Journal
MAGNETIC RESONANCE IN CHEMISTRY
Volume 47, Issue 7, Pages 585-592Publisher
WILEY
DOI: 10.1002/mrc.2433
Keywords
2-fluorobenzamide; hydrogen bonds; solvent effects; spin-spin coupling constants; B3LYP/6-311++G**; AIM
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In 1975 a large number of coupling constants were measured in 2-fluorobenzamide labeled with N-15. Some of them were assigned to couplings through intramolecular N-H center dot center dot center dot F hydrogen bonds (HBs). These couplings change dramatically when CDCl3 is replaced by DMSO-d(6). In this theoretical paper we provide density functional theory (DFT) calculations that justify the existence of a weak HB in the absence of solvent, while solvents that act as HB acceptors break down the intramolecular hydrogen bond (IMHB) of 2-fluorobenzamide. Atoms in molecules (AIM) analyses and Steiner-Limbach plots were used to analyze the structure of the compounds. Copyright (c) 2009 John Wiley & Sons, Ltd.
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