Chloro‐nitrosyl‐molybdän‐Komplexe als Epoxidationskatalysatoren. II. Epoxidringöffnungs‐inaktive Katalysatoren

Abstract

Chloro‐nitrosyl Molybdenum Complexes as Epoxidation Catalysts. II. Catalysts Inactive in Epoxide Ring‐opening ReactionChloro‐nitrosyl molybdenum complexes which are active in the epoxidation reaction do not catalyze the consecutive epoxide ring‐opening reaction if the coordinated ligand can form a strong transition metal‐ligand bond. The temperature of the cleavage of the ligand from the central atom obtained by derivatographic measurements characterizes the strength of this bond. The epoxide ring‐opening activity can be demonstrated by the initial reaction rate, by the conversion of the initial epoxide and by the yield of the ring‐opening products 1 and 2 obtained in the reaction of 1, 2‐epoxyoctane with ethanol in chlorobenzene at 100°C. High temperatures of ligand cleavage correspond with low conversions of the initial epoxide, low initial reaction rate and a low ratio of the isomers 2/1.