Shape-persistent octanuclear zinc salen clusters: synthesis, characterization, and catalysis |
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Authors: | Haak Robert M Decortes Antonello Escudero-Adán Eduardo C Martínez Belmonte Marta Martin Eddy Benet-Buchholz Jordi Kleij Arjan W |
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Institution: | Institute of Chemical Research of Catalonia (ICIQ), Avenida Pa?sos Catalans 16, 43007 Tarragona, Spain. |
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Abstract: | We describe a selective and template-controlled synthesis of a series of Zn(8) metal complexes based on a bis-nucleating salen ligand scaffold. Our results, a combination of X-ray analysis and solution studies, show that discrete, shape-persistent metal clusters can be prepared in high yield. Their activity in organic carbonate catalysis is a function of the metal-connecting fragment present in the exterior of the cluster complex. The high stability of the clusters has been confirmed by (1)H, (13)C (DEPTQ) and DOSY NMR, gel permeation chromatography, high-performance liquid chromatography, and mass spectrometry. |
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