Abstract
N-(3-Thenoyl)fluorosulfonimide, ( 1), C 4H 3SC(O)N(H)SO 2F, was prepared by the reaction of 3-thenoic acid with fluorosulfuryl isocyanate in acetonitrile solution. The new compound is a moderately strong nitrogen acid having a pK a of 2.4. Single-crystal X-ray structural analysis of ( 1) shows a pattern of strong intermolecular hydrogen-bonding, resulting in the formation of linear chains. ( 1) is electroinactive over a range of 2 V but undergoes hydrogen reduction ( E p / 2 c = − 0.28 V ). The salt of ( 1) with TBA +, 2, has been prepared and its crystal structure determined. The new dithienyl compound, bis(2-thienyl)imide, 3, has been prepared and crystallographically characterized. The polymers of 1, 3, and a polymer containing the fluorosulfonimide group formed from a copolymer of 3-methylthiophene/3-thiophene carboxylic acid are also reported.
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