Synthetic, structural, and solution calorimetric studies of Pt(CH3)(2)(PP) complexes

D C Smith, C M Haar, E D Stevens, Steven Patrick Nolan, W J Marshall, K G Moloy

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Reaction enthalpies of the complex (COD)PtMe2 (1; COD = eta(4)-1,5-cyclooctadiene) with an extensive series of bidentate phosphines (dpype, dppf, diop, dppe, dppb, dppp, dpmcb, depe, dmpe, dcpce) have been measured by solution calorimetry. The relative stabilities of the resulting complexes PtMe2(PP) are determined by a combination of the donor and bite angle/ steric properties of the bidentate phosphine ligand. In general, good sigma donor ligands with small bite angles result in more thermodynamically stable complexes. Additionally, the molecular structures of 1, Pt(Me)(2)(pype) (2), Pt(Me)(2)(dppf) (8), Pt(Me)(2)(diop) (4), Pt(Me)(2)(dppe) (6), Pt(Me)(2)(dpmcb) (9), and Pt(Me)(2)(Et(2)dppp) (13) have been determined by single-crystal X-ray diffraction. No correlation between the thermochemical results and the structural parameters, e.g, M-P distance (as observed in other systems), is apparent in this class of complexes.

Original languageEnglish
Pages (from-to)1427-1433
Number of pages7
JournalOrganometallics
Volume19
Issue number7
DOIs
Publication statusPublished - 3 Apr 2000

Keywords

  • TERTIARY PHOSPHINE-LIGANDS
  • ORGANORUTHENIUM THERMOCHEMISTRY
  • PHOSPHORUS LIGANDS
  • ENTHALPIES
  • BOND
  • SUBSTITUTION
  • ENERGIES
  • SYSTEM
  • FRAGMENT
  • BINDING

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