Bis(μ-iminodiacetato)bis[(2,2′-diamino-4,4′-bi-1,3-thiazole)lead(II)] tetrahydrate

Mei Du,Jing-Jing Nie,Bing-Xin Liu,Duan-Jun Xu

doi:10.1107/s1600536810006926

Mei Du, Jing-Jing Nie + Show 2 more

Open Access

https://doi.org/10.1107/s1600536810006926

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Abstract

In the crystal structure of the title compound, [Pb2(C4H5NO4)2(C6H6N4S2)2]·4H2O, the dinuclear PbII complex molecule is centrosymmetric. The Pb atom is chelated by a tridentate iminodiacetate anion (IDA) and a diaminobithiazole (DABT) ligand, while a carboxylate O atom from an adjacent IDA anion further bridges the Pb atom with a longer Pb—O bond [2.892 (3) Å]. The lone-pair electrons of the Pb atom occupy an axial site in the Ψ-pentagonal-bipyramidal coordination polyhedron. The IDA anion displays a facial configuration: its chelating five-membered rings assume an envelope configuration. Within the DABT ligand, the two thiazole rings are twisted relative to each other, making a dihedral angle of 9.51 (17)°. Extensive N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonding helps to stabilize the crystal structure.

Highlights

In the crystal structure of the title compound, [Pb2(C4H5NO4)2(C6H6N4S2)2]Á4H2O, the dinuclear PbII complex molecule is centrosymmetric
The Pb atom is chelated by a tridentate iminodiacetate anion (IDA) and a diaminobithiazole (DABT) ligand, while a carboxylate O atom from an adjacent IDA anion further bridges the Pb atom with a longer Pb—O bond [2.892 (3) A ]
Symmetry codes: (ii) x, y, z+1; (iii) x, y+1, z−1; (iv) −x+1, −y+2, −z; (v) −x+2, −y+2, −z; (vi) −x+2, −y+1, −z; (vii) x, y+1, z

Summary

Structure Reports Online

Key indicators: single-crystal X-ray study; T = 295 K; mean (C–C) = 0.007 A; R factor = 0.020; wR factor = 0.048; data-to-parameter ratio = 11.8. In the crystal structure of the title compound, [Pb2(C4H5NO4)2(C6H6N4S2)2]Á4H2O, the dinuclear PbII complex molecule is centrosymmetric. The Pb atom is chelated by a tridentate iminodiacetate anion (IDA) and a diaminobithiazole (DABT) ligand, while a carboxylate O atom from an adjacent IDA anion further bridges the Pb atom with a longer Pb—O bond [2.892 (3) A ]. The IDA anion displays a facial configuration: its chelating fivemembered rings assume an envelope configuration. Within the DABT ligand, the two thiazole rings are twisted relative to each other, making a dihedral angle of 9.51 (17). Extensive N—HÁ Á ÁO, O—HÁ Á ÁO and weak C—HÁ Á ÁO hydrogen bonding helps to stabilize the crystal structure

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