ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Reaction of anhydrous zinc chloride with 2,3-thiophenedicarbaldehyde bis(semicarbazone) (2,3BSTCH2) and bis(thiosemicarbazone) (2,3BTSTCH2): Crystal structure of {[C6H5N2S]+[ZnCl3(C6H4N2S)]−} complex

Kusaï Alomar, Magali Allain, Pascal Richomme, and Gilles Bouet

Laboratoire SONAS EA 921, SFR QUASAV 4207, UNAM, Université d’Angers, Faculté de Pharmacie, 16 Bd Daviers, 49045 Angers Cedex 01, France

E-mail: gilles.bouet@univ-angers.fr

Abstract: The reaction of anhydrous zinc chloride with 2,3-thiophenedicarbaldehyde bis(semicarbazone) or 2,3-bis(thiosemicarbazone) leads to the formation of compound {[C₆H₅N₂S]⁺[ZnCl₃(C₆H₄N₂S)]⁻}, where C6H4N2S is thieno[2,3-d]pyridazine, via an elimination-cyclisation reaction of the semicarbazone or the thiosemicarbazone moiety. Crystal structures of thieno[2,3-d]pyridazine and {[C₆H₅N₂S]⁺[ZnCl₃(C₆H₄N₂S)]⁻} are described. 2015 Institute of Chemistry, Slovak Academy of Sciences

Keywords: 2,3-thiophenedicarbaldehyde – thiosemicarbazone – semicarbazone – thieno[2,3-d]pyridazine – crystal structure – cyclisation

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0171

Chemical Papers 69 (12) 1591–1597 (2015)