Syntheses and X-ray structures of mixed-metal gold phosphine clusters including an example having a highly asymmetric Re2Au2 skeleton

Yoshitaka Katsukawa, Satoru Onaka, Yasuhiro Yamada, Masahiro Yamashita

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10 Citations (Scopus)

Abstract

This study describes the synthesis and single crystal X-ray characterization of three new heteronuclear gold clusters, i.e. (OC)5Re-Re(CO)4Au2dppfe (1), Au4Co2(CO)7(PPh3)3 (2), and [Au-Co(CO)4]2(cis-dpen) (3). They were synthesized from reaction of (AuCl)2dppfe with NaRe(CO)5 at room temperature, reaction of (PPh3)AuCl with NaCo(CO)4, and reaction of (AuCl)2-(cis-dpen) with NaCo(CO)4, respectively. Compound 1 crystallizes in the monoclinic space group P21/n with a = 15.331(7), b = 23.427(9), c = 13.621(6) Å, β = 112.53(3)° and Z = 4. Compound 2 crystallizes in the triclinic space group P1 with a = 12.838(4), b = 22.406(6),_c = 11.759(4) Å, a = 103.15(2), β = 117.06(2), γ = 82.78(2)°, and Z = 2. Compound 3 crystallizes in the triclinic space group P1 with a = 10.704(2), b = 17.437(3), c = 10.597(2) Å, α = 96.73(2), β = 108.02(2), γ = 99.53(2)°, and Z = 2. In 1, two gold atoms in the Au2dppfe group are bound to one Re atom in the Re2(CO)9 group. Thus, the total skeleton is highly asymmetric. The metal skeleton of 2 is composed from a butterfly-like Au4 backbone with a capping Co(CO)3 group and the terminal Co(CO)4 group coordinated to one Au atom. Two gold atoms come close in 3 to cause intramolecular aurophilic interaction. Terminal Co(CO)4 groups in 2 make an intermolecular pair in a head-to-tail manner in the crystal.

Original languageEnglish
Pages (from-to)255-265
Number of pages11
JournalInorganica Chimica Acta
Volume294
Issue number2
DOIs
Publication statusPublished - 1999 Nov 10

Keywords

  • Cluster complexes
  • Crystal structures
  • Gold complexes
  • Phosphine complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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