Crystal structure of (N^C) cyclo-metalated AuIII diazide at 100 K

Volodymyr Levchenko; Sigurd Øien-Ødegaard; David Wragg; Mats Tilset

doi:10.1107/S2056989020012955

Crystal structure of (N^C) cyclo-metalated Au^III diazide at 100 K

Acta Crystallogr E Crystallogr Commun. 2020 Oct 9;76(Pt 11):1725-1727. doi: 10.1107/S2056989020012955. eCollection 2020 Nov 1.

Authors

Volodymyr Levchenko¹, Sigurd Øien-Ødegaard¹, David Wragg¹, Mats Tilset¹

Affiliation

¹ Department of Chemistry and Center for Materials Science and Nanotechnology (SMN), University of Oslo, PO Box 1126 Blindern, N-0318 Oslo, Norway.

Abstract

The title compound, an (N^C)-cyclo-metalated gold(III) diazide, namely, di-azido-[5-eth-oxy-carbonyl-2-(5-eth-oxy-carbonyl-pyridin-2-yl)phenyl-κ² C ¹,N]gold(III), [Au(C₁₇H₁₆NO₄)(N₃)₂] or Au(ppy^Et)(N₃)₂, was synthesized by reacting Au(ppy^Et)Cl₂ with NaN₃ in water for 24 h. The complex has been structurally characterized and features a gold center with a square-planar environment. The Au-N(azide) bond lengths are significantly different depending on the influence of the atom trans to the azide group [Au-N(trans to C) of 2.067 (2) Å versus Au-N(trans to N) of 2.042 (2) Å]. The azide groups are twisted in-and-out of plane by 56.2 (2)°.

Keywords: azide; crystal structure; cyclometallated; gold(III); trans influence.

Grants and funding

This work was funded by Norges Forskningsråd grant 250795.