1437307-53-3Relevant academic research and scientific papers
The spectroscopy and structure of new 1,3,2-diazaphospholes and 1,3,2-diazaphosphorinanes
Oroujzadeh,Gholivand,Shariatinia
, p. 183 - 191 (2013)
New 1,3,2-diazaphospholes and 1,3,2-diazaphosphorinanes with formula 2,4-Cl2-C6H3-C(O)NHP(O)X where X = (1), (2), (3), and (4) were synthesized and characterized by 1H, 13C, 31P NMR, IR spectroscopy, and elemental analysis. The 31P NMR spectra revealed that the phosphorus atoms are more deshielded in the diazaphospholes than in the diazaphosphorinanes. The 13C NMR spectrum of 2 indicated that 2JPC(aliphatic) = 14.2 Hz for the endocyclic carbon atom is larger than that for the exocyclic CH3 carbon atom (5.2 Hz). Furthermore, for diazaphosphorinanes, 3JPC(aliphatic) ≈ 2 × 2JPC(aliphatic). The molecular structure of compound 2 was determined by X-ray crystallography. In this structure, a centrosymmetric dimer is formed via connection of two molecules by strong intermolecular N-HcccO hydrogen bonds. The presence of weak intermolecular C-HcccO and C-HcccCl hydrogen bonds creates a three dimensional polymeric chain in the crystal lattice.
