Hi, Does anybody have informations about the structure of amino- groups involved in pi-systems on the level of ab initio or semiempirical methods? Are they planar or pyramidal and if there is a change in structure when does it take place? ----------------------------------- Andreas Jabs M.-Luther-University Dep. of Chemistry Theoretical Chemistry Group Weinbergweg 16 O-4020 Halle/Saale PF 8 e-mail: c=de;a=dbp;p=uni-halle;ou=chemie;s=jabs ------------------------------------