au{HP=C(NMe 2 ) 2 } 2 ]Cl ( 3 ) as a pale yellow solid. In contrast to this, treatment of 2a with two molar equivalents of t BuP=C(NMe 2 ) 2 ( 4 ) afforded a mixture of [Au{P( t Bu)=C(NMe 2 ) 2 } 2 ] + Cl − ( 5 ) and [{(Me 2 N) 2 C=( t Bu)PAu} 2 (μ‐Cl)] + Cl − ( 6 ). In CH 2 Cl 2 solution this mixture was slowly converted into the novel decanuclear complex [Au 8 (AuCl) 2 {μ 3 ‐P( t Bu)} 2 {μ‐P( t Bu)=C(NMe 2 ) 2 } 6 ] 4+ (Cl − ) 4 ( 7 ) featuring six edge‐bridging phosphaalkene ligands and two μ 3 ‐ tert ‐butylphosphanediide ligands. In solution the cluster 7 shows a high order 31 P{ 1 H} NMR spectrum of the [AB 2 C] 2 type. According to the X‐ray structural analysis the Au 10 framework may be described as a slightly puckered ladder constructed of three quadrangles. The central Au 4 parallelogram is capped on both faces by a pair of [ t BuPAuCl] units. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)