Di-μ-bromido-bis[bromido(4,4′-dimethyl-2,2′-bipyridine-κ2N,N′)mercury(II)

Khadijeh Kalateh,Vahid Amani,Roya Ahmadi,Hamid Reza Khavasi,Amin Ebadi

doi:10.1107/s1600536808032510

Abstract

The asymmetric unit of the title compound, [Hg2Br4(C12H12N2)2], contains one half-molecule. The HgII atom is five-coordinated in a trigonal–bipyramidal configuration by two N atoms from the chelating 4,4′-dimethyl-2,2′-bipyridine ligand, two bridging Br and one terminal Br atom, leading to a centrosymmetric dimeric molecule. There is a π–π contact between the pyridine rings [centroid-to-centroid distance = 3.756 (5) Å].

Highlights

The asymmetric unit of the title compound, [Hg2Br4(C12H12N2)2], contains one half-molecule
The HgII atom is five-coordinated in a trigonal–bipyramidal configuration by two N atoms from the chelating 4,40-dimethyl-2,20bipyridine ligand, two bridging Br and one terminal Br atom, leading to a centrosymmetric dimeric molecule
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HK2544)

Summary

Structure Reports Online

Key indicators: single-crystal X-ray study; T = 120 K; mean (C–C) = 0.011 A; R factor = 0.043; wR factor = 0.165; data-to-parameter ratio = 23.4. The asymmetric unit of the title compound, [Hg2Br4(C12H12N2)2], contains one half-molecule. The HgII atom is five-coordinated in a trigonal–bipyramidal configuration by two N atoms from the chelating 4,40-dimethyl-2,20bipyridine ligand, two bridging Br and one terminal Br atom, leading to a centrosymmetric dimeric molecule. There is a – contact between the pyridine rings [centroid-to-centroid distance = 3.756 (5) A ]. Crystal data [Hg2Br4(C12H12N2)2] Mr = 1089.25 Triclinic, P1 a = 7.3187 (15) Ab = 9.2647 (19) Ac = 11.345 (2) A = 103.50 (3) = 102.02 (3)

Data collection

Special details