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Azolylborane adducts. Structural and conformational analysis by x‐ray diffraction and NMR. Protic‐hydric (CH δ+ ‐ δ– HB) and Protic‐Fluoride (CH δ+ ‐ δ– FB) interactions
Author(s) -
PadillaMartińez Itzia Irene,
RosalezHoz Maria De Jesús,
Tlahuext Hugo,
CamachoCamacho Carlos,
ArizaCastolo Armando,
Contreras Rosalinda
Publication year - 1996
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19961290413
Subject(s) - chemistry , pyridine , adduct , disproportionation , imidazole , tetrahydrofuran , x ray crystallography , pyrrole , crystallography , dimer , nuclear magnetic resonance spectroscopy , lewis acids and bases , cycloheptatriene , stereochemistry , medicinal chemistry , diffraction , physics , organic chemistry , solvent , optics , catalysis , biochemistry
The preparation, NMR and X‐ray diffraction studies of a series of azolylboron hydrides derived from pyrrole, indole, and carbazole coordinated with tetrahydrofuran, pyridine, and imidazole are reported. The azolyl substituents are very electroattractive leading to an acidic boron atom which strongly coordinates with the Lewis bases. The stabilization of the BH 2 groups against disproportionation could be explained in terms of the interactions found between the acidic hydrogen atoms of the heterocycles (CH δ+ acceptor) and the hydrides (BH δ– donors).