Preparation and properties of the formamidino complexes [M(π-C5H5){HC(NR)2}(CO)2] (M = molybdenum or tungsten; R = aryl or alkyl) |
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| Authors: | WH De Roode ML Beekes A Oskam K Vrieze |
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| Institution: | Anorganisch Chemisch Laboratorium, J.H. van ''t Hoff Instituut, University of Amsterdam, Nieuwe Achtergracht 166, Amsterdam-1004 (The Netherlands) |
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| Abstract: | The preparation and properties of the complexes M(π-C5H5){HC(NR)2}CO)2] (M = Mo, W; R = aryl or alkyl) are reported. The complex Mo(π-C5H5){HC(N-p-tolyl)2}(CO)2] could be prepared by (a) reaction of MoCp(CO)3Cl with M′{HC(N-p-tolyl)2} (M′ = K, Ag or Cu); (b) irradiation of MoCp(CO)3Cl with HC(HN-p-tolyl)N-p-tolyl); and (c) reaction of MoCp(CO)3]2 with M′{HC(N-p-tolyl)2} (M′ = Ag or Cu). The several routes to this complex give indications of the mechanisms of formation. The structure of these complexes and the bonding nature of the metal with the formamidino group is discussed on basis of the 1H and 13C NMR and IR spectra.Reaction of N,N′-dimethyl formamidine with MCp(CO)3Cl gave the complex M(π-C5H5){HC(NMe)N(CO)Me}(CO)2], containing a carbonyl inserted between the metal and the formamidino group. Irradiation of this carbamoyl complex caused decarbonylation, yielding the complex M(π-C5H5){HC(NMe)2}CO)2]. |
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| Keywords: | Author to whom inquiries are to be addressed Fellow of the Alfred P Sloan Foundation 1974–1976 and recepient of a Dreyfus Teacher-Scholar Grant 1975–1980 |
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