Influence of Cu2O Precursor Surface Orientation on Catalytic Performance and Product Selectivity in Nitrate Reduction Reactions.

Oxide-derived copper (OD-Cu) has attracted considerable attention due to its exceptional electrocatalytic performance toward various reactions, including the reduction of nitrate (NO3-) to ammonia (NH3). Furthermore, numerous techniques have been developed to synthesize copper oxides with well-defined surface orientations. However, the relationship between the surface orientation of the precursor and the NO3- reduction performance of the resulting OD-Cu catalyst remains unclear.

Monomeric tri-coordinated bis(ferrocenyl)haloalumanes.

The reactions of the sterically demanding ferrocenyl lithium dimer (Fc*Li) (Fc* = 2,5-bis(3,5-di--butyl-phenyl)-1-ferrocenyl) with aluminum trihalides (AlCl, AlBr, and AlI) to furnish the corresponding monomeric bis(ferrocenyl)haloalumanes are reported. In the case of the reaction with AlI, an unexpected intramolecular 1,1'-aluminum migration in the ferrocenyl moiety was found to occur. Their monomeric structures with a tri-coordinated aluminum atom show affinitive Al⋯Fe interactions.

Hydroxamate-Based Metal-Organic Frameworks.

This mini-review focuses on recent developments in hydroxamate-based metal-organic frameworks (MOFs), which exhibit unique structures and properties distinct from those of carboxylate-based MOFs. Hydroxamates (RCONHO) form MOFs with novel structural motifs and functionalities. In this review, synthetic strategies, structural characteristics, and functional applications of key examples of hydroxamate-based MOFs are described, providing insights into the influence of the hydroxamate ligand on the MOF properties compared to that of the carboxylate-based analogues.

Bis(methylene)-λ-phosphane anions.

Bis(methylene)-λ-phosphane anions, , anionic phosphorus-centered heteroallene-type molecules, were obtained from the desilylation of a bis(silyl)methyl-substituted phosphaalkene. Their molecular structures, which were determined using spectroscopic techniques and single-crystal X-ray diffraction analysis, suggest that the central di-coordinated P atom is engaged in cumulative C[double bond, length as m-dash]P[double bond, length as m-dash]C π-bonds with the neighboring C atoms. The π-bond character of the C[double bond, length as m-dash]P[double bond, length as m-dash]C moieties was examined on the basis of the experimental results in combination with theoretical calculations; the results obtained suggest that multiple silyl substitutions at the C atom weaken the C[double bond, length as m-dash]P π-bonding character.

A tin analogue of propadiene with cumulated C[double bond, length as m-dash]Sn double bonds.

The synthesis, structure, and properties of a stable, linear 2-stannapropadiene are reported. The identical C[double bond, length as m-dash]Sn bonds in this 2-stannapropadiene are the shortest hitherto reported C-Sn bonds. This 2-stannapropadiene features a Sn NMR signal at 507 ppm for the central tin atom, indicative of an unsaturated Sn oxidation state.