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Supported -Complexes of LiC Bonds from Coordination of Monomeric Molecules of LiCH3, LiCH2CH3 and LiC6H5 to MoMo Bonds Pérez Jiménez, Marina Campos, Jesús Jover Modrego, Jesús Álvarez, Santiago (Álvarez Reverter) Carmona Guzmán, Ernesto Compostos de coordinació Compostos organometàl·lics Compostos de metalls de transició Espectroscòpia de ressonància magnètica nuclear Coordination compounds Organometallic compounds Transition metal compounds Nuclear magnetic resonance spectroscopy LiCH3 and LiCH2CH3 react with the complex [Mo2(H)2(μ-AdDipp2)2(thf)2] (1⋅thf) with coordination of two molecules of LiCH2R (R=H, CH3) and formation of complexes [Mo2{μ-HLi(thf)CH2R}2(AdDipp2)2], 5⋅LiCH3 and 5⋅LiCH2CH3, respectively (AdDipp2=HC(NDipp)2; Dipp=2,6-iPr2C6H3; thf=C4H8O). Due to steric hindrance, only one molecule of LiC6H5 adds to 1⋅thf generating the complex [Mo2(H){μ-HLi(thf)C6H5}(μ-AdDipp2)2], (4⋅LiC6H5). Computational studies disclose the existence of five-center six-electron bonding within the H−Mo≣Mo−C−Li metallacycles, with a mostly covalent H−Mo≣Mo−C group and predominantly ionic Li−C and Li−H interactions. However, the latter bonds exhibit non-negligible covalency, as indicated by X-ray, computational data and the large one-bond 6,7Li,1H and 6,7Li,13C NMR coupling constants found for the three-atom H−Li−C chains. By contrast, the phenyl group in 4⋅LiC6H5 coordinates in an η2 fashion to the lithium atom through the ipso and one of the ortho carbon atoms. 2022-04-11T09:48:01Z 2022-04-11T09:48:01Z 2021-12-01 2022-04-11T09:48:01Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1433-7851 https://hdl.handle.net/2445/184934 718767 eng eng Reproducció del document publicat a: https://doi.org/10.1002/anie.202116009 Angewandte Chemie-International Edition, 2021, vol. 61, num. e20211600 https://doi.org/10.1002/anie.202116009 cc by (c) Pérez Jiménez, Marina et al., 2021 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess 10 p. application/pdf Wiley-VCH Articles publicats en revistes (Química Inorgànica i Orgànica)