An organometallic tetranuclear cluster with phosphine and phosphido ligands in nonclassical bonding modes: X-ray structural characterization
摘要:
The elimination of the NCMe ligand in [(C6F5)(2)Pt(mu-PPh2)(2)M(NCCH3)(2)] (M = Pd, Pt) results in the formation of the tetranuclear clusters [Pt2Pd2(p-PPh2)(3)(C6F5)(3)(PPh2C6F5)]1 and [Pt-4(mu-PPh2)(4)(C6F5)(4)](2). The structure of 1 indicates that one of the palladium centres is connected to the rest of the centres through two M-M bonds and two weaker eta(2) -C6H5 and eta(2) -P-C interactions. (c) 2006 Elsevier B.V. All rights reserved.
Formation of PPh2C6F5 through Phosphido Platinum and/or Palladium(III) Intermediates,
摘要:
The two-electron oxidation reactions of the neutral [(C6F5)(2)M(mu-PR2)(2)M'(NCCH3)(2)] (M = M' = Pt or Pd, M = Pt, M' = Pd) complexes using I-2 as oxidant have been investigated by experimental (R = Ph) and electronic structure calculation methods (R = H). It was found that a reductive coupling of PR, and C6F5 takes place along the reaction pathway for all oxidized complexes. The most salient structural features of the [(C6F5)(2)Pt(mu-PR2)(2)Pd(C6F5)(2)](2-), [(C6F5)(2)Pd(mu-PR2)(2)Pd(acac)](-), and [(C6F5)(2)Pt(mu-PR2)(2)PtI2] complexes (experimental R = Ph) are reproduced very well by the B3LYP/lan12dz calculations (R = H).