Ethene Dimerization on Zeolite-Hosted Ni ions: Reversible Mobilization of the Active Site

Like a balloon on a string: the active site for ethene dimerization in Ni(II)-zeolites is a mobile complex resembling a homogeneous catalyst, tethered by Coulomb interaction to the framework. The complexes are created in situ by coordination of ethene to Ni and lead to second order rate dependence on ethene pressure. Dimerization occurs by the Cossee-Arlman mechanism through transition states having the favoured square-planar coordination of Ni.

R. Brogaard, M. Kømurcu, M. Dyballa, A. Botan, V. Van Speybroeck, U. Olsbye, K. De Wispelaere

ACS Catalysis

9, 5645−5650

2019

A1

DOI

https://doi.org/10.1021/acscatal.9b00721