Structure and electronic spectra of the (ProQuest: Formulae and/or non-USASCII text omitted)

Ab initio calculations are employed for determining structures, spectroscopic parameters and transitions to the excited electronic states of the astrophysical relevant (ProQuest: Formulae and/or non-USASCII text omitted) anion, which is a potential intermediate of chemical processes involving carbon chains and polycyclic aromatic hydrocarbons. Calculations confirm the prominent stability of linear carbon chain anions which guarantees their formation. The lowest doublet potential energy surface of (ProQuest: Formulae and/or non-USASCII text omitted) displays six isomers, whereas in the lowest quartet potential energy surface, a unique minimum energy geometry is found. The most stable form is the linear anion (ProQuest: Formulae and/or non-USASCII text omitted) [PUBLICATION ABSTRACT]