Dynamic NMR studies of restricted arene rotation in the chromiu tricarbonyl thiophene and selenophene complexes

Abstract

Introduction Steric Rotational Barriers Electronic Rotational Barriers DYNAMIC NMR STUDIES OF THE RESTRICTED ROTATION OF THIOPHENES (Th) AND SELENOPHENES (Seln) IN THE Cr(CO)s($-Th) AND Cr(C0)3(q5-Seln) COMPLEXES