Crystal structure of di-aqua-bis-(7-di-ethyl-amino-3-formyl-2-oxo-2H-chromen-4-olato-κ(2) O (3),O (4))zinc(II) dimethyl sulfoxide disolvate

Aaron B Davis; Frank R Fronczek; Karl J Wallace

doi:10.1107/S2056989016009853

Crystal structure of di-aqua-bis-(7-di-ethyl-amino-3-formyl-2-oxo-2H-chromen-4-olato-κ(2) O (3),O (4))zinc(II) dimethyl sulfoxide disolvate

Acta Crystallogr E Crystallogr Commun. 2016 Jun 24;72(Pt 7):1032-6. doi: 10.1107/S2056989016009853. eCollection 2016 Jul 1.

Authors

Aaron B Davis¹, Frank R Fronczek², Karl J Wallace¹

Affiliations

¹ Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi 39406, USA.
² Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.

Abstract

The structure of the title coordination complex, [Zn(C14H14NO4)2(H2O)2]·2C2H6OS, shows that the Zn(II) cation adopts an octa-hedral geometry and lies on an inversion center. Two organic ligands occupy the equatorial positions of the coordination sphere, forming a chelate ring motif via the O atom on the formyl group and another O atom of the carbonyl group (a pseudo-β-diketone motif). Two water mol-ecules occupy the remaining coordination sites of the Zn(II) cation in the axial positions. The water mol-ecules are each hydrogen bonded to a single dimethyl sulfoxide mol-ecule that has been entrapped in the crystal lattice.

Keywords: DMSO solvate; coumarin ligands; crystal structure; hydrogen bonding; zinc complex.