Investigation of the Photochemical Behaviour of Tricarbonyl(cyclopentadienyl)manganese Derivatives with Carbamate Groups

Photochemical properties of cymantrene carbamates were for the first time investigated. It was found that UV irradiation of Boc-substituted 1-aminoalkylcymantrenes yields dicarbonyl chelate complexes as a result of the coordination of the oxygen atom of the carbamate ligand to the manganese atom. These complexes show high thermodynamic and kinetic stability in solution at room temperature and in closed systems can be used for the creation of photochromic systems based on cymantrene carbamates. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)