Lewis-base adducts of group 11 metal(I) compounds. LIX. Crystal structure determinations of tetrakis(trimethylphosphine)copper(I) halides and tetrakis(triphenylphosphine)-copper(I) and -silver(I) hexafluorophosphates.
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HEALY, PC
ENGELHARDT, LM
KILDEA, JD
SKELTON, BW
WHITE, AH
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Abstract
The crystal structures of [Cu(Pme3)4]X (X = Cl , Br, I) and of [M(PPh3)4] [PF6] (M = Cu, Ag) have been determined by single-crystal X-ray diffraction methods at 295 K. The former compounds contain nearly tetrahedral [Cu(PMe3)4]+ ions on sites of m symmetry with mean Cu-P bond lengths of 2.270, 2.271 and 2.278 ? for X = Cl , Br and I respectively. The latter compounds contain [M(PPh3)4]+ ions on sites of 3 symmetry. In the M =Ag complex the coordination environment is close to tetrahedral, but in the M =Cu complex the length of the axial Cu-P bond [2.465(2)?] is significantly shorter than that of the off-axis bonds [2.566(2)?]. Possible reasons for this are discussed.
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Australian Journal of Chemistry
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43
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Chemical sciences