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Issue 20, 2014
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Di-magnesium and zinc catalysts for the copolymerization of phthalic anhydride and cyclohexene oxide

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Abstract

Two new homogeneous dinuclear catalysts for the ring-opening copolymerization of phthalic anhydride (PA)/cyclohexene oxide (CHO) and the terpolymerization of phthalic anhydride (PA)/cyclohexene oxide (CHO)/carbon dioxide (CO2) are reported. The catalysts are a di-magnesium (1) and a di-zinc complex (2), both are coordinated by the same macrocyclic ancillary ligand. Both catalysts show good polymerization control and activity (TOF = 97 (1) and 24 (2) h−1), with the di-magnesium complex (1) being approximately four times faster compared to the di-zinc (2) analogue. Their relative reactivity is closely related to that observed for well documented chromium salen/porphyrin catalysts. However, these results represent the first example of a well-defined magnesium catalyst which may be advantageous in terms of obviating use of co-catalysts, low cost, lack of colour and redox chemistry.

Graphical abstract: Di-magnesium and zinc catalysts for the copolymerization of phthalic anhydride and cyclohexene oxide

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The article was received on 27 May 2014, accepted on 27 Jun 2014 and first published on 15 Jul 2014


Article type: Paper
DOI: 10.1039/C4PY00748D
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Polym. Chem., 2014,5, 6068-6075
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    Di-magnesium and zinc catalysts for the copolymerization of phthalic anhydride and cyclohexene oxide

    P. K. Saini, C. Romain, Y. Zhu and C. K. Williams, Polym. Chem., 2014, 5, 6068
    DOI: 10.1039/C4PY00748D

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