Abstract
Cationic complexes [(diene)Co(η-C6Me6)]+ (diene is buta-1,3-diene (2a), 5-isopropyl-2-methylcyclohexa-1,3-diene (2b), cycloocta-1,3-diene (2c), and cyclohexa-1,5-diene (2d)) were synthesized by the reaction of [Co(η-C6Me6)2]+ (1) with dienes in a CH2Cl2-Me2CO mixture. In the absence of dienes, cation 1 undergoes hydrogenation to form [(1,2,3,4,5,6-HMCD-1,3)-Co(η-C6Me6)]+ (HMCD is hexamethylcyclohexadiene, 2e). Structures [2c–e]PF6 were determined by X-ray diffraction analysis. According to the DFT calculations, the Co-C6H6 bond in the complexes with conjugated dienes is stronger than that in the complexes with nonconjugated dienes.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 44–49, January, 2012.
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Loginov, D.A., Pronin, A.A., Starikova, Z.A. et al. Cationic hexamethylbenzene-diene cobalt complexes. Russ Chem Bull 61, 45–50 (2012). https://doi.org/10.1007/s11172-012-0007-8
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DOI: https://doi.org/10.1007/s11172-012-0007-8