Polynuclear homo- or heterometallic palladium(II) - platinum(II) pentafluorophenyl complexes containing bridging diphenylphosphido ligands. Synthesis and crystal structure of [(C6F5)2Pt(μ-PPh2)2Pt(phen)]

J. Forniés, C. Fortuño, R. Navarro, F. Martínez, A. J. Welch

Research output: Contribution to journalArticle

Abstract

The binuclear anionic derivatives (NBu4)2[(C6F5)2M(μ-PPh2)2M′(C6F5)2] (M = M′ = Pd, 1; M = M′ = Pt, 2; M = Pd, M′ = Pt, 3) have been obtained by treating either (NBu4)2[(C6F5)2M(μ-X)2M′(C6F5)2] (X = Cl, Br) with LiPPh2 (1,2) or [cis- M(C6F5)2(PPh2)2]2- with M′(C6F5)2(THF)2 (1,2,3). These binuclear derivatives react with HCl yielding the tetranuclear complexes (NBu4)2[(C6F5)2M(μ-PPh2)2 M′(μ-Cl)2M′(μ-PPh2)2M(C6F5)2] (7: M = M′ = Pt; 8: M = M′ = Pd; 9: M = Pt, M′ = Pd). However, 2 and 3 react with HCl in the presence of PPh3 to yield the binuclear asymmetric complexes (NBu4)[(C6F5)2M(μ-PPh2)2M′(C6F5)(PPh3)] (10: M = M′ = Pt; 11: M = Pt, M′ = Pd). The tetranuclear complexes 7, 8, and 9 react with bidentate ligands yielding the neutral asymmetric binuclear complexes [(C6F5)2M(μ-PPh2)2M′(LL)] (5: M = M′ = Pt; LL = dppm; 12: LL = phen; 13: M = M′ = Pd, LL = bipy). The salts Li2[M(C6F5)2(PPh2)2] (M = Pd, Pt) react with PtCl2(dppm), [Pt(μ-Cl)(C6F5)(tht)]2 or PtCl2 to yield [(C6F5)2M(μ-PPh2)2Pt-(dppm)] (4: M = Pd; 5: M = Pt), (NBu4)[(C6F5)2Pt(μ-PPh2)2Pt(C6F5)(tht)] (6) or (NBu4)2[(C6F5)2Pt(μ-PPh2)2Pt(μ-Cl)2Pt(μ-PPh2)2Pt(C6F5)2] (7), respectively. These complexes have been characterized by IR and 19F and 31P NMR spectroscopy, the latter indicating that in all cases no metal-metal bonds are present. The molecular structure of [(C6F5)2Pt(μ-PPh2)2Pt(phen)] has been established by an X-ray diffraction study. The Pt...Pt distance (3.5711(9) Å) confirms that there is no PtPt bond.

Original languageEnglish
Pages (from-to)643-658
Number of pages16
JournalJournal of Organometallic Chemistry
Volume394
Issue number1-3
DOIs
Publication statusPublished - 11 Aug 1990

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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