Solvent and pressure effects on the kinetics of reaction of manganese pentacarbonyl bromide with 2,2′-bipyridyl and on the charge-transfer spectrum of MnBr(bipy)(CO)3
Tóm tắt
Rate laws, rate constants, and activation volumes are reported for reaction of MnBr(CO)5 with 2,2′-bipyridyl and with 1, 10-phenanthroline in methanol. The activation volume of +22cm3 mol−1 is consistent with a predominantlyD mechanism (CO loss) in this medium, but in 50% aqueous methanol both the kinetic pattern and activation volumes in the region of −20 cm3 mol−1 for the MnBr(CO)5 + bipy reaction indicate a key role for bromide dissociation. The solvatochromic behaviour of the MnBr(bipy)(CO)3 product of these reactions is compared with that of other ternaryd
6-diimine complexes, and the piezochromic behaviour of its MLCT spectrum outlined.
Tài liệu tham khảo
J. Burgess and A. J. Duffield,J. Organometal. Chem.,177, 435 (1979).
G. Schmidt, Diplomarbeit, Technische Hochschule Darmstadt, 1985.
R. van Eldik,Angew. Chem. Int. Edn.,25, 673 (1986).
H. A. Sinn, Ph.D. Thesis, Darmstadt (1966).
H. Saito, J. Fujita and K. Saito,Bull. Chem. Soc. Jpn.,41, 863 (1968).
J. Burgess,J. Organomet. Chem.,19, 218 (1969).
S. Ernst and W. Kaim,J. Am. Chem. Soc.,108, 3578 (1986); and refs. therein.
J. Bjerrum, A. W. Adamson and O. Bostrup,Acta Chem. Scand.,10, 329 (1956).
H. Bock and H. tom Dieck,Angew. Chem. Internat. Edn.,5, 520 (1966);Chem. Ber.,100, 228 (1967).
J. Burgess,Spectrochim. Acta,26A, 1369, 1957 (1970).
R. bin Ali, J. Burgess, M. Kotowski and R. van Eldik,Transition Met. Chem.,12, 230 (1987).
M. Kotowski, R. van Eldik, R. bin Ali, J. Burgess and S. Radulović,Inorg. Chim. Acta,131, 225 (1987).
M. H. Quick and R. J. Angelici,Inorg. Synth.,19, 160 (1979).
N. Hallinan, P. McArdle, J. Burgess and P. Guardado,J. Organometal. Chem.,333, 77 (1987).
R. Mews,Angew. Chem. Int. Edn.,16, 56 (1977).
See, e.g., N. G. Connelly and L. F. Dahl,J. Chem. Soc., Chem. Commun., 880 (1970); N. G. Connelly and J. D. Davies,J. Organometal. Chem.,38, 385 (1972).
M. R. Snow and F. L. Wimmer,Inorg. Chim. Acta,44, L189 (1980).
H.-T. Macholdt and H. Elias,Inorg. Chem.,23, 4315 (1984); H.-T. Macholdt and R. van Eldik,Transition Met. Chem.,10, 323 (1985).
J. Burgess and A. E. Smith,Transition Met. Chem.,12, 140 (1987).
H. Elias, H.-T. Macholdt, K. J. Wannowius, M. J. Blandamer, J. Burgess and B. Clark,Inorg. Chem.,25, 3048 (1986).
R. J. Angelici and F. Basolo,J. Am. Chem. Soc.,84, 2495 (1962); D. A. Brown, H. J. Lyons and R. T. Sane,Inorg. Chim. Acta,4, 621 (1970).
K. Dimroth, C. Reichardt, T. Siepmann and F. Bohlmann,Ann.,661, 1 (1963); C. Reichardt,Angew. Chem. Int. Edn.,4, 29 (1965).
J. Burgess and E. Pelizzetti, to be published.
F. E. Smith and I. S. Butler,Canad. J. Chem.,47, 1311 (1969).
A. D. Allen and P. F. Barrett,Canad. J. Chem.,46, 1655 (1968).
R. Gross and W. Kaim,Inorg. Chem.,25, 498 (1986).
S. Kohlmann, S. Ernst and W. Kaim,Angew. Chem. Int. Edn.,24, 684 (1985).
M. Wrighton and D. L. Morse,J. Am. Chem. Soc.,96, 998 (1974).