New Synthetic Methodology and Biologically Active Substances |
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Authors: | Colin Eaborn |
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Affiliation: | School of Chemistry and Molecular Sciences, University of Sussex, Brighton BN1 9QJ Great Britain |
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Abstract: | The η5-cyclopentadienyl-η2-propenealkylnickel complexes 4–9 (alkyl CH3, CD3, CH2SiMe3, CH2 CH3, CH2 CH2 CH3 and CH(CH3)2) have been prepared by treating nickelocene (1) with the appropriate organomagnesium halides 2a–2f and propene at ?20 to ?10°C. Temperature dependent 1H-NMR spectra result from rotation of the propene molecule around the nickel—olefin axis; in the case of 4 and 8, two rotamers a and b can be distinguished below ca. ?60°C. The decomposition pathways for 4 and 8 are discussed. |
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