• Fatemeh Baber Shamsi Mogoii

Articles written in Journal of Chemical Sciences

• Synthesis, characterization and crystal structure of four new asymmetric triazene ligands: An example of linear H𝑔II complex with H𝑔...𝜋 secondary bonding interactions

In this work, the asymmetric ligands [1-(phenyl)-3-(2-nitro-4-methylphenyl)]triazene (1), [1-(4-methylphenyl)-3-(2-nitro-4-methylphenyl)]triazene (2), [1-(4-ethylphenyl)-3-(2-nitro-4-methylphenyl)]triazene (3) and [1-(4-ethoxyphenyl)-3-(2-nitro-4-methylphenyl)]triazene (4), were synthesized. The reaction of the ligand (3) with HgCl2 in methanol resulted in the formation of the [HgL2] complex, (5). All compounds were characterized by means of CHN analysis, FT-IR, 1H NMR, 13C NMR spectroscopy. In addition, the crystal structures of the ligands (2) to (4) were investigated by single crystal X-ray analysis. In the solid state, all ligands exhibited trans conformation about the –N=N– double bond. The HgII complex (5) crystallized in monoclinic system with 𝐶2/𝑐 space group. The triazene ligand was found to be deprotonated prior to coordination and acts as monodentate ligand. The HgII which lies on inversion center (site symmetry $\bar{1}$), is surrounded by two N atoms from L ligands forming a linear geometry. The other two Hg–N bonds are relatively longer and can only be regarded as weak secondary bonds. Also, Hg-𝜂3-arene 𝜋-interactions are present in this compound. Hydrogen bonds, 𝜋 · · · 𝜋 and C–H· · · 𝜋 stacking interactions help in the stabilization of the resulted frameworks. These C–H· · · 𝜋 edge-to-face interactions are present with H· · · 𝜋 distance of 3.00 Å.

• # Journal of Chemical Sciences

Volume 132, 2019
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Posted on July 25, 2019