title: The HSSS radical and the HSSS- anion.
abstract: The HS3 radical and the HS3(-) anion, the sulfur analogues of HO3 and HO3(-), have been detected for the first time by mass spectrometric experiments performed in the gas phase. The structural and energetic features of HS3 and HS3(-) have been investigated by ab initio calculations. Both HS3 and HS3(-) are characterized by HSSS open-chain structures, stable toward the dissociation into S2 and HS(0/-). HS3 adds to HS and HS2 as the known HS n species, and HS3(-) is the conjugate base of a strong Brønsted acid, the trisulfane HSSSH.
authors.affiliation: Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
authors.forename: Giulia
authors.initials: G
authors.lastname: de Petris
authors.forename: Antonella
authors.initials: A
authors.lastname: Cartoni
authors.forename: Marzio
authors.initials: M
authors.lastname: Rosi
authors.forename: Anna
authors.initials: A
authors.lastname: Troiani