title: Two isostructural carbamates: the o-tolyl N-(pyridin-3-yl)carbamate and 2-bromo-phenyl N-(pyridin-3-yl)carbamate monohydrates.
abstract: The title carbamate monohydrates, C13H12N2O2·H2O and C12H9BrN2O2·H2O, form isomorphous crystals that are isostructural in their primary hydrogen-bonding modes. In both carbamates, the primary hydrogen bonding and aggregation involves cyclic amide-water-pyridine moieties as (N-H⋯O-H⋯N)2 dimers about inversion centres [as R 4 (4)(14) rings], where the participation of strong hydrogen-bonding donors and acceptors is maximized. The remaining water-carbonyl O-H⋯O=C inter-action extends the aggregation into two-dimensional planar sheets that stack parallel to the (100) plane. The Br derivative does not participate in halogen bonding. A weak intra-molecular C-H⋯O hydrogen bond is observed in each compound.
authors.affiliation: School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
authors.forename: Pavle
authors.initials: P
authors.lastname: Mocilac
authors.affiliation: School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
authors.forename: John F
authors.initials: JF
authors.lastname: Gallagher
keywords: carbamate; crystal structure; hydrate; hydrogen bonding; isostructural; pyridine