Racemic methyl 3,10-dioxa-2-aza-tri-cyclo-[6.2.1.0]undecane-4-carboxyl-ate.

The structure of the racemic title compound, C(10)H(15)NO(4), consists of a tricyclic skeleton comprising a six-membered piperidine ring and five-membered isoxazolidine and tetra-hydro-furan rings. The piperidine ring adopts a distorted chair conformation, while the isoxazolidine and tetra-hydro-furan rings have envelope conformations.

Dibromidobis(N,N,N',N'-tetra-methyl-thio-urea-κS)cadmium(II).

In the title compound, [CdBr(2)(C(5)H(12)N(2)S)(2)], the Cd(II) atom lies on a twofold rotation axis. It exhibits a distorted tetra-hedral coordination environment defined by two S atoms of two tetra-methyl-thio-urea (tmtu) ligands and two bromide ions. The crystal structure is consolidated by C-H⋯N and C-H⋯S hydrogen bonds.

Diiodidobis(N,N,N',N'-tetra-methyl-thio-urea-κS)cadmium(II).

In the title compound, [CdI(2)(C(5)H(12)N(2)S)(2)], the Cd(II) ion is located on a twofold rotation axis and is coordinated in a distorted tetra-hedral mode by two iodide ions and by two tetra-methyl-thio-urea (tmtu) ligands through their S atoms. The crystal structure is stabilized by C-H⋯N and C-H⋯S hydrogen bonds.

Dichloridobis(N,N,N',N'-tetra-methyl-thio-urea-κS)mercury(II).

In the title compound, [HgCl(2)(C(5)H(12)N(2)S)(2)], the Hg(II) atom is located on a twofold rotation axis and is bonded in a distorted tetra-hedral coordination mode to two chloride ions and to two tetra-methyl-thio-urea (tmtu) mol-ecules through their S atoms. The crystal structure is stabilized by C-H⋯N and C-H⋯S hydrogen bonds.

Synthesis, Characterization, and Photoelectrochemical Catalytic Studies of a Water-Stable Zinc-Based Metal-Organic Framework.

Metal-organic frameworks (MOFs) are class of porous materials that can be assembled in a modular manner by using different metal ions and organic linkers. Owing to their tunable structural properties, these materials are found to be useful for gas storage and separation technologies, as well as for catalytic applications. A cost-effective zinc-based MOF ([Zn(bpcda)(bdc)]n ) is prepared by using N,N'-bis(pyridin-4-ylmethylene)cyclohexane-1,4-diamine [N,N'-bis(pyridin-4-ylmethylene)cyclohexane-1,4-diamine] and benzenedicarboxylic acid (bdc) linkers. This new material exhibits remarkable photoelectrochemical (PEC) catalytic activity in water splitting for the evolution of oxygen. Notably, this non-noble metal-based MOF, without requiring immobilization on other supports or containing metal particles, produced a highest photocurrent density of 31 µA cm-2 at 0.9 V, with appreciable stability and negligible photocorrosion. Advantageously for the oxygen evolution process, no external reagents or sacrificial agents are required in the aqueous electrolyte solution.