Bis(pyridine-2,6 O, O ′)cobalt(II) and -Copper(II) Disaccharinate Dihydrate: Three-Dimensional Structures With Extensive Hydrogen Bonds and Aromatic Π-Π Interactions

Abstract

Bis(pyridine-2,6-dimethanol-N, O, O ′)cobalt(II) disaccharinate dihydrate, [Co(C<inf>7</inf>H<inf>9</inf>NO<inf>2</inf>)<inf>2</inf>](C<inf>7</inf>H<inf>4</inf>NO<inf>3</inf>S)<inf>2</inf>·2H<inf>2</inf>O, (I), and bis(pyridine-2,6-dimethanol-N, O, O ′)copper(II) disaccharinate dihydrate, [Cu(C<inf>7</inf>H<inf>9</inf>NO<inf>2</inf>)<inf>2</inf>](C<inf>7</inf>H<inf>4</inf>NO<inf>3</inf>S)<inf>2</inf>·2H<inf>2</inf>O, (II), collectively [M(dmpy)<inf>2</inf>](sac)<inf>2</inf>·2H<inf>2</inf>O (where M is CoII or CuII, sac is the saccharinate anion and dmpy is pyridine-2,6-dimethanol), are isostructural. The [M(dmpy)<inf>2</inf>]2+ cations exhibit distorted octahedral geometry in which the two neutral dmpy species act as tripodal N, O, O ′-tridentate ligands. The crystal packing is determined by hydrogen bonding, as well as by weak pyridine-saccharinate π-π-stacking interactions.