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Title: | Supported -Complexes of LiC Bonds from Coordination of Monomeric Molecules of LiCH3, LiCH2CH3 and LiC6H5 to MoMo Bonds |
Author: | Pérez Jiménez, Marina Campos, Jesús Jover Modrego, Jesús Álvarez, Santiago (Álvarez Reverter) Carmona Guzmán, Ernesto |
Keywords: | 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 |
Issue Date: | 1-Dec-2021 |
Publisher: | Wiley-VCH |
Abstract: | 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1002/anie.202116009 |
It is part of: | Angewandte Chemie-International Edition, 2021, vol. 61, num. e20211600 |
URI: | http://hdl.handle.net/2445/184934 |
Related resource: | https://doi.org/10.1002/anie.202116009 |
ISSN: | 1433-7851 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
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