... JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 26, Issue 23, 1985, Pages 2789–2792. Cover image Cover image. Mechanism of sulfur extrusion from thiirane. ... Received 11 April 1985, Available online 12 March 2001. Abstract. The thermal decomposition of thiirane to olefin is not a first order reaction, and is therefore not a simple chelotropic process. References. ...