Journal of the Chemical Society Dalton Transactions · 1985 · 46 citations · 0 references
Natural SciencesChemistryCrystal StructureInorganic ChemistryOrganic ChemistryCrystal ChemistryCrystallographyMolecular SymmetryStructure DeterminationX-ray CrystallographyX-ray DiffractionCrystal Structure AnalysisCrystal Structure DeterminationMolecular Structure DeterminationX-ray Crystallographic RefinementX-ray Crystallography-based Structure DeterminationX-ray Diffraction Analysis
The crystal and molecular structure of (Me3Si)3CAsAsC(SiMe3)3 has been determined by X-ray diffraction. The diarsene crystallizes in space group P(no. 2), with a= 9.151 (3), b= 12.682(2), c= 15.537(4)Å, α= 70.07(2), β= 89.61(2), γ= 87.88(2)°, and Z= 2. The compound is isostructural with (Me3Si)3CPPC(SiMe3)3 and adopts a trans-planar conformation with AsAs = 2.245(1), 2.243(1)Å and As–As–C = 106.2(2), 106.4(2)° In two crystallographically independent molecules. Trends in the structures of REE′R′[EE′N or P, RR′C6H2But3–2,4,6; EE′P, RR′C(SiMe3)3 or NBut(SiMe3); EE′As, RR′C(SiMe3)3 or RC6H2But3–2,4,6,R′CH(SiMe3)2; EP,E′As, RC6H2But3–2,4,6,R′CH(SiMe3)2] are discussed.