Structure and dynamics of the radical cation of ethane arising from the Jahn-Teller and pseudo-Jahn-Teller effects

被引：11

作者：

Jacovella, U. ^{[1
]}

Stein, C. J. ^{[1
]}

Grutter, M. ^{[1
]}

Freitag, L. ^{[1
]}

Lauzin, C. ^{[1
]}

Reiher, M. ^{[1
]}

Merkt, F. ^{[1
]}

机构：

[1] ETH, Lab Phys Chem, CH-8093 Zurich, Switzerland

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2018年 / 20卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

ELECTRON-SPIN-RESONANCE; PHOTOELECTRON-SPECTROSCOPY; RYDBERG STATES; SCF METHOD; SPECTRUM; METHANE; ALKANES; PHOTOIONIZATION; IONIZATION; VALENCE;

D O I：

10.1039/c7cp06907c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The pulsed-field-ionization zero-kinetic-energy photoelectron spectrum of C2H6 has been recorded in the region of the adiabatic ionization threshold. The partially rotationally resolved spectrum indicates the existence of several vibronic states of C2H6+ with less than 600 cm(-1) of internal excitation. The analysis of the rotational structures assisted by ab initio calculations enabled the determination of the adiabatic ionization energy of C2H6 and the investigation of the structure and dynamics of C2H6+ at low energies. The ground state of C2H6+ is found to be a (2)A(g) state of diborane-like structure with strongly mixed (a(1g))(-1) and (e(g))(-1) configurations. The vibrational structure reveals the importance of large-amplitude nuclear motions involving the diborane distortion modes, the C-C stretching motion, and the internal rotation at elongated C-C distances. The spectrum is analyzed in the light of the information obtained in earlier studies of C2H6+ by ab initio quantum chemistry, EPR spectroscopy and photoelectron spectroscopy.

引用

页码：1072 / 1081

页数：10

共 57 条

[1] A simple and efficient CCSD(T)-F12 approximation [J].