Journal of Chemical Sciences | |
Synthesis, characterization and crystal structure of four new asymmetric triazene ligands: An example of linear Hð‘”II complex with Hð‘”...𜋠secondary bonding interactions | |
Jafar Attar Gharamaleki2  Ayoob Babaii Sajirani1  Mohammad Kazem Rofouei22  Mohammad Reza Melardi1  Behrouz Notash3  Fatemeh Baber Shamsi Mogoii1  | |
[1] Department of Chemistry, Islamic Azad University, Karaj Branch, Karaj, Iran$$;Faculty of Chemistry, Kharazmi University, Tehran, Iran$$;Department of Chemistry, Shahid Beheshti University, G. C., Evin, Tehran 1983963113, Iran$$ | |
关键词: Mercury(II) complex; Hg· · · 𜋠interaction; asymmetric triazene; crystal structure.; | |
DOI : | |
来源: Indian Academy of Sciences | |
【 摘 要 】
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 ð¶2/ð‘ 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 $ar{1}$), 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-ðœ‚3-arene ðœ‹-interactions are present in this compound. Hydrogen bonds, 𜋠· · · 𜋠and C–H· · · 𜋠stacking interactions help in the stabilization of the resulted frameworks. These C–H· · · 𜋠edge-to-face interactions are present with H· · · 𜋠distance of 3.00 Ã….
【 授权许可】
Unknown
【 预 览 】
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