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- Boström, Dan, et al.
(författare)
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CIS-Trans Influences on Square-Planar Platinum(II) Complexes : Structure of CIS-BIS (Dimethyl Sulfoxide) Dinitratoplatinum (II)
- 1991
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Ingår i: Acta Crystallographica Section C. - Copenhagen, Denmark : Munksgaard International Publishers. - 0108-2701 .- 1600-5759. ; 47, s. 2101-2104
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Tidskriftsartikel (refereegranskat)abstract
- cis-[Pt{(CH3)2SO}2(NO3)2], M(r) = 475.36, monoclinic, P2(1)/c, a = 9.006 (1), b = 14.209 (2), c = 10.908 (2) angstrom, beta = 117.88 (1)-degrees, V = 1233.9 (2) angstrom 3, Z = 4, D(x) = 2.559 Mg m-3, lambda(Mo K-alpha)BAR = 0.7107 angstrom, mu = 11.84 mm-1, F(000) = 896, T = 293 K, R = 0.033 for 1763 unique reflections [I > 3-sigma(I)]. The Pt atom coordinates two S atoms from two dimethyl sulfoxide ligands and two O atoms from different nitrate ions in a slightly distorted square-planar geometry (maximal deviation 0.10 angstrom) in a cis arrangement. The compound consists of van der Waals packed molecules appearing in pairs with a Pt-Pt distance of 4.008 (1) angstrom. The acceptor-donor distances observed are: Pt-S = 2.214 (3), 2.220 (3) and Pt-O = 2.040 (9), 2.059 (9) angstrom. These are almost the same as the corresponding ones previously found in tetrakis(dimethyl sulfoxide)platinum(II) bis(trifluoromethanesulfonate) where two dimethyl sulfoxide ligands bond to Pt via their O atoms, also in a cis position. A literature survey of platinum dimethyl sulfoxide compounds shows that the Pt-S distance is significantly affected by both cis and trans influences.
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| 2. |
- LYXELL, DG, et al.
(författare)
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MULTICOMPONENT POLYANIONS .44. THE STRUCTURE OF TETRAGUANIDINIUM DIHYDROGENPENTAMOLYBDODIPHOSPHATE MONOHYDRATE
- 1991
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Ingår i: Acta Chemica Scandinavica. - 0904-213X .- 1902-3103. ; 45:7, s. 681-686
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Tidskriftsartikel (refereegranskat)abstract
- The crystal structure of [C(NH2)3]4H2Mo5P2O23.H2O was determined from X-ray single-crystal data. Anisotropic refinement in the space group P2(1)/c resulted in R = 0.043, using 7011 unique reflections. Cell parameters are a = 14.608(2), b = 13.054(2), c = 15.887(2) angstrom and beta = 92.47(1)-degrees. The structure contains H2Mo5P2O23(4-) anions, C(NH2)3+ cations and water molecules. The links between these units are mainly due to hydrogen bonds. The anions are arranged in layers almost parallel to (100).
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