A combined experimental and theoretical study of metallic salts of thiapentadienyl, sulfinylpentadienyl and butadienesulfonyls

Alternative methods for the synthesis of acyclic salts of thiapentadienyl (CH2CHCHCHS)M [M = K, 1(K); Na, 1(Na); Li, 1(Li)], sulfinylpentadienyl (CH2CHCHCHSO)M [M = K, 2(K); Na, 2(Na)] and butadienesulfonyl (CH2CHCHCHSO2)M [M = K, 3(K); Na, 3(Na); Li, 3(Li)] are described, as a result of the activation of C-S bond in dihydrothiophenes by deprotonation with different bases. A theoretical study shows that electronic and geometrical properties are in good agreement with the experimental findings.