N′-(2,3-Dihy­droxy­benzyl­idene)isonicotinohydrazide

The title compound, C13H11N3O3, crystallized with two independent mol­ecules in the asymmetric unit. One of the mol­ecules is twisted while the other is almost planar, with dihedral angles of 28.02 (6) and 2.42 (9)°, respectively, between the benzene and pyridine rings. Intra­molecular O—H⋯O and O—H⋯N hydrogen bonds are present in both mol­ecules. The two independent mol­ecules are linked by pairs of O—H⋯O hydrogen bonds. The crystal structure is further stabilized by inter­molecular N—H⋯N hydrogen bonds and C—H⋯N and C—H⋯O inter­actions

Supramolecular Self-Organization in Mercury(Ii) Dicyclopentyldithiophosphate Polynuclear Complex

TAS, MURAT/0000-0002-2879-6501WOS: 000277651900029In the monomeric unit [Hg(mu-S(2)P(OCp)(2)) (S(2)P(OCp)(2))] (Cp = cyclopentyl) moiety, the one dithiophosphate ligand acts as a chelating ligand and the other one acts as a bridging ligand by their sulfur atoms. The monomeric units arrange in order to give rise to an infinite polymeric structure along the direction of the b axis by the two-fold screw axis. The compound displays a supramolecular self-organization in the solid state through the additional Hg center dot center dot center dot center dot S (3.516 angstrom) secondary interactions with formation of chain-like polymeric arrays. Also, there are some weak intra-and intermolecular hydrogen bonds between some of the hydrogen atoms of Cp and S atoms. The intermolecular hydrogen bonds form infinite polymeric chains that lie along the b axis, to each other, and along the c axis to contribute to the supramolecular association. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file