SYNTHESIS, STRUCTURE, AND FLUXIONAL BEHAVIOR OF A DIHYDROSILANE BEARING AN ARYLDIAMINE PINCER LIGAND

[(dimethylamino)methyl]phenyl}dihydrosilyl)benzene (1) was prepared by treatment of the 1,4-bis(trihydrosilyl)benzene with 2 mol equiv of {2 ,6-bis[(dimethylamino)methyl]phenyl}lithium. The X-ray crystal structu re of 1 shows the hexacoordination of the silicon atom, with a geometr y corresponding to a bicapped tetrahedron. Furthermore, the two chelat ing amino groups are in cis disposition to each other. Dynamic solutio n NMR studies have been carried out. Of the two interpretations consid ered, only one is consistent with the solid state structure.