131135-77-8Relevant articles and documents
Structural and spectroscopic trends in mononuclear arylchalcogenolato-palladium(II) and -platinum(II) complexes: Crystal structures of [M(TeAr)2(dppe)] {M = palladium, platinum; Ar = phenyl, 2-thienyl; dppe = 1,2-bis(diphenylphosphino)ethane}
Risto, Maarit,Jahr, Esther M.,Hannu-Kuure, Milja S.,Oilunkaniemi, Raija,Laitinen, Risto S.
, p. 2193 - 2204 (2007/10/03)
A series of mononuclear [M(EAr)2(dppe)] [M = Pd, Pt; E = Se, Te; Ar = phenyl, 2-thienyl; dppe = 1,2-bis(diphenylphosphino)ethane] complexes has been prepared in good yields by the reactions of [MCl2(dppe)] and corresponding ArE- with a special emphasis on the aryltellurolato palladium and -platinum complexes for which the existing structural information is virtually non-existent. The complexes have crystallized in five isomorphic groups: (1) [Pd(SePh)2(dppe)] and [Pt(SePh)2(dppe)], (2) [Pd(TePh)2(dppe)] and [Pt(TePh)2(dppe)], (3) [Pd(SeTh)2(dppe)], (4) [Pt(SeTh)2(dppe)] and [Pd(TeTh)2(dppe)], and (5) [Pt(TePh)2(dppe)]. In addition, solvated [Pd(TePh)2(dppe)] · CH3OH and [Pd(TeTh)2(dppe)] · 1/2CH2Cl2 could be isolated and structurally characterized. The metal atom in each complex exhibits an approximate square-planar coordination. The Pd-Se, Pt-Se, Pd-Te, and Pt-Te bonds span a range of 2.4350(7)-2.4828(7) A?, 2.442(1)-2.511(1) A?, 2.5871(7)-2.6704(8) A?, and 2.6053(6)-2.6594(9) A?, respectively, and the respective Pd-P and Pt-P bond distances are 2.265(2)-2.295(2) A? and 2.247(2)-2.270(2) A?. The orientation of the arylchalcogenolato ligands with respect to the M(E2)(P2) plane has been found to depend on the E-M-E bond angle. The NMR spectroscopic information indicates the formation of only cis-[M(EAr)2(dppe)] complexes in solution. The trends in the 31P, 77Se, 125Te, and 195Pt chemical shifts expectedly depend on the nature of metal, chalcogen, and aryl group. Each trend can be considered independently of other factors. The 77Se or 125Te resonances appear as second-order multiplets in case of palladium and platinum complexes, respectively. Spectral simulation has yielded all relevant coupling constants.
Synthesis and characterisation of mono- and binuclear palladium and platinum complexes with organochalcogenides
Singhal, Anshu,Jain, Vimal K.,Varghese, Babu,Tiekink, Edward R.T.
, p. 190 - 196 (2008/10/08)
Mononuclear palladium and platinum complexes of the type M(ER)2(P∩P) [M = Pd or Pt; ER = SPh, SC6H4Cl-4, SC6H4Me-4, SC6F5, SePh, TeC6H4OEt-4; P∩P = dppm or dppe] have been prepared and their ability to form dinuclear metal species has been demonstrated. All complexes have been characterised by multinuclear magnetic resonance (1H, 13C, 77Se, 195Pt) spectral data. The effects of phosphine ligands and organochalcogenides are reflected in the 77Se and 195Pt NMR shifts. The shielding of 195Pt NMR chemical shifts has been interpreted in terms of their binding ability to platinum. The structures of two derivatives, namely [Pd(SC6F5)2(dppe)] and [Pd(SePh)2(dppe)], have been established by X-ray crystallography. The palladium atom in each of the monomeric structures exists in a square planar geometry.
