Isolation and structural characterization of 1,5-benzodiazepinium cation in an inorganic-organic hybrid compound [C < inf > 12 < /inf > H < inf > 17 < /inf > N < inf > 2 < /inf > ] < inf > 3 < /inf > [Bi < inf > 2 < /inf > Cl < inf > 9 < /inf > ]·2EtOH

Abstract

The compound [C12H17N2]3[Bi2Cl9]·2EtOH (1) has been synthesized from bismuth trichloride and o-phenylenediamine (opda) in ethanol at an aerial ambient condition. This preparation includes the conversion of opda to 2,3-dihydro-1H-1,5-benzodiazepinium cation through its reaction with acetone that is formed in situ from aerial ethanol oxidation. Compound 1 crystallizes in triclinic system (space group P-1). In the crystal structure of 1, the supramolecular hydrogen bonding interactions between [Bi2C9]3- and [C12H17N2]+ play an important role in the stabilization of cationic form of 2,3-dihydro-1H-1,5-benzodiazepine and in obtaining emission signals of the organic moiety, which is otherwise not emissive. Compound [C12H17N2]3[Bi2Cl9]·2(2-PrOH) (2), that has been isolated from 2-propanol (instead of ethanol), is isostructural with compound 1. © 2010 Elsevier Ltd. All rights reserved.