Original scientific paper

Structural Studies of Steric Effects in Phosphine Complexes: Dimers of Bis-{dithiocyanato(1-phenyl-dibenzophosphole)mercury(II)} Associate with Significant Hg−N and Hg−S Interdimer Interactions

John F. Gallagher ; School of Chemical Sciences, Duhlin City University, Duhlin 9, Ireland
Elmer C. Alyea ; Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
George Ferguson ; Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada, N1G 2W1

Abstract

The title compound, [Hg(SCN)₂(C₆H₅)P(C₁₂H₈)]₂, exists as a dimer with two-fold crystallographic symmetry in the solid state with the Hg atoms linked by bridging N- and S-thiocyanato atoms. There are four primary bonds to each Hg atom, Hg−N, 2.771(4) A, Hg−P, 2.4084(11) Å and two Hg−S, 2.4565(10) Å and 2.6055(13) Å, result-ing in a distorted trigonal pyramidal geometry about the metal centre. The dimers associate about inversion centres to form infinite one-dimensional chains by weaker Hg⋅⋅⋅N 3.178(5) Å and Hg⋅⋅⋅S 3.6027(14) Å interactions, giving an overall distorted octahedral coordination geometry for each Hg atom. The Hg⋅⋅⋅P bond lies approximately orthogonal to the ⋅⋅Hg⋅⋅Hg⋅⋅ chain and the benzophosphole group forms a 'sandwich5 preventing interactions between the Hg(SCN)2 moieties in neighbouring chains.

Keywords

mercury; phosphine; thiocyanato; phenyldibenzophosphole; interdimer; interactions; stereochemistry

Hrčak ID:

132160

URI

https://hrcak.srce.hr/132160

Publication date:

1.9.1999.

Visits: 930 *