Tetrakis(2-fluorophenylamino)silane and its first product of condensation N-(2-fluorophenyl)-Si,Si,Si,Si',Si',Si'-hexakis(2-fluorophenylamino)disilazane. Syntheses and crystal structures

The synthesis and crystal structure determination of silanetetramine N,N',N '',N'''2-fluorophenyl(C2/c; a = 16.771(7) Angstrom, b = 16.827(5) Angstrom, c = 16.753(6) Angstrom, B = 111.00(2)degrees, z = 8) are reported. In a search for suitable condensation pathways to silicon/nitrogen based porous solids N-(2-fluorophenyl)-Si,Si,Si,Si'Si'Si'-hexakisi (2-fluorophenylamino)disilazane (2) has been obtained from the ammonium carbamate catalyzed condensation of the silanetetramine in teflon lined autoclaves. The X-ray crystal structure determination (P (1) over bar; a = 9.331(1) Angstrom, b = 13.698(5) Angstrom, c = 16.164(4) Angstrom, alpha = 90.34(2)degrees, beta = 103.03(2)degrees, gamma = 103.04(3)degrees, Z = 2) shows the disilazane to be a dimer formed by linear condensation from the monomeric silazane.