Synthesis, spectral characterization and crystal structures of organophosphonic diamides: pyramidal nitrogen centers and hydrogen bonding in [PhP(O)(NH<sup>t</sup>Bu)<sub>2</sub>], [PhP(O)(NHDipp)<sub>2</sub>] (Dipp = 2,6-<sup>i</sup>Pr<sub>2</sub>C<sub>6</sub>H<sub>3</sub>) and [<sup>t</sup>BuP(O)(NH<sup>i</sup>Pr)<sub>2</sub>]
作者:Ramaswamy Murugavel、Ramasamy Pothiraja
DOI:10.1039/b300035d
日期:——
characterized by elemental analysis and by IR, EI mass and NMR (1H and 31P) spectroscopy. The molecular structures of [PhP(O)(NHtBu)2] (1), [PhPO(NHDipp)2] (2) and [tBuP(O)(NHiPr)2] (7) have been determined by single crystal X-ray diffraction studies. The amido nitrogen atoms in 1, 2 and 7 show considerable deviation from the expected trigonal-planar geometry. The observed dihedral angles and the orientation