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Interaction of mercury(II) halides with tertiary phosphine betaines: synthesis and structural characterization of [HgX2{Ph3P(CH2)2CO2}] (X=Cl, I) and [HgCl(μ-Cl)-{Ph3P(CH2)3CO2}]2

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Abstract

Three new mercury(II) complexes containing tertiary phosphine betaine ligands Ph3P+(CH2)2CO2 − and Ph3P+(CH2)3CO2 − have been synthesized and fully characterized by single-crystal X-ray analysis: [HgCl2{Ph3(CH2)2CO2}],1, space groupP21/n,a=9.819(2),b=14.966(4),c=14.973(5) Å, β=105.67(2)° andZ=4; [HgI2{Ph3(CH2)2CO2}],2,P21/n,a=10.206(2),b=14.807(3),c=15.557(3) Å, β=107.11(2)° andZ=4; [HgCl(μ-Cl){Ph3P(CH2)3CO2}]2,3,\(P\bar 1\),a=10.813(2),b=11.975(3),c=11.180(2) Å, α=87.04(2), β=75.14(1), γ=81.95(1)° andZ=1. The isomorphous complexes1 and2 contain discrete mononuclear molecules in which the mercury(II) atom is unsymmetrically chelated by a Ph3P+(CH2)2CO −2 ligand and coordinated by a pair of terminal halo ligands in a distorted tetrahedral environment, while3 consists of discrete centrosymmetric dinuclear molecules in which the betaine ligand Ph2P+(CH2)3CO −2 acts in the chelate mode and the mercury(II) atoms are unsymmetrically bridged by a pair of chloro ligands.

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  1. Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

    Song-Lin Li & Thomas C. W. Mak

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  1. Song-Lin Li
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Li, SL., Mak, T.C.W. Interaction of mercury(II) halides with tertiary phosphine betaines: synthesis and structural characterization of [HgX2{Ph3P(CH2)2CO2}] (X=Cl, I) and [HgCl(μ-Cl)-{Ph3P(CH2)3CO2}]2 . J Chem Crystallogr 27, 91–97 (1997). https://doi.org/10.1007/BF02575901

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  • DOI: https://doi.org/10.1007/BF02575901

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