Iron carbonyl complex containing bis[2‐(diphenylphosphino)phenyl]ether enhancing efficiency in the palladium‐catalyzed Suzuki–Miyaura reaction |
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| Authors: | Malabika Borah Pradip K Bhattacharyya Pankaj Das |
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| Institution: | 1. Department of Chemistry, Dibrugarh University, , Dibrugarh, 786004 Assam, India;2. Department of Chemistry, Arya Vidyapeeth College, , Guwahati, 781016 Assam, India |
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| Abstract: | The reaction of Fe3(CO)12] with bis2‐(diphenylphosphino)phenyl]ether (DPEphos) in refluxing THF afforded a mononuclear complex, Fe(CO)4(η1‐P‐DPEphos)] (1), as major product and a binuclear complex, Fe2(CO)6(μ‐CO)(μ‐P,P‐DPEphos)] (2), as minor product respectively. The DPEphos ligand acts as a terminal P‐donor in complex 1 and a bridging P,P‐donor in complex 2. Complexes 1 and 2 were characterized by elemental analysis, fast atom bombardment mass spectrometry, FT‐IR, 1H and 31P{1H} NMR spectroscopy. The structure of complex 1 has been tentatively assigned by density functional theory calculations and its analogy with reported complexes. Combination of complex 1 and PdCl2 furnished an active catalyst for the Suzuki–Miyaura cross‐coupling reactions of various aryl halides with arylboronic acids. Interestingly, under the same experimental condition, complex 1/PdCl2 as catalyst showed superior activity over the DPEphos/PdCl2 system. Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | iron carbonyl complexes DPEphos ligand metal‐containing phosphine density functional theory Suzuki– Miyaura reaction |
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