Crystal structure of the salt bis(triethanolamine-κ3N,O,O′)cobalt(II) bis[2-(2-oxo-2,3-dihydro-1,3-benzothiazol-3-yl)acetate]

Abstract

The reaction of 2-(2-oxo-2,3-dihydro-1,3-benzothiazol-3-yl)acetic acid (NBTA) and triethanolamine (TEA) with Co(NO3)2 results in the formation of the title complex, [Co(C6H15NO3)2](C9H6NO3S)2, which is formed as a result of the association of bis(triethanolamine)cobalt(II) and 2-(2-oxo-2,3-dihydro-1,3-benzothiazol-3-yl)acetate units. It crystallizes in the monoclinic centrosymmetric space group P21/c, with the CoII ion situated on an inversion centre. In the complex cation, the CoII ion is octahedrally coordinated by two N,O,O′-tridentate TEA molecules with a facial distribution and the N atoms in a trans arrangement. Two ethanol groups of each TEA molecule form two five-membered chelate rings around the CoII ion, while the third ethanol group does not coordinate to the metal. The free and coordinating hydroxy groups of the TEA molecules are involved in hydrogen bonding with the O atoms of NBTA anions, forming an infinite two-dimensional network extending parallel to the bc plane.

Keywords

• crystal structure
• triethanolamine
• α-(N-benzothiazolin-2-one) acetic acid
• hydrogen bonding