1,3-Bis(2-ethoxy-phen-yl)triazene methanol 0.33-solvate.

There are three independent mol-ecules of 1,3-bis-(2-ethoxy-phen-yl)triazene and a mol-ecule of methanol in the asymmetric unit of the title compound, C(16)H(19)N(3)O(2)·0.33CH(3)OH. Two mol-ecules related by a non-crystallographic pseudo-twofold rotation axis are linked via distinct inter-molecular N-H⋯N hydrogen bonds, leading to the formation of a dimer with an R(2) (2)(8) graph set. The third mol-ecule is connected to the methanol mol-ecule by O-H⋯N and N-H⋯O hydrogen bonds. There are a number of weak C-H⋯π inter-actions, with H⋯π distances ranging from 2.74 to 2.89 Šbetween the C-H groups and the aromatic benzene rings.

[1,3-Bis(2-ethoxy-phen-yl)triazenido]chloridomercury(II).

In the title compound, [Hg(C(16)H(18)N(3)O(2))Cl], the Hg(II) atom is four-coordinated in a tetra-hedral geometry by two N atoms from the 1,3-chelating and one O atom of a 1,3-bis-(2-ethoxy-phen-yl)triazenido ligand and one terminal chloride ion. The dihedral angle between the aromatic rings is 1.72 (14)°. In the crystal C-H⋯π stacking inter-actions occur.

1,3-Bis(2-ethoxy-phen-yl)triazene.

The title compound, C(16)H(19)N(3)O(2), exhibits a trans geometry about the N=N double bond in the triazene unit in the solid state, and individual mol-ecules are close to planar with r.m.s. deviations from planarity of 0.065 Šand 0.242 Šfor the two independent molecules in the asymmetric unit. Distinct inter-molecular N-H⋯N hydrogen bonds lead to the formation of dimers with an R(2) (2)(8) graph-set motif. The steric demands of the eth-oxy groups in the ortho position prevent a coplanar arrangement of the two mol-ecules in the dimers and these instead consist of two inter-locked mol-ecules that are related by a non-crystallographic pseudo-twofold rotation axis. Weak C-H⋯π inter-actions between the CH groups and the aromatic phenyl rings also occur.