Synthesis and spectroscopic properties of geminal-bis(tert-butylamino)cyclotriphosphazenes obtained by the reaction of Spiro and ansa phenoxycyclotriphosphazenes with the tert-butylamine and the crystal structure of 4,4 '-bis(tert-butylamino)-2,6 ',6 ',10-tetrachloro-4 ',4 ',6 ',6 '-tetrahydrospyro[12H-dibenzo[d,g]- (1,3,2]dioxaphosphocin-6,2 'lambda(5)-[1,3,5,2,4,6]-triazaphosphorine]

The condensation reactions of partly substituted spiro and ansa phcnoxycyclotriphosphazenes 1 and 2 with tert-butylamine produce disubstituted geminal-bis(tert-butylamino)phenoxycyclotriphosphazene derivatives (3 and 4). The structures of these compounds were characterized by elemental analysis, and IR, H-1-, C-13-, P-31-NMR and mass spectroscopic techniques. Compound 3 was also examined by X-ray crystallography and found to be crystallized in the monoclinic space group P2(1)/n with the unit cell parameters: a = = 10.842(4), b = 9.375(5), c = 29.104(11) angstrom, beta = 99.25(3), V= 2920(2) angstrom(3), D-x = 1.404 g cm(-3).