Synthesis and characterization of water-soluble palladium(II)-functionalized diphosphine complexes |
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| Authors: | Mahmoud Sunjuk Mousa Al-Noaimi Ghassan Abu Sheikha Ekkehard Lindner Bassam El-Eswed Kamal Sweidan |
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| Affiliation: | 1. Chemistry Department, Faculty of Science, The Hashemite University, P.O. Box 150459, Zarka 13133, Jordan;2. Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany;3. Zarka University College, Al-Balqa Applied University, P.O. Box 313, Zarka, Jordan;4. Faculty of Pharmacy, Al-Zaytoonah University of Jordan, P.O. Box 130, Amman, Jordan |
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| Abstract: | Water-soluble functionalized bis(phosphine) ligands L (a–h) of the general formula CH2(CH2PR2)2, where for a: R = (CH2)6OH; b–g: R = (CH2)nP(O)(OEt)2, n = 2–6 and n = 8; h: R = (CH2)3NH2 ( Scheme 1), have been prepared photochemically by hydrophosphination of the corresponding 1-alkenes with H2P(CH2)3PH2. Water-soluble palladium complexes cis-[Pd(L)(OAc)2] (1–8) were obtained by the reaction of Pd(OAc)2 with the ligands a–h in a 1:1 mixture of dichloromethane:acetonitrile. The water-soluble phosphine ligands and their palladium complexes were characterized by IR, 1H and 31P NMR. A crystallographic study of complex 1 shows that the Pd(II) ion has a square planar coordination sphere in which the acetate ligands and the diphosphine ligand deviate by less than 0.12 Å from ideal planar. |
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| Keywords: | Palladium Complex X-ray structures Phosphine Water-soluble Hydrophosphination Phosphonate |
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