Carbon-13 nuclear magnetic resonance spectra of polychloro- and polybromo-benzenes

Takeuchi, Yoshito; Furuyama, Hideichi; Fukushi, Sachio; Fujiwara, Shizuo

doi:10.1039/p29850000175

Cited by 14 publications

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“…In contrast, both [Li][ 1 ] and [Li][ 2 ] completely decompose in [D 8 ]THF over this time frame (Figure S15). Prolonged exposure of [Li][ 2 ] to vacuum also results in significant decomposition, as evidenced by the observation of pentachlorobenzene (C 6 Cl 5 H) resonances in its 13 C{ 1 H} spectrum (Figure S15) [39] . We surmise that the good thermal stability of [Li][ 1 ] in [D 6 ]benzene is partly a consequence of poor reducing ability of the [C 6 Cl 5 ] − ligand; however, the o ‐chloro substitution also likely imparts increased kinetic stabilization relative to non‐chlorinated aryl ligands, which can undergo facile ortho ‐CH activation [40, 41] …”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of Two Uranyl‐Aryl “Ate” Complexes

Ordoñez

Autschbach

et al. 2021

Chemistry A European J

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Reaction of [UO2Cl2(THF)3] with 3 equivalents of LiC6Cl5 in Et2O resulted in the formation of first uranyl aryl complex [Li(Et2O)2(THF)][UO2(C6Cl5)3] ([Li][1]) in good yields. Subsequent dissolution of [Li][1] in THF resulted in conversion into [Li(THF)4][UO2(C6Cl5)3(THF)] ([Li][2]), also in good yields. DFT calculations reveal that the U−C bonds in [Li][1] and [Li][2] exhibit appreciable covalency. Additionally, the 13C NMR chemical shifts for their Cipso environments are strongly affected by spin‐orbit coupling—a consequence of 5f orbital participation in the U−C bonds.

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Section: Methodsmentioning

confidence: 99%