The synthesis, characterization, and alkylation of nacnac chromium triflate derivatives |
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| Authors: | John F. Young |
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| Affiliation: | Department of Chemistry and Biochemistry, Center for Catalytic Science and Technology’, University of Delaware, Newark, DE 19716, USA |
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| Abstract: | A Cr(III) triflate coordinated by the bulky β-diketiminate MeLiPr (MeLiPr = 2,4-pentane N,N′-bis(2,6-diisopropylphenyl)diketiminate) was synthesized from the corresponding bridging iodide complex [MeLiPrCr(μ-I)]2 by ligand substitution and subsequent oxidation with silver triflate (AgOTf). MeLiPr CrIII(OTf)2 exhibits rare trigonal bipyramidal geometry about Cr(III). Attempts to alkylate this triflate synthon with 1,4-dilithiobutane (Li(CH2)4Li) led to reduction, while reaction with dimethylzinc (ZnMe2) led to a mono-alkylated product; only the reaction with methyl lithium (MeLi) was successful in generating a dialkyl. |
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| Keywords: | Chromium Triflates β-Diketiminates Lithium alkyls Alkylation |
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