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dipotassium tetracyanoplatinate(IV) dihalides; platinum cyanides; crystal structures; X-ray scattering; vibrational Spectroscopy
Abstract:
Crystals of K2Pt(CN)(4)Br-2, K2Pt(CN)(4)I-2 and
K2Pt(CN)(4)Cl(2)(.)2H(2)O were grown, and their crystal structures have
been determined from single crystal data. The structure of
K2Pt(CN)(4)Cl-2 has been determined and refined from X-ray powder data.
All compounds crystallize monoclinicly (P2(1)/c; Z = 2), and
K2Pt(CN)(4)X-2 with X = Cl, Br, I are isostructural. K2Pt(CN)(4)Cl-2: a
= 708.48(2); b = 903.28(3); c = 853.13(3) pm; beta = 106.370(2)degrees;
R-p = 0.064 (N(hkl) = 423). K2Pt(CN)(4)Br-2: a = 716.0(1); b =
899.1(1); c = 867.9(1) pm; beta = 106.85(1)degrees; R(F)(N') = 0.026
(N'(hkl) = 3757). K2Pt(CN)(4)I-2: a = 724.8(1); b = 914.5(1); c =
892.1(1) pm; beta = 107.56(1)degrees; R(F)(N') = 0.025 (N'(hkl) =
2197). K2Pt(CN)(4)Cl-2 (.) 2H(2)O: a = 763.76(4); b = 1143.05(6); c =
789.06(4) pm; beta = 105.18(1)degrees; R(F)(N') = 0.021 (N'(hkl) =
2281). Raman and infrared spectroscopy data are reported.
