37336-35-9Relevant academic research and scientific papers
Reactions of cationic gold clusters with lewis bases. Preparation and X-ray structure investigation of [Au8(PPh3)7](NO3) 2·2CH2Cl2 and Au6(PPh3)4[Co(CO)4]2
Van Der Velden,Bour,Bosman,Noordik
, p. 1913 - 1918 (2008/10/08)
The compound [Au8(PPh3)7](NO3) 2·2CH2Cl2 has been prepared and well characterized by a variety of physical measurements, including a complete X-ray structure analysis. It crystallizes in space group P21/n with Z = 4 and the following unit cell dimensions: a = 25.444 (6) A?, b = 17.332 (6) A?, c = 28.795 (6) A?, β = 97.66 (3)°, V = 12584.9 A?3. The cation consists of a central gold atom surrounded by seven peripheral Au-PPh3 moieties in an icosahedrally derived structure, with the following important distance ranges: Aucentr-Auper = 2.63-2.72 A?, Auper-Auper = 2.71-2.94 A?, and Au-P = 2.24-2.36 A?. Reaction of the coordinatively unsaturated [Au8(PPh3)7](NO3)2 with Li[Co(CO)4] results in the formation of the heterometallic Au6(PPh3)4[Co(CO)4]2, on which a complete X-ray structure determination has been performed. This compound crystallizes in the triclinic space group P1 with Z = 1 and the following unit cell dimensions: a = 13.672 (6) A?, b = 13.524 (4) A?, c = 14.160 (5) A?, α = 119.72 (2)°, β = 118.83 (3)°, γ = 71.32 (2)°, V = 1980.6 A?3. The centrosymmetric molecule contains a Au skeleton, which can be described as two tetrahedrons with one common edge, with the Au atoms being bonded either to a phosphine or to a Co(CO)4 group. Important distance ranges are Au-Au = 2.62-2.81 A?, Au-P = 2.28-2.37 A?, and Au-Co = 2.46 A?.
