Dear Members! It seems there are problems with using the the IR-room and IR- equipment. Everybody who has to use the IR, should tell me one hour bevore. Than I will attend you and have a look at the kind of using the IR. I ask you for some understanding. Christina Christina Houben RWTH Aachen Institut für Anorganische Chemie (IAC) Landoltweg 1 D-52074 Aachen