Structure of Homoleptic CuI(CO)3 Cations in CuI-Exchanged ZSM-5 Zeolite: An X-ray Absorption Study

Interaction with the zeolitic walls changes the structure of zeolite-encapsulated CuI(CO)3 cations (see picture), which were synthesized in situ by treating CuI-ZSM-5 zeolite with CO at 80 K, from the planar D3h form, typical of homogeneous analogues such as [Cu(CO)3]+AsF6−, to a C3v-symmetric bent form. This conclusion was drawn on the basis of fine-structure and near-edge X-ray adsorption spectra, supported by IR spectroscopic data.