- The reaction of nickel(II) xanthates with tetraphenyldiphosphinoethane (dppe) revisited. Formation and crystal structures of Ni3S 2(S2COR)2(dppe) (R = Me, Et; dppe = Ph 2PCH2CH2PPh2) at room temperature and of Ni(S2CO)(dppe) at 150 K
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The reaction between nickel(II) xanthates with tetraphenyldiphosphinoethane in molar ratio Ni:dppe 2:1 gives trinuclear complexes, [Ni3(μ2-S)2(S 2COR)2(dppe)] (R = Me, Et), whose crystal structures were investigated by single crystal X-ray diffraction. These complexes contain a trigonal bipyramidal central Ni3S2 core, with sulfur atoms in axial positions and nickel atoms in equatorial positions. One of the nickel(II) sites is coordinated by a chelating dppe ligand, the other two nickel atoms are chelated by two xanthate ligands. The crystal structure of [Ni(S2CO)(dppe)], which is formed in reactions of nickel(II) xanthates with excess dppe, was reinvestigated at low temperature (150 K) and more accurate parameters were obtained.
- Haiduc, Ionel,Semeniuc, Radu F.,Campian, Marius,Kravtsov, Victor Ch.,Simonov, Yurii A.,Lipkowski, Janusz
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p. 2895 - 2900
(2008/10/08)
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- Reactions between Bis(O-alkyl dithiocarbonato)nickel(II) Complexes and Phosphines. Formation of a Dithiocarbonate Complex of Nickel(II):
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The behaviour of O-alkyl dithiocarbonato complexes, , towards several phosphines has been studied.Depending on the S2COR derivative and phosphine (L) used, octahedral complexes , paramagnetic five-co-ordinate complexes , and square-planar (R=Et or cyclo-C6H11) and complexes have been obtained.The reaction of (R=Me, Et, or cyclo-C6H11) with an excess of dppe gives which is the first NiII-dithiocarbonate complex described.This compound reacts with MeI and C3H5Br to give (X=I or Br).There is no reaction with Lewis-base N donors or with carbon monoxide.
- Perpinan, Maria F.,Ballester, Loreto,Gonzalez-Casso, Maria E.,Santos, Amelia
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p. 281 - 284
(2007/10/02)
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