期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 42, 页码 11214-11217出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201405812
关键词
natural bond orbitals; bond theory; computational chemistry; hydrogen bonds; resonance
Abinitio and hybrid density functional techniques were employed to characterize a surprising new class of H-bonded complexes between ions of like charge. Representative H-bonded complexes of both anion-anion and cation-cation type exhibit appreciable kinetic stability and the characteristic theoretical, structural, and spectroscopic signatures of hydrogen bonding, despite the powerful opposition of Coulomb electrostatic forces. All such anti-electrostatic H-bond (AEHB) species confirm the dominance of resonance-type covalency (charge transfer) interactions over the inessential (secondary or opposing) ionic or dipole-dipole forces that are often presumed to be essential for numerical modeling or conceptual explanation of the H-bonding phenomenon.
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