Crystal structure of aqua(2-{[2-({2-[bis(carboxylato-κO-methyl)amino-κN]ethyl}(carboxylato-κO-methyl)amino-κN)ethyl](carboxymethyl)azaniumyl}acetato)gallium(III) trihydrate

Abstract

In the title GaIII complex compound with pentetic acid, [Ga(C14H20N3O10)(H2O)]·3H2O, the GaIII centre is bound in a slightly distorted octahedral coordination sphere by two amine N atoms, three carboxylate O atoms and one water O atom. The complex molecule exists as a zwitterion. In the crystal, the complexes are linked to each other via O—H...O and C—H...O hydrogen bonds, forming layers parallel to (001). Three uncoordinating water molecules link the complex layers via O—H...O, N—H...O and C—H...O hydrogen bonds, forming a three-dimensional network.

Keywords

• crystal structure
• gallium radioisotopes
• chelating agents
• pentetic acid
• DTPA