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Synthesis and characterization of [Cu(Phca2en)(PPh3)X] (X=Cl, Br, I, NCS, N3) complexes: crystal structures of [Cu(Phca2en)(PPh3)Br] and [Cu(Phca2en)(PPh3)I]

Abstract

New mixed-ligand copper(I) complexes, [Cu(Phca2en)(PPh3)X], [Phca2en = N,N′-bis(β-phenylci-nnamaldehyde)-1,2-diiminoethane and X=Cl (1), Br (2), I (3), NCS (4), N3 (5)] have been synthesized and characterized by various techniques. 1H and 13C-NMR and IR spectral data of these copper(I) complexes are compared with the free ligand to elucidate some structural features. The structures of [Cu(Phca2en)(PPh3)Br] (2) and [Cu(Phca2en)(PPh3)I] (3) have been determined from single-crystal data showing that the coordination geometry around copper atom is a distorted tetrahedron. Furthermore, these Cu(I) complexes exhibit supramolecular motifs of the type multiple phenyl embraces resulting from attractive interactions between phenyl rings of PPh3 moieties. The presence of the C–H…Cu weak intramolecular hydrogen bonds, due to the trapping of C–H bonds in the vicinity of the metal atoms, is also reported.

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Acknowledgements

The authors wish to thank the Division of Inorganic Chemistry, Department of Chemistry, Göteborg University for providing X-ray structure determination facilities. M.A. and S. D. would like to acknowledge the Isfahan University of Technology and Alzahra University Research Council for partial support of this work through Grant 1CHH 811.

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Correspondence to Mehdi Amirnasr.

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Dehghanpour, S., Mahmoudkhani, A.H. & Amirnasr, M. Synthesis and characterization of [Cu(Phca2en)(PPh3)X] (X=Cl, Br, I, NCS, N3) complexes: crystal structures of [Cu(Phca2en)(PPh3)Br] and [Cu(Phca2en)(PPh3)I]. Struct Chem 17, 255–262 (2006). https://doi.org/10.1007/s11224-006-9016-2

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Keywords

  • Copper(I) complexes
  • β-phenylcinnamaldehyde Schiff base
  • Crystal structure
  • Multiple phenyl embraces