No abstract

Anhydrous H(3)PO(4) reacts in diethylether solution at room temperature with ethoxysilanes to form silicophosphates which contain SiO(6)-units. A single crystal X-ray structure provides evidence for silicophosphate structures comprised of alternating SiO(4)- and PO(4)-tetrahedra as well as SiO(6)-octahedra.

The crystal structure of (2,2'-diazenediyldiphenolato-kappa(3)O,N,O')dimethylsilicon, C(14)H(14)N(2)O(2)Si, determined at four temperatures, reveals a dynamic disorder as a result of a flipping of the orientation of the C-N=N-C unit. The population of the two conformers in the single crystal depends on the temperature and cooling rate. It is possible to minimize the disorder by cooling the crystal slowly.