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Synthesis, structures, and spectroscopic properties of copper(I) complexes bearing 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine and 1,2-bis(diphenylphosphino)ethane ligands

  • Research Article
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Central European Journal of Chemistry

Abstract

A new ligand napaa (napaa = 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine) and its two dinuclear copper(I) complexes, Cu2(napaa)(dppe)2(ClO4)2 (1) and Cu2(napaa)(PPh3)4(BF4)2 (2) (dppe = 1,2-bis(diphenylphosphino)ethane) and PPh3 = triphenylphosphine) were synthesized and characterized, and the structure of 1 was determined by X-ray crystal analysis. Each copper atom in 1 has a distorted tetrahedral geometry in which the metal center is associated to napaa and dppe ligands displaying chelating coordination modes and the naphthyridine rings of napaa are almost coplanar. The two complexes exhibit similar electronic absorption spectra with λmax at about 366 nm, which can be tentatively assigned to metal-to-ligand charge-transfer (MLCT) transition. The assignment was further supported by density functional theory (DFT) calculations.

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Authors and Affiliations

  1. Technical Institute of Physics and Chemistry, Graduate University of Chinese Academy of Sciences, Beijing, 100190, P.R China

    Shao-Ming Chi & Wen-Fu Fu

  2. College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650092, P.R China

    Yu-Fei Wang, Xin Gan, De-Hui Wang & Wen-Fu Fu

Authors
  1. Shao-Ming Chi
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  2. Yu-Fei Wang
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  3. Xin Gan
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  4. De-Hui Wang
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  5. Wen-Fu Fu
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Correspondence to Wen-Fu Fu.

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Chi, SM., Wang, YF., Gan, X. et al. Synthesis, structures, and spectroscopic properties of copper(I) complexes bearing 7-acetamido-4-methyl-1,8-naphthyridin-2-carbaldehyde azine and 1,2-bis(diphenylphosphino)ethane ligands. cent.eur.j.chem. 7, 923–928 (2009). https://doi.org/10.2478/s11532-009-0087-y

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