Substituted Bisphosphanylamines as Ligands in Gold(I) Chemistry – Synthesis and Structures
Abstract
Dimethyl 5-aminoisophthalate, which is a building block of amino-substituted tetralactam macrocycles, was used as ligand in gold(I) chemistry to form model complexes for macrocyclic gold compounds. Reaction of dimethyl 5-aminoisophthalate with chlorodiphenylphosphine gave the diphosphine compound dimethyl 5-[N,N-bis(diphenylphosphanyl)amino]isophthalate (dmbpaip). This compound can further be reacted with [AuCl(tht)] (tht = tetrahydrothiophene) to give the dinuclear complex [Au2Cl2(dmbpaip)]. In contrast, treatment of dmbpaip with [Au(tht)2]ClO4 resulted in the ionic compound [Au2(dmbpaip)2](ClO4)2 in which the cation forms an eight-membered Au2P4N2 heterocycle. In both gold(I) compounds Au⋯Au interactions are observed. All new compounds were characterized by single-crystal X-ray diffraction.
Dr. Dennis Wiedemann
Technical Consultant for Environmental Issues
Chemist · Crystallographer
I hold a doctorate in chemistry and provide advice concerning permits in German immission and water protection law.