Comparison of the Catalytic Activity of Mono‐ and Multinuclear Ga Complexes in the ROCOP of Epoxides and Cyclic Anhydrides
Abstract Tetranuclear Schiff‐base complexes L1–32 Ga4( t‐Bu)81–3 are highly active and selective (>99 %) catalyst in the alternating ring‐opening copolymerization (ROCOP) of epoxides and anhydrides, yielding polyesters with high molecular weights ( M n) and narrow dispersity (Đ). The thermal properties ( T g) of the resulting polyester range from 18 °C to 124 °C and increase with increasing steric bulk or rigidity along the polymer backbone. Comparative studies using structurally related complexes L4 Ga( t‐Bu)24, [L5 GaR2]2(R= t‐Bu5, R=Me6) and L6 Ga( t‐Bu)27 proved that the Ga2 O2 core of catalyst1 is the catalytically active species..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:2022 |
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| Enthalten in: |
European Journal of Inorganic Chemistry - 2022(2022), 3 |
| Beteiligte Personen: |
Ghosh, Swarup [VerfasserIn] |
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| BKL: |
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| Anmerkungen: |
© 2022 Wiley‐VCH GmbH |
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| Umfang: |
11 |
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| doi: |
10.1002/ejic.202101017 |
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| funding: |
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| 520 | |a Abstract Tetranuclear Schiff‐base complexes L1–32 Ga4( t‐Bu)81–3 are highly active and selective (>99 %) catalyst in the alternating ring‐opening copolymerization (ROCOP) of epoxides and anhydrides, yielding polyesters with high molecular weights ( M n) and narrow dispersity (Đ). The thermal properties ( T g) of the resulting polyester range from 18 °C to 124 °C and increase with increasing steric bulk or rigidity along the polymer backbone. Comparative studies using structurally related complexes L4 Ga( t‐Bu)24, [L5 GaR2]2(R= t‐Bu5, R=Me6) and L6 Ga( t‐Bu)27 proved that the Ga2 O2 core of catalyst1 is the catalytically active species. | ||
| 700 | 1 | |a Glöckler, Eduard |4 aut | |
| 700 | 1 | |a Wölper, Christoph |4 aut | |
| 700 | 1 | |a Linders, Jürgen |4 aut | |
| 700 | 1 | |a Janoszka, Nicole |4 aut | |
| 700 | 1 | |a Gröschel, André H. |4 aut | |
| 700 | 1 | |a Schulz, Stephan |4 aut | |
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