Issue 13, 2019

Synthesis of helical aluminium catalysts for cyclic carbonate formation

Abstract

Helical aluminium complexes [Al2X4(μ-nbptam)] (X = Me 1, Et 2), [Al2X4(μ-fbpam)] (R = Me 3, Et 4), [Al3X7(μ-nbptam)] (X = Me 5, Et 6) and [Al3X7(μ-fbpam)] (X = Me 7, Et 8) have been prepared by treatment of scorpionate ligand precursors with two or three equivalents of the corresponding trialkylaluminium derivative. The structures of these complexes have been determined by spectroscopic methods and the X-ray crystal structure of complex 1 has also been established. These complexes have been studied as catalysts for the chemical fixation of carbon dioxide into cyclic carbonates displaying good catalytic activity. When cyclohexene oxide was used as a substrate, polyether–polycarbonate was obtained in a ratio which is highly dependent on the cocatalyst and the catalyst to cocatalyst ratio used.

Graphical abstract: Synthesis of helical aluminium catalysts for cyclic carbonate formation

Supplementary files

Article information

Article type
Paper
Submitted
23 Jan 2019
Accepted
02 Mar 2019
First published
04 Mar 2019

Dalton Trans., 2019,48, 4218-4227

Synthesis of helical aluminium catalysts for cyclic carbonate formation

M. A. Gaona, F. de la Cruz-Martínez, J. Fernández-Baeza, L. F. Sánchez-Barba, C. Alonso-Moreno, A. M. Rodríguez, A. Rodríguez-Diéguez, J. A. Castro-Osma, A. Otero and A. Lara-Sánchez, Dalton Trans., 2019, 48, 4218 DOI: 10.1039/C9DT00323A

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