2-Aminobenzothiazole phosphorus amides: Molecular and supramolecular structures, hydrogen bonds and sulfur donor–acceptor interactions
作者:Zureima García-Hernández、Angelina Flores-Parra、Jean Michel Grevy、Ángel Ramos-Organillo、Rosalinda Contreras
DOI:10.1016/j.poly.2005.11.018
日期:2006.5
Nine phosphorus amides derived from 2-aminobenzothiazole (1): 2-aminobenzothiazole-diphenylphosphane (2) and their corresponding oxide (4), sulfide (5), and selenide (6), and 2-aminobenzothiazole-diethylphosphite (3), and their corresponding sulfide (7), and selenide (8), lithium 2-aminobenzothiazolide-diphenylphosphane (9) and its oxide (10) are reported. Preferred tautomers and conformers of 2-10 in solution have been identified using NMR spectroscopy. Oxidation of 2 and 3 produces 4-8 associated with migration of the anilinic proton to the endocyclic nitrogen leading a delocalized dienyl system. Migration of phenyl groups from 2 and chlorides from NHEt3Cl to Pb(NO3)(2) afforded bis-(2-aminobenzothiazolium) tetrachloro-diphenyl plumbate (11). The X-ray diffraction structures obtained for 2, 7, 10 and 11 showed S center dot center dot center dot H-Ar, S center dot center dot center dot S, S center dot center dot center dot P, and S center dot center dot center dot Cl donor acceptor interactions in the solid state, and that compounds 2 and 7 form dimers by 6 and 4 intermolecular cooperative hydrogen bonds. New compounds were characterized by NMR, IR, mass spectrometry and elemental analyses. (C) 2005 Elsevier Ltd. All rights reserved.