Ta. Modro et E. Vuorinen, CHEMISTRY AND STRUCTURE OF THIOPHENIUM S,C-YLIDES, Phosphorus, sulfur and silicon and the related elements, 74(1-4), 1993, pp. 449-450
Thiophenium S,C-ylides were prepared from substituted thiophenes and d
icarbonyldiazocompounds and their rearrangements were studied. NMR stu
dies indicate restricted rotation about the ylidic bond.