Synthesis of Cp(CO)CoPt(PPh3)2(μ-CH2) and Cp2Co2Pt(PPh3)2(μ-CO)2 from the reaction of Pt(PPh3)2(C2H4) with [CPCo(CO)]2(μ-CH2)

Phillip D. Macklin*, Chad A. Mirkin, Nathan Viswanathan, Gregory D. Williams, Gregory L. Geoffroy, Arnold L. Rheingold

*Corresponding author for this work

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10 Scopus citations


Addition of Pt(PPh3)2(C2H4) to [CpCo(CO]2(μ-CH2) yields the bimetallic μ-methylene complex Cp(CO)CoPt(PPh3)2(μ-CH2) (3) along with the trimetallic cluster Cp2Co2Pt(PPh3)2(μ-CO)2 (4). Both complexes have been structurally characterized: 3, P21/n, a 12.240(6) Å, b 17.395(8) Å, c 17.887(9) Å, β 97.36(3)°, V 3777(2) Å3, Z = 4, Rf 4.8%, Rwf 4.9% for 3352 reflections with F0, ≥ 3σ(F0); 4, P1, a 11.511(3) Å, b 12.775(3) Å, c 16.526(4) Å, α 70.46(3)°, β 89.59(3)°, γ 64.18(2)°, V 2034.1(8) Å3, Z = 2, Rf 5.88%, Rwf 6.67% for 5865 reflections with F0 ≥ 3σ(F0). The CoPt bond in 3 is bridged by the μ-CH2 ligand with the Co further ligated by Cp and CO ligands and the Pt has two PPh3 ligands. Cluster 4 has a closed PtCo2 triangular structure with two semi-triply bridging CO ligands above and below the metal plane which interact with Pt less than with the two Co atoms. The Co atoms are each ligated by a Cp ligand and the Pt by two PPh3 ligands. Since complexes 3, and 4 are all isolobal with Pt(PPh3)2(CH2CH2), the reactions reported herein simply represent the interchange of one isolobal fragment with another.

Original languageEnglish (US)
Pages (from-to)117-128
Number of pages12
JournalJournal of Organometallic Chemistry
Issue number1-2
StatePublished - Nov 3 1987

ASJC Scopus subject areas

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


Dive into the research topics of 'Synthesis of Cp(CO)CoPt(PPh<sub>3</sub>)<sub>2</sub>(μ-CH<sub>2</sub>) and Cp<sub>2</sub>Co<sub>2</sub>Pt(PPh<sub>3</sub>)<sub>2</sub>(μ-CO)<sub>2</sub> from the reaction of Pt(PPh<sub>3</sub>)<sub>2</sub>(C<sub>2</sub>H<sub>4</sub>) with [CPCo(CO)]<sub>2</sub>(μ-CH<sub>2</sub>)'. Together they form a unique fingerprint.

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