Derivatives of M(η5-C5H5)2 (M = Mo,W) with alkenylpyridines and related ligands |
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Authors: | Maria J. Calhorda Alberto R. Dias |
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Affiliation: | Centro de Quimica Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1096 Lisboa-Codex Portugal |
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Abstract: | Reactions of ligands 2-vinylpyridine 1, 4-vinylpyridine 2, 2-allylpyridine 3, 1-allylpyrazole 4, acrylonitrile 5 and allylcyanide 6 with the metallocene derivatives [Mo(η5-C5H5)2H3][PF6] 7, [Mo(η5-C5H5)2HI] 8, [W(η5-C5H5)2H3] [PF6] 9, [Mo(η5-C5H5)2H2] 10, [M(η5-C5H5)2Br2], M = Mo 11, M = W 12 are described. Reaction of 7 with 1, 8 with 1, 3 with 8 and 4 with 8 gave mixtures of metallocyle isomers resulting from coordination of the nitrogen atom to molybdenum followed by internal hydrometallation; reaction of 11 with 1 gave an olefinic π complex; reaction of either 9 or 11 with 1 gave intractable oils; reactions of 8 with 2, 11 with 5, 12 with 5, 11 with 6 and 12 with 6 yielded monosubstituted products in which the ligand is N-coordinated. |
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