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• W2062609480 abstract "The former reported complex cis,meso-[Pt2Cl4P4] (1), where P4 is 1,1,4,7,10,10-hexaphenyl-1,4,7,10-tetraphosphadecane and which contains a chloro bridge only in solution, is fully characterized by an X-ray structure analysis: triclinic, P1; a=8.395(2), b=11.675(2), c=13.717(3) Å, a=92.54(3), β=98.93(3), γ=109.28(3)°, R=0.059 for 2872 observed reflections (F>6.0(F)). It shows an open-mode dimer with a Pt-Pt distance of 6.916(1) Å and a cis P4 configuration. A comparison with the X-ray structure of cis,rac-[Pt2Cl4P4] (2) is given. 2 also contains a chloro bridge only in solution, and these chloro bridges of 1 or 2 are replaced by hydride in rac-[Pt2H2(μ-H)P4](BF4) (3), by pyridine in rac-[Pt2Cl2(μ-C5H5N)P4](BPh4)2 (4), by pyrazolate (Pz) in rac-[Pt2Cl2(μ-Pz)P4](BPh4) (5), and by imidazolate (Im) in meso-[Pt2Cl2(μ-Im)P4](BPh4) (6) and rac-[Pt2Cl2(μ- Im)P4](BPh4) (7). In rac-[Pt2Cl2(μ-Cl)(μ-dppa)P4](BPh4) (8), where dppa is 1,2-bis(diphenylphosphino)acetylene, an additional dppa bridge occurs. The complexes have been characterized by 195Pt{1H}, 31P{1H} and 1H NMR spectroscopy, elemental analyses and melting points. 3, 4, 5, 7 and 8 show that rac-P4 is flexible enough to allow the reaction with bridging ligands of very different sizes, whereas in the case of meso-P4 only the incorporation of imidazolate (6) is possible. This different behavior of meso- and rac-P4 is discussed with respect to the X-ray structures of 1 and 2, showing that completely different rotation isomers could be responsible for the observed reactivity. In meso-[Pt2Cl(μ-Cl)(SnCl3)P4](BPh4) (9) the oxidative addition of SnCl2 is only possible at a terminal PtCl bond." @default.
• W2062609480 created "2016-06-24" @default.
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• W2062609480 date "1994-08-01" @default.
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• W2062609480 title "Binuclear platinum(II) complexes of 1,1,4,7,10,10-hexaphenyl-1,4,7,10-tetraphosphadecane (P4) containing various bridging ligands as spacers between the P4 coordination units" @default.
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• W2062609480 doi "https://doi.org/10.1016/0020-1693(94)03979-8" @default.
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