6287-40-7Relevant articles and documents
Synthesis, spectroscopic characterization and crystal and molecular structures of phenylphosphonato SnR3 (R=Ph, Me) derivatives
Diop, Tidiane,Diop, Libasse,Kociok-Kohn, Gabriele,Molloy, Kieran C.,Ardisson, Jose Domingos
, p. 29 - 34 (2013/05/22)
Four new phenylphosphonato SnR3 (R=Ph, Me) derivatives have been synthesized and characterized by infrared and Moessbauer spectroscopy. The structure of catena-poly[PhPO3HSnMe3]n has been determined by single-crystal X-ray diffraction analysis. The SnIV atoms are five-coordinated in all compounds, with the SnC3O 2 framework in a trans trigonal bipyramidal arrangement and the PhPO3H- anions being in axial positions. The molecular structure of [PhPO3HSnMe3]n is arranged as a one-dimensional coordination polymer in which planar SnMe3 groups are axially bridged by -O-P-O- linkages of the PhPO3H- ligand. Neighboring chains are linked via O-H...O hydrogen bond interactions, generating a layered structure. In the R2NH 2(PhPO3H)2SnR′3 (R=Cy, Bu; R′=Ph, Me), the SnPh3 or SnMe3 residue is axially coordinated by two monodentate PhPO3H-. The role of the dialkylammonium cation, R2NH2+, is crucial in the lattice building via a hydrogen bond network. These hydrogen bonds contribute to the crystal stability and compactness and result in a three-dimensional arrangement. The aqua complex PhPO3(SnPh 3)2·2H2O has a discrete structure and the anion PhPO32- behaves as a bidentate ligand.
Thermochemical properties of chelates of di-n-butyldithiocarbamate with phosphorus-group elements
Airoldi, Claudio,Souza, Antonio G. de
, p. 283 - 292 (2007/10/02)
The standard molar enthalpies of formation of crystalline tris(di-n-butyldithiocarbamato)E(III), (E = P, As, Sb, or Bi), determined at 298.15 K by solution-reaction calorimetry, are -(705.5 +/- 7.3), -(443.1 +/- 5.4), -(526.2 +/- 2.5), and -(530.7 +/- 5.5) kJ*mol-1, respectively.The enthalpies of sublimation: (136 +/- 3), (128 +/- 3), (179 +/- 3), and (202 +/- 3) kJ*mol-1, were estimated.From the enthalpies of formation of the gaseous complexes, the homolytic and heterolytic mean standard molar element-sulphur bond enthalpies were calculated.These values are correlated with element-sulphur bond distances, and a larger phosphorus- sulphur bond enthalpy reflects a better overlap of d orbitals in bonding formation.
Conversion of 2-dialkylamino-3H-azepines into epsilon caprolactams
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, (2008/06/13)
This invention relates to a process of catalytically converting nitrobenzene to 2-amino-3H-azepines by the reaction of the nitrobenzene with trisaminophosphine and an amine of the formula HNR'2, where R' is lower alkyl containing 1 to 6 carbon atoms. In addition, this invention concerns the catalytic hydrogenation of 2-amino-3H-azepine to epsilon caprolactam.