Isolation and structural characterization of 1,5-benzodiazepinium cation in an inorganic-organic hybrid compound [C12H17N2](3)[Bi2Cl9]center dot 2EtOH

摘要

The compound [C12H17N2](3)[Bi2Cl9]center dot 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]center dot 2(2-PrOH) (2), that has been isolated from 2-propanol (instead of ethanol), is isostructural with compound 1. (C) 2010 Elsevier Ltd. All rights reserved.