Configurational and conformational analysis of some fully substituted imidazolidinic compounds: a theoretical study

Configurational and conformational analysis were performed using ab initio and semi-empirical molecular orbital methods in order to obtain structural, electronic and energetic information about three previously synthesized imidazolidine derivatives, namely: 3-benzyl-5-benzylidene-imidazolidine-2,4-dione (5), 3-benzyl-5-benzylidene-2-thioxo-imidazolidine-4-one (6), 5-benzylidene-3-(2-oxo-2-phenyl-ethyl)-2-thioxo-imidazolidine-4-one (7) and other two new proposed imidazolidine derivatives: 3-benzyl-5-benzylidene-4-thioxo-imidazolidine-2-one (8) and 3-benzyl-5-benzylidene-imidazolidine-2,4-dithione (9). Important aspects related to structure activity relationship are highlighted.