Abstract
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 language | English (US) |
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Pages (from-to) | 117-128 |
Number of pages | 12 |
Journal | Journal of Organometallic Chemistry |
Volume | 334 |
Issue number | 1-2 |
DOIs | |
State | Published - Nov 3 1987 |
Funding
We thank the Department of Energy, Office of Basic Energy Sciences for support of this research, the National Science Foundation for contributing funds toward the purchase of the X-ray diffractometer at the University of Delaware, and R.J. Hale and G. Steinmetz at Tennessee Eastman Co. for obtaining the FD mass spectra.
ASJC Scopus subject areas
- Biochemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry