TY - JOUR
T1 - 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)
AU - Macklin, Phillip D.
AU - Mirkin, Chad A.
AU - Viswanathan, Nathan
AU - Williams, Gregory D.
AU - Geoffroy, Gregory L.
AU - Rheingold, Arnold L.
N1 - Funding Information:
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.
PY - 1987/11/3
Y1 - 1987/11/3
N2 - 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.
AB - 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.
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U2 - 10.1016/0022-328X(87)80043-8
DO - 10.1016/0022-328X(87)80043-8
M3 - Article
AN - SCOPUS:0007930308
SN - 0022-328X
VL - 334
SP - 117
EP - 128
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -