FTIR Spectra of Cyanamide Complexes with Hydrogen Fluoride in Solid Argon

Article abstract of DOI:10.1021/j100295a021

Cyanamide vapor was condensed at 12 K with HF in excess argon producing a 1:1 complex of the form H2NCN--HF.The HF submolecule stretching fundamental was observed at 3458 cm^-1, and the HF librational modes appeared at 694 and 686 cm^-1, which are very similar to the HF modes observed for the CH3CN--HF complex.Several perturbed submolecule modes of cyanamide in the 1:1 complex were identified; large perturbations for the CN stretch at 2306 cm^-1 and the N-C stretch at 1113 cm^-1 and a small blue shift for the NH2 wag at 427 cm^-1 support bonding of HF to the nitrile nitrogen.Increasing of the HF concentration favored a 1:2 complex H2NCN--(HF)2 with two HF stretching modes appropriate for an open chain structure.