Crystal structure of bis(l-arginine)copper(II) hexachlorodimercurate, [Cu(l-Arg)2]Hg2Cl6 |
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| Authors: | M. Zabel V. I. Pavlovskii A. L. Poznyak |
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| Affiliation: | (1) Institute of Inorganic Chemistry, University of Regensburg, Regensburg, Germany;(2) B. I. Stepanov Institute of Physics, National Academy of Sciences, Belarus, Minsk, White Russia |
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| Abstract: | By means of X-ray diffraction the chain structure of [Cu(l-Arg)2]Hg2Cl6 (monoclinic, a = 10.2348(9) Å, b = 9.1386(7) Å, c = 14.8521(14) Å, β = 97.455(11)°, space group P21) is established. The chains are formed by square-planar [Cu(l-Arg)2]2+ cations of the type trans-[Cu(N)2(O)2] (l-Arg is the zwitter-ion of arginine; Cu-N 1.992 Å and 1.938(6) Å, Cu-O 1.953 Å and 1.967(4) Å) that are bonded to two adjacent binuclear [Cl2Hg(μ-Cl)2HgCl2]2? ions through its clorine atoms Cl (Hg-Cl bonds are within 2.34–2.78 Å). With these two additional Cu…Cl contacts Cu adopts the geometry of an elongated octahedron with two apical Cl (Cu-Cl 2.961 Å and 3.064(3) Å). |
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| Keywords: | crystal structure complexes of Cu(II) with arginine chloromercurate(II)-ions |
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