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Cyclopentadienylcycloheptatrienylmetal compounds of zirconium, niobium, molybdenum and chromium

1974; Elsevier BV; Volume: 81; Issue: 3 Linguagem: Inglês

10.1016/s0022-328x(00)88206-6

1872-8561

H. O. VAN OVEN, C. J. GROENENBOOM, H. J. DE LIEFDE MEIJER,

Ferrocene Chemistry and Applications

The synthesis properties of the compounds (C5H5)M(C7H7) with M = Zr and Nb are described. The Zr compounds is diamagnetic; its PMR spectrum shows two singlets with intensities in the ratio of 7/5; the niobium compound has one unpaired electron per molecule. The IR and mass spectra of the compounds are discussed. The mass spectra show a rearrangement of the parent ion to the dibenzenemetal ion. The properties of the compounds indicate that they have a sandwich structure. Improved syntheses of the compounds (C5H5)M(C7H7 with M = Cr and Mo are also reported.