Polymeric bidimensional self-assembling of [HgII(RC6H4NNNC6H4R)2Py] (R = m-acetyl) through metal-η2,η2-arene π-interactions and non classical C–H⋯O bonding: Synthesis and X-ray characterization of a bis diaryl symmetric-substituted triazenide complex of H

Deprotonated 1,3-bis(3-acetylphenyl)triazene reacts with Hg(CH3COO)2 and pyridine to give light-yellow crystals of {[HgII(RC6H4NNNC6H4R)2Py]}n (R = acetyl). The tectons [HgII(RC6H4NNNC6H4R)2Py] [R = CH3C(O)] are linked to pairs as centrosymmetric dimers through reciprocal metal-η2-arene π-interactions. The dimeric units are operated by a screw axis 21 parallel to the crystallographic direction [0 1 0], also through a reflection–translation plane parallel to the c-axis, resulting a supramolecular bidimensional (2D) assembling of the dimeric tectons through non classical C–H⋯(O)CCH3 bonding.