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Heterobimetallic platinum(II)-palladium(II) complexes bridged by fluorobenzenethiolates. Structure and equilibria |
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| Authors: | Guillermina Rivera,Sylvain Bernè s,Hugo Torrens |
| Affiliation: | a Facultad de Estudios Superiores Cuautitlán, UNAM, Campo 1, 54740 Cuautitlán Izcalli, Edo. de México, Mexico b Facultad de Ciencias Químicas, UANL, Ciudad Universitaria, 66451 San Nicolás de los Garza, Nuevo León, Mexico c Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, 04510 México D.F., Mexico |
| Abstract: | Synthesis of the heterobimetallic platinum(II)-palladium(II) complexes with poly fluorinated benzenethiolates as intermetallic bridges, [(dppe)Pd(μ-SRF)2Pt(dppe)](SO3CF3)2 with SRF = p-SC6F4(CF3) (1), SC6F5 (2), p-SC6HF4 (3) and o-SC6H4(CF3) (4), have been accomplished either by a redistribution reaction in mixtures of the homonuclear bimetallic species, [(dppe)Pd(μ-SRF)2Pd(dppe)]2+/[(dppe)Pt(μ-SRF)2Pt(dppe)]2+ or by assembling the monometallic building blocks [(dppe)M(μ-SRF)2]/[(dppe)M′(solvent)2]2+, M, M′ = Pd or Pt. Both experimental systems reach an equilibrium state which is independent of the temperature within the probed range, −90 °C to +50 °C. A single crystal of the heterobimetallic compound [(dppe)Pd(μ-SC6F5)2Pt(dppe)](SO3CF3)2(acetone)2 (2) was isolated and analyzed by X-ray diffraction. Comparison with the corresponding structures exhibited by the homobimetallic analogous, [Pd2(μ-SC6F5)2(dppe)2](SO3CF3)2(acetone)2 (5) and [Pt2(μ-SC6F5)2(dppe)2](SO3CF3)2(acetone)2 (6) shows that all three structures are isostructural in space group  . All three compounds exhibit a centrosymmetric planar [M2(μ-S)2] ring in which the sulfur substituents are arranged in an anti configuration. |
| Keywords: | Heterobimetallics Palladium Platinum Fluorinated-thiolates Crystal structures |
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