The Stability of Mercaptobenzothiazole Based Soft Scorpionate Complexes

Abstract

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A computational UV–Vis spectroscopic study of the chemical speciation of 2-mercaptobenzothiazole corrosion inhibitor in aqueous solution

“…Besides being used as a corrosion inhibitor and a rubber vulcanization accelerator, MBT continues to find new applications due to its chelating ability [17][18][19]. For this reason, its structural properties are a matter of wide interest [1,20].…”

Dihalo bismuth cations: unusual coordination properties and inverse solvent effects in Lewis acidity

“…Bismuth( iii ) compounds appear to be ideal candidates to study the influence of lone pairs at the central atom on the coordination chemistry of high-coordinate molecular species, because bismuth atoms can readily adopt high coordination numbers due to their large atomic radius and sufficient Lewis acidity. 2,14 With compounds such as [Bi(H 2 O) 9 ][OTf] 3 , 10,11 [Bi(dmso) 8 ][ClO 4 ] 3 , 10 [Bi(SePMe 3 ) 6 ][OTf] 3 , 8 and [Bi(dmf) 8 ] [Bi 3 I 12 ], 15 coordination numbers of up to nine have been realized. A number of intriguing examples with seven-coordinate bismuth compounds such as [BiCl 3 (py) 4 ], 9,16 [BiI 2 (15-crown-5)][Bi 2 I 7 ], 17 and related species 18–21 have been reported.…”

Photoinduced Reactivity of the Soft Hydrotris(6-tert-butyl-3-thiopyridazinyl)borate Scorpionate Ligand in Sodium, Potassium, and Thallium Salts

“…25−27 However, the solvolytic cleavage of scorpionate ligands, especially when attached to a Lewis acidic transition metal, has been a recurrent issue. 6,22,28 It is assumed that the B−N bond weakens with decreasing electron density of the heterocycle.We have recently developed hydrotris(3-thiopyridazinyl)-borate scorpionate ligands featuring electron-deficient pyridazine heterocycles. The derived higher electrophilic complexes are prone to diverse reactivity in comparison to other scorpionate ligands, allowing isolation of the first copper boratrane complex bearing a sulfur rich environment.…”

“…25−27 However, the solvolytic cleavage of scorpionate ligands, especially when attached to a Lewis acidic transition metal, has been a recurrent issue. 6,22,28 It is assumed that the B−N bond weakens with decreasing electron density of the heterocycle.…”

“…They all show significantly different chemical behavior compared to the nitrogen-based Tp ligands and are widely applied in coordination and bioinorganic chemistry. − The larger sulfur atom, as well as the larger chelate ring (8- vs 6-membered), leads to a larger coordination pocket for the metal center, allowing more flexibility of the ligand binding. This is illustrated by the occurrence of complexes with inverted boron centers, where the hydride ion points toward the coordinated metal, or the formation of direct metal (M)–B bonds. − However, the solvolytic cleavage of scorpionate ligands, especially when attached to a Lewis acidic transition metal, has been a recurrent issue. ,, It is assumed that the B–N bond weakens with decreasing electron density of the heterocycle.…”