Heavier group 2 metal complexes with a flexible scorpionate ligand based on 2-mercaptopyridine. Naktode, K., Reddy, T., Nayek, H., Mallik, B., & Panda, T. RSC Advances, 2015. abstract bibtex We report the synthesis of novel alkaline earth metal complexes [κ2-SS-(Bmp)2M(THF)n] [M = Ca (2), Sr (3) n = 2; M = Ba (4), n = 3] of a flexible dihydrobis(2-thiopyridone)borate (Bmp) ligand based on 2-mercaptopyridine. Complexes 2-4 were isolated in good yield by the reaction between sodium dihydrobis(2-thiopyridone)borate, [(Bmp)Na(THF)2]n (1) and the corresponding alkaline earth metal diiodides in toluene at ambient temperature. The solid-state structures of the strontium and barium complexes, complexes 3 and 4 respectively, were established using single-crystal X-ray diffraction analysis. The solid-state structure of sodium complex 1 was also confirmed using X-ray techniques. The solid-state structures of complexes 3 and 4 revealed that the Bmp ligand coordinates through sulphur atoms to the metal ions in κ2 fashion. The strontium ion is attached symmetrically and the barium ion is asymmetrically linked with the Bmp ligand, manifesting the 2-thiopyridone and pyridine-2-thiolate tautomeric form of the Bmp ligand. The strontium ion in complex 3 adopts a distorted octahedral geometry whereas the geometry around the barium ion can best be described as a distorted pentagonal bipyramidal. Both complexes 3 and 4 also have a short B⋯H⋯M interaction due to the presence of the BH2 group in the ligand. In the solid state, sodium complex 1 is polymeric in nature and in the asymmetric unit each sodium ion is bonded to two sulphur atoms through η1 and μ2 modes. The adjacent BH2 group is also linked with each sodium ion through hydrogen atoms via μ2 and η1.
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title = {Heavier group 2 metal complexes with a flexible scorpionate ligand based on 2-mercaptopyridine},
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year = {2015},
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abstract = {We report the synthesis of novel alkaline earth metal complexes [κ<sup>2</sup>-SS-(Bmp)<inf>2</inf>M(THF)<inf>n</inf>] [M = Ca (2), Sr (3) n = 2; M = Ba (4), n = 3] of a flexible dihydrobis(2-thiopyridone)borate (Bmp) ligand based on 2-mercaptopyridine. Complexes 2-4 were isolated in good yield by the reaction between sodium dihydrobis(2-thiopyridone)borate, [(Bmp)Na(THF)<inf>2</inf>]<inf>n</inf> (1) and the corresponding alkaline earth metal diiodides in toluene at ambient temperature. The solid-state structures of the strontium and barium complexes, complexes 3 and 4 respectively, were established using single-crystal X-ray diffraction analysis. The solid-state structure of sodium complex 1 was also confirmed using X-ray techniques. The solid-state structures of complexes 3 and 4 revealed that the Bmp ligand coordinates through sulphur atoms to the metal ions in κ<sup>2</sup> fashion. The strontium ion is attached symmetrically and the barium ion is asymmetrically linked with the Bmp ligand, manifesting the 2-thiopyridone and pyridine-2-thiolate tautomeric form of the Bmp ligand. The strontium ion in complex 3 adopts a distorted octahedral geometry whereas the geometry around the barium ion can best be described as a distorted pentagonal bipyramidal. Both complexes 3 and 4 also have a short B⋯H⋯M interaction due to the presence of the BH<inf>2</inf> group in the ligand. In the solid state, sodium complex 1 is polymeric in nature and in the asymmetric unit each sodium ion is bonded to two sulphur atoms through η<sup>1</sup> and μ<sup>2</sup> modes. The adjacent BH<inf>2</inf> group is also linked with each sodium ion through hydrogen atoms via μ<sup>2</sup> and η<sup>1</sup>.},
bibtype = {article},
author = {Naktode, K. and Reddy, T.D.N. and Nayek, H.P. and Mallik, B.S. and Panda, T.K.},
journal = {RSC Advances},
number = {63}
}
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Complexes 2-4 were isolated in good yield by the reaction between sodium dihydrobis(2-thiopyridone)borate, [(Bmp)Na(THF)<inf>2</inf>]<inf>n</inf> (1) and the corresponding alkaline earth metal diiodides in toluene at ambient temperature. The solid-state structures of the strontium and barium complexes, complexes 3 and 4 respectively, were established using single-crystal X-ray diffraction analysis. The solid-state structure of sodium complex 1 was also confirmed using X-ray techniques. The solid-state structures of complexes 3 and 4 revealed that the Bmp ligand coordinates through sulphur atoms to the metal ions in κ<sup>2</sup> fashion. The strontium ion is attached symmetrically and the barium ion is asymmetrically linked with the Bmp ligand, manifesting the 2-thiopyridone and pyridine-2-thiolate tautomeric form of the Bmp ligand. The strontium ion in complex 3 adopts a distorted octahedral geometry whereas the geometry around the barium ion can best be described as a distorted pentagonal bipyramidal. Both complexes 3 and 4 also have a short B⋯H⋯M interaction due to the presence of the BH<inf>2</inf> group in the ligand. In the solid state, sodium complex 1 is polymeric in nature and in the asymmetric unit each sodium ion is bonded to two sulphur atoms through η<sup>1</sup> and μ<sup>2</sup> modes. 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Complexes 2-4 were isolated in good yield by the reaction between sodium dihydrobis(2-thiopyridone)borate, [(Bmp)Na(THF)<inf>2</inf>]<inf>n</inf> (1) and the corresponding alkaline earth metal diiodides in toluene at ambient temperature. The solid-state structures of the strontium and barium complexes, complexes 3 and 4 respectively, were established using single-crystal X-ray diffraction analysis. The solid-state structure of sodium complex 1 was also confirmed using X-ray techniques. The solid-state structures of complexes 3 and 4 revealed that the Bmp ligand coordinates through sulphur atoms to the metal ions in κ<sup>2</sup> fashion. The strontium ion is attached symmetrically and the barium ion is asymmetrically linked with the Bmp ligand, manifesting the 2-thiopyridone and pyridine-2-thiolate tautomeric form of the Bmp ligand. 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