TY - JOUR
T1 - Vibrational potential function for diimide, HNNH
AU - Nibler, Joseph W.
AU - Bondybey, Vladimir E.
PY - 1974
Y1 - 1974
N2 - The general valence force field for the in-plane motions of diimide has been determined from a total of 24 vibrational frequencies of HNNH, HNND, DNND, and 15N substituted counterparts. The unusual upward shifts observed for the NN stretching frequency on deuteration can be obtained when these shifts are directly constrained, but an exact fit was not possible due to convergence problems. Most of the force constants are well determined and a comparison is offered with recent results for CH3NNH, CH3NNCH 3, FNNF, and C2H4. The latter force fields suggest that the unobserved torsional frequency of HNNH should lie above 1300 cm-1 and hence this spectral region has been carefully reexamined.
AB - The general valence force field for the in-plane motions of diimide has been determined from a total of 24 vibrational frequencies of HNNH, HNND, DNND, and 15N substituted counterparts. The unusual upward shifts observed for the NN stretching frequency on deuteration can be obtained when these shifts are directly constrained, but an exact fit was not possible due to convergence problems. Most of the force constants are well determined and a comparison is offered with recent results for CH3NNH, CH3NNCH 3, FNNF, and C2H4. The latter force fields suggest that the unobserved torsional frequency of HNNH should lie above 1300 cm-1 and hence this spectral region has been carefully reexamined.
UR - http://www.scopus.com/inward/record.url?scp=0343729075&partnerID=8YFLogxK
U2 - 10.1063/1.1681195
DO - 10.1063/1.1681195
M3 - Article
AN - SCOPUS:0343729075
SN - 0021-9606
VL - 60
SP - 1307
EP - 1312
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 4
ER -