Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 107, Issue 41, Pages 8723-8729Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp030554z
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Methyl pyrrole-2-carboxylate (MPC), pyrrole-2-carbaldehyde (PC), methyl N-methylpyrrole-2-carboxylate (MPC-NMe), and N-methylpyrrole-2-carbaldehyde (PC-NMe) are investigated. Experimental and theoretical IR spectra and density-functional theory calculations concerning energetic and geometrical properties of molecular structures show that for all species s-cis conformers are more stable than s-trans ones. The existence of intramolecular N-(HO)-O-... hydrogen bonds for s-cis conformers of MPC and PC is controversial; the topological analysis based on Bader theory shows that such hydrogen bonds do not exist.
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