CHARACTERIZATION OF ZEOLITE-ENCAPSULATED IRON PHTHALOCYANINES AND BUTADIENE HYDROGENATION CATALYZED BY THEIR ELECTRON DONOR-ACCEPTOR COMPLEXES WITH SODIUM

NaY zeolite-encapsulated iron phthalocyanine (FePc) was synthesized from [HFe3(CO)11]- in NaY. The structural properties of FePc in NaY were studied by EXAFS, Mössbauer, FT-IR, and diffuse reflectance UV-VIS. The spectroscopic results suggest that NaY-encapsulated FePc (FePc/NaY) is slightly distorted from the original planar structure of a phthalocyanine molecule due to the intrazeolitic constraint. Electron donor-acceptor (EDA) complex (Na+)4(FePc4-)/NaY was prepared from FePc/NaY by the reaction with sodium-naphthalene (Na+)(C10H8-). They gave a higher trans/cis ratio of 2-butenes in butadiene hydrogenation compared with the EDA complex on the external surface of NaY. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.