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2,6-Dihy-droxy-4-oxo-2-(pyridin-1-ium-3-yl)-4H-1,3,2-benzodioxaborinin-2-ide 0.67-hydrate.

ABSTRACT: The asymmetric unit of the title compound, C12H10BNO5·0.67H2O, contains three independent pyridinylboronic acid esters adopting zwitterionic forms and two water mol-ecules. The six-membered heterocyclic rings in the boronic esters have half-chair conformations and the deviations of the B atoms from the boronate mean planes range from 0.456?(3) to 0.657?(3)?Å. All of the B atoms have tetra-hedral coordination environments, with B-O and B-C bond lengths of 1.446?(4)-1.539?(3) and 1.590?(5)-1.609?(5)?Å, respectively. In the crystal, the ester and water mol-ecules are linked into a three-dimensional network by a large number of O-H?O, N-H?O and C-H?O hydrogen bonds. The crystal packing is further accomplished by ?-? inter-actions, with centroid-centroid distances of 3.621?(4)-3.787?(4)?Å.

SUBMITTER: Garcia-Grajeda BA

PROVIDER: S-EPMC3998600 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature

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2,6-Dihy-droxy-4-oxo-2-(pyridin-1-ium-3-yl)-4H-1,3,2-benzodioxaborinin-2-ide 0.67-hydrate.

Garcia-Grajeda Blanca A BA Höpfl Herbert H Guerrero-Alvarez Jorge A JA Campos-Gaxiola José J JJ Cruz-Enríquez Adriana A

Acta crystallographica. Section E, Structure reports online 20140305 Pt 4

The asymmetric unit of the title compound, C12H10BNO5·0.67H2O, contains three independent pyridinylboronic acid esters adopting zwitterionic forms and two water mol-ecules. The six-membered heterocyclic rings in the boronic esters have half-chair conformations and the deviations of the B atoms from the boronate mean planes range from 0.456 (3) to 0.657 (3) Å. All of the B atoms have tetra-hedral coordination environments, with B-O and B-C bond lengths of 1.446 (4)-1.539 (3) and 1.590 (5)-1.609 ( ...[more]

PMID: 24826112

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