Bis(trimethylphosphine)silver(I) hexafluorophosphate.

Acta Crystallogr C

Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1.

Published: July 2002

AI Article Synopsis

  • The two-coordinate silver compound [Ag(C(3)H(9)P)(2)]PF(6) has a mirror symmetry and closely resembles 3m (D(3d)) symmetry, featuring staggered methyl groups.
  • The silver atom exhibits nearly linear coordination, with a P-Ag-P angle of 178.70 degrees, and longer Ag-P bond lengths compared to analogous gold complexes.
  • The study highlights the absence of steric effects in the silver compound, allowing for a clearer comparison of metal-phosphorus bond distances and confirming that gold is indeed smaller than silver.

Article Abstract

In the title two-coordinate silver compound, [Ag(C(3)H(9)P)(2)]PF(6), the cation has crystallographically imposed mirror symmetry, and approximates very closely to 3m (D(3d)) symmetry with fully staggered methyl groups in the solid state. The Ag atom has a nearly linear coordination geometry, with a P[bond]Ag[bond]P angle of 178.70 (4) degrees. The Ag[bond]P bond lengths are 2.3746 (12) and 2.3783 (12) A, which are significantly longer than the Au[bond]P bond length of 2.304 (1) A in the analogous two-coordinate gold cation. The lack of intramolecular steric effects within the present cations containing trimethylphosphine (cone angle 118 degrees), compared with those in known cations containing trimesitylphosphine (cone angle 212 degrees), provides a better comparison of M[bond]P distances and thus more conclusive evidence that Au really is smaller than Ag.

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Source
http://dx.doi.org/10.1107/s0108270102007734DOI Listing

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