Theoretical spectroscopic characterization at low temperatures of methyl hydroperoxide and three S-analogs

9 pags.; 3 figs.; 6 tabs.© 2015 AIP Publishing LLC. The low temperature spectra of the detectable species methyl hydroperoxide (CH3OOH) and three sulfur analogs, the two isomers of methanesulfenic acid (CH3SOH and CH3OSH) and the methyl hydrogen disulfide (CH3SSH), are predicted from highly correlated ab initio methods (CCSD(T) and CCSD(T)-F12). Rotational parameters, anharmonic frequencies, torsional energy barriers, torsional energy levels, and their splittings are provided. Our computed parameters should help for the characterization and the identification of these organic compounds in laboratory and in the interstellar medium.This research was supported by the MINECO of Spain Grant No. FIS2013-40626-P and by a Marie Curie International Research Staff Exchange Scheme Fellowship within the 7th European Community Framework Program under Grant No. PIRSES-GA-2012-31754. The authors acknowledge the COST Actions CM1002 CODECS and CM1401 “Our Astrochemical History.” The authors acknowledge the CTI (CSIC) and CESGA for computing facilities.Peer Reviewe