Noorisafa Z, Sabzyan H, Keshavarz E. Metastable excited states of OBr2- and OCl2- dianions.
SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014;
132:672-677. [PMID:
24907970 DOI:
10.1016/j.saa.2014.05.012]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 02/21/2014] [Accepted: 05/08/2014] [Indexed: 06/03/2023]
Abstract
Electronic stabilities, structures, properties, and spectroscopic constants of the halogen oxide dianions OBr2- and OCl2- and their singly charged anions which are of astrophysical and laboratory interests have been studied. The X2Σ states of OBr2- and OCl2- are metastable with PECs having smooth wells with minima located at R=1.859 Å and 1.776 Å, and Coulomb barriers of 40402.54987 cm(-1) and 43746.63462 cm(-1) heights located at RRCB=2.100 Å and 1.922 Å, respectively, both without any vibrational states. While, the B2Σ state of OBr2- and the A2Σ state of OCl2- are metastable with PECs having wells deep enough to suite several bound states, with minima located at Re=1.773 Å and 1.6430 Å, and Coulomb barriers of 191437.45813 cm(-1) and 180550.70294 cm(-1) heights located at RRCB=2.658 Å and 2.4480 Å, with De=1.26470 eV and 1.60837 eV, respectively. The OBr- and OCl- singly charged anions are stable in their ground states. Based on the calculated Frank-Condon factors, it is concluded that metastable excited state OBr2- and OCl2- dianions and ground state OBr- and OCl- singly charged anions can be formed via electron capture processes.
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