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Original Articles

IMIDOSULFITES CYCLIQUES: SYNTHESE ET ETUDE STRUCTURALE DE CYCLES A 6, 7 ET 8 CHAINONS

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Pages 35-41 | Received 20 Feb 1980, Accepted 28 Mar 1980, Published online: 19 Dec 2006
 

Abstract

Nous décrivons dans ce travail la synthèse et l'étude structurale par spectrométrie de masse, infrarouge, r.m.n. 1H et 13C de quatre exemples d'une nouvelle classe d'hétérocycles: les imidosulfites cycliques. Les composés étudiés sont des cycles à 6, 7 et 8 cha[icaron]nons. La spectrométrie de masse révèle trois modes principaux de rupture. Le domaine de la vibration de valence du groupe S[dbnd]N a pu ětre précisé en infrarouge. La r.m.n. indique enfin que les composés étudiés existent en équilibre entre plusieurs conformations.

Four examples of a new class of heterocycles, the cyclic imidosulfites are reported. Their synthesis, mass spectrometry, infrared, 1H and 13C n.m.r. study is described. The studied compounds are six, seven and eight-membered cycles. Three main fragmentation modes are observed in mass spectrometry; the S[dbnd]N stretching vibration has been found to occur in the 1295–1335 range for CCl4 solutions. The n.m.r. suggests that these heterocycles exists as conformational equilibria between two or more forms.

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