Ph[PhC(O)NH]2PyNC(O)Ph: a new mesomeric stabilized azaylide. Synthesis, crystal structure and IR spectroscopic results

The structure of Ph[PhC(O)NH]2PyNC(O)Ph (2) in solid state and in solution is discussed on the basis of a crystal structure analysis and IR and Raman spectra. In crystalline state 2 forms dimers which are associated via two pairs of bifurcated (N–H)2· · ·OyC hydrogen bonds. The spectroscopic data are in good agreement with the crystallographic results with respect to the hydrogen bonding and they suggest that 2 also in solution is associated. q 2003 Elsevier B.V. All rights reserved.