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Crystal structure and spectroscopic study of di-μ(1,1)-azido-di-μ(0,0-nitrato)tetrakis(3,5-lutidine)dicopper(II), [Cu(N3) (NO3) (3,5-lutidine)2]2

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Abstract

A mixed ligand 1∶2 complex of copper(II) azide with 3,5-lutidine, namely di-μ(1,1)-azido-diμ(0,0)-nitrato)tetrakis(3,5-lutidine)dicopper(II) has been prepared and characterized by X-ray crystallographic and spectroscopic methods. The dimeric molecule, which possesses a crystallographic inversion center, contains twoμ(1,1) bridging azido ligands. Each copper(II) atom in the cyclic Cu2N2 unit is further coordinated by two oxygen atoms from twoμ(0,0-nitrato) bridges at Cu-O distances of 2.465(3) and 2.568(3) Å and two nitrogen atoms from the lutidine molecules [Cu-N=2.003(3) and 2.012(3) Å] to give a distorted tetragonal bipyramid. Both azido ligands are linear [N-N-N angle=179.0(4) and asymmetric Nα-Nβ=1.207(4) and Nβ-Nτ=1.135(5) Å]. The azido bridges produce a rather short Cu ⋯ Cu distance of 3.013(2) Å. Infrared and electronic data are presented and discussed.

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Correspondence to Franz A. Mautner.

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Mautner, F.A., Goher, M.A.S. Crystal structure and spectroscopic study of di-μ(1,1)-azido-di-μ(0,0-nitrato)tetrakis(3,5-lutidine)dicopper(II), [Cu(N3) (NO3) (3,5-lutidine)2]2 . Struct Chem 5, 171–175 (1994). https://doi.org/10.1007/BF02262838

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Key words

  • Azido complex
  • copper(II) complex
  • 3,5-lutidine, nitrato complex
  • crystal structure of
  • spectroscopic study of