• Mohammad Kazem Rofouei

      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

      Mohammad Reza Melardi Fatemeh Baber Shamsi Mogoii Ayoob Babaii Sajirani Jafar Attar Gharamaleki Behrouz Notash Mohammad Kazem Rofouei

      More Details Abstract Fulltext PDF

      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.

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