Summary
The synthesis and properties of the [(η5-C5H5)L(RN3R)CoIII]PF6 complexes, with L = PEt3, PPh3, P(OMe)3 or P(OPh)3, are reported. A six coordinate configuration containing a chelating triazenido ligand is proposed which is isostructural with the known complexes of iron and nickel.
The spectroscopic properties of the isoelectronic Co and Fe complexes, (η5-C5H5)L(RN3R)M, are compared in relation to the charge on the central metal atom. The complex with L = CO could not be prepared, but the carbonyl inserted product (η5-C5H5)(L{RNNN(R)C(O)}Co was isolated. In one of the reactions, the novel ring-bound triphenylphosphine complex, [η5-C5H5)(η5-C5H4PPh3)CoIII](PF6)2, was isolated as a side product. The mechanism of this reaction is discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
E. Pfeiffer and K. Vrieze, Part 1,Transition Met. Chem., 4, 389 (1979).
E. Pfeiffer, A. Oskam and K. Vrieze,Transition Met. Chem., 2, 240 (1977).
D. R. Eaton, A. D. Josey, W. D. Philips and R. E. Benson,J. Chem. Phys., 37, 347 (1962).
W. H. de Roode and K. Vrieze,J. Organometal. Chem., 153, 345 (1978).
E. Pfeiffer, M. W. Kokkes and K. Vrieze, Part 3,Transition Met. Chem., 4, 393 (1979).
L. Tonioli, G. Biscontin, M. Nicolini and R. Cipollini,J. Organometal. Chem., 139, 349 (1977).
A. Salzer,Inorg. Chim. Acta, 17, 221 (1976).
H. Friedel, I. W. Renk and H. tom Dieck,J. Organometal. Chem., 26, 247 (1971).
S. D. Robinson and M. F. Uttley,J. Chem. Soc. Chem. Comm., 1315 (1971).
R. B. King and K. C. Nainan,Inorg. Chem., 14, 271 (1975).
J. Kuyper, P. I. van Vliet and K. Vrieze,J. Organometal. Chem., 105, 379 (1976).
G. A. Gray,J. Am. Chem. Soc., 95, 7736 (1973).
N. L. Holy, N. C. Baenziger and R. M. Flynn,Angew. Chem., 90, 732 (1978).
R. Kübler, W. Lüttke and S. Weckerlin,Z. Electrochem., 64, 650 (1960).
R. J. Cross and R. Wardler,J. Chem. Soc. A, 2000 (1975).
H. H. Karsch, H. F. Klein and H. Schmidbaur,Chem. Ber. 107, 3692 (1974).
C. A. Tolman, L. W. Yarbrough and J. G. Verkade,Inorg. Chem., 16, 479 (1977).
P. Griess,Liebigs Ann. Chem., 137, 53 (1866).
R. F. Heck,Inorg. Chem., 4, 855 (1965).
R. B. King,Inorg. Chem., 5, 82 (1966).
A stable cobalt hydride could be isolated in the Me related reaction, [η5-C5H5)(PRt3)2Co](BF4)2 + PEt3→ [(η5-C5H4PEt3)(PEt3)2HCo](BF4)2, R. J. McKinney, private communication.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Pfeiffer, E., Kokkes, M.W. & Vrieze, K. Isostructural triazenido complexes of first row transition metals. Part 2. Synthesis and properties of [(η5-C5H5)L(RN3R)CoIII]PF6, L = PEt3, PPh3, P(OMe)3 and P(OPh)3 . Transition Met Chem 4, 389–393 (1979). https://doi.org/10.1007/BF00623985
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00623985