title: Isomers of disulfur dinitride, S2 N2.
abstract: UV photolysis (λ=248 or 255 nm) of cyclic S2 N2 isolated in solid argon matrices yields two open-shell S2 N2 isomers, trans SNSN ((3) A'') and cis SNSN ((3) A''), as well as a closed-shell C2v dimer (SN)2 ((1) A1 ). These novel isomers have been characterized by their IR spectra and mutual photo-interconversion reactions. Quantum chemical calculations support the experimental results and also provide insight into the complex potential energy surface of S2 N2 .
authors.affiliation: The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China). xqzeng@suda.edu.cn.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Zeng
authors.forename: Andrea
authors.initials: A
authors.lastname: Flores Antognini
authors.forename: Helmut
authors.initials: H
authors.lastname: Beckers
authors.forename: Helge
authors.initials: H
authors.lastname: Willner
keywords: IR spectroscopy; disulfur dinitride; matrix isolation; photochemistry; sulfur-nitrogen compounds