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Studies on Cyclic Bis(η5:?-2-cyclopentadienylidene-ethyl)- and Bis(η5:?-4-cyclopentadienylidenebutyl)-molybdenum Compounds
Green, Malcolm L. H.,O'Hare, Dermot
, p. 1585 - 1590 (1985)
Co-condensation of molybdenum atoms with spironona-1,3-diene gives the compound 5:?-C5H4(CH2)3CH2>2> (1).Protonation of (1) causes the cleavage of only one Mo-C bond and following a β-elimination reaction a mixture of exo- and endo-5-C5H4Bun)(η5:η2-C5H4CH2CH2CH=CH2)H>PF6 (2) is formed.Treatment of (2) with NaOH gives 5-C5H4Bun)(η5:η2-C5H4CH2CH2CH=CH2)> (3).Compound (1) with iodine gives 5-C5H4Bun)(η5-C5H4CH2CH2CH=CH2)I2> (4).Treatment of 5:?-C5H4CH2CH2)2> with benzoic acid forms 5-C5H4Et)(η5:?-C5H4CH2CH2)(O2CPh)> (5), which with SiMe3Cl forms 5-C5H4Et)2Cl2> (6) and 5-C5H4Et)(η5:?-C5H4CH2CH2)Cl> (7).Compound (7) reacts with PMe2Ph giving the cation 5-C5H4Et)(η5;?-C5H4CH2CH2)(PMe2Ph)>+ (8).
