Reactions of nickelocene with lithium and magnesium alkyls containing β-hydrogen atoms |
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| Authors: | Stanis&#x aw Pasynkiewicz, Antoni Pietrzykowski, Lidia Trojanowska, Piotr Sobota,Lucjan Jerzykiewicz |
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| Affiliation: | Stanisław Pasynkiewicz, Antoni Pietrzykowski, Lidia Trojanowska, Piotr Sobota,Lucjan Jerzykiewicz |
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| Abstract: | The reaction of nickelocene with BrMgR, where R=CH2CH(CH3)C6H5, C2H5, (CH2)7CH3 and CH2CH2CH3, have been studied. It was found that the presence of β-hydrogen in R did not cause the total splitting of the carbon–nickel bond but alkylidynetrinickel clusters were formed. It is the first example of the synthesis of alkylidynetrinickel clusters (NiCp)3CR′ from the organonickel species possessing β-hydrogen. Besides trinickel clusters, the following compounds were always formed in all the studied reactions: (NiCp)4H2, (NiCp)6, CpNi(η3-C5H7) and (NiCp)2(μ-C5H6). The structure of (NiCp)3CCH(CH3)Ph has been determined by a single-crystal X-ray diffraction study. |
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| Keywords: | Cyclopentadienylnickel clusters Nickel β -H elimination |
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