Intermolecular C-F...H-C contacts in the molecular packing of three isostructural N-(fluorophenyl)mannopyranosylamines.

Among the three compounds reported here, namely N-(4-fluorophenyl)-β-D-mannopyranosylamine, (I), N-(3-fluorophenyl)-β-D-mannopyranosylamine, (II), and N-(2-fluorophenyl)-β-D-mannopyranosylamine, (III), all with chemical formula C(12)H(16)FNO(5), (I) and (II) are isostructural, whereas (III) assumes the same packing arrangement as the unfluorinated analogue N-phenyl-β-D-mannopyranosylamine, (IV), which has been reported previously. Similarities with respect to the intermolecular hydrogen-bonding patterns exist across the series (I)-(III). A packing motif that distinguishes the shared packing arrangement of (I) and (II) from that of (III) is a C-F.

Safety and efficacy of a protocol using bougienage or endoscopy for the management of coins acutely lodged in the esophagus: a large case series.

Study Objective: We report our experience using the bougienage procedure in the management of esophageal coins.

Methods: Observational case series of all patients presenting to our emergency departments with coins acutely lodged in the esophagus between 1994 and 2006. All patients were treated according to our protocol with either endoscopy or bougienage.