HF…Cl2. Bending dynamics of an antihydrogen-bonded van der Waals dimer
摘要:
The PI-bending fundamental of the HF...Cl2 complex has been observed at high resolution near 33 cm-1, yielding a vibrational energy separation and rotational and nuclear quadrupole coupling constants. From these, estimates of the van der Waals stretching and SIGMA-bending frequencies are made, and a quartic-quadratic potential is fit to the data, with a barrier of 48 cm-1 to the linear H-F...Cl-Cl conformation. HF...Cl2 is decidedly quasilinear, and the consequences of the flat theta(HF) bending coordinate are discussed as they relate to the interpretation of recent photo-initiated bimolecular reactions HX...Y2 --> X + Y2 + XY + Y.