1,1'-FERROCENE DICHALCOGENATO DERIVATIVES OF OCTACHLORO-CYCLOTETRAPHOSPHAZENE

Mononuclear 1,1'-ferrocenedichalcogenato derivatives of octachloro-cyc lotetraphosphazene, fCE(2)[P4N4Cl6] (E = O (12), S (13), Se (14)), hav e been prepared and characterized by H-1, C-13 and P-31 NMR spectrosco py as well as mass spectrometry.(1)) The molecular structures of 12-14 were determined by X-ray crystallography. While the 1,1'-ferrocene di olato complex, fcO(2)[P4N4Cl6] (12), possesses a 1,3-transannular brid ged structure, the dithiolato and diselenolato analogues, 13 and 14, a re spiro compounds containing 1,3-dichalcogena-2-phospha[3]ferrocenoph ane rings. According to their temperature-dependent NMR spectra, 13 an d 14 are nonrigid molecules above room temperature in solution.