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

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-κ(2) C (1),N]gold(III), [Au(C(17)H(16)NO(4))(N(3))(2)] or Au(ppy(Et))(N(3))(2), was synthesized by reacting Au(ppy(Et))Cl(2) with NaN(3) 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)†à versus Au-N(trans to N) of 2.042†(2)†à ]. The azide groups are twisted in-and-out of plane by 56.2†(2)°.