The role of a redox-active non-innocent ligand in additive-free C-C Glaser-Hay and Suzuki coupling reactions by an -aminophenol palladium(ii) complex.

A novel mononuclear palladium complex with 2-(3,5-di--butyl-2-hydroxyphenyl amino) benzonitrile as a non-innocent ligand (abbreviated as PdL ) was synthesized, and characterized by IR, UV-Vis, H and C NMR spectroscopies and elemental analysis. The crystal structure clearly showed that the metal center was in a square planar environment. The bond lengths obtained from X-ray structure analysis revealed that both ligands are in the -iminobenzosemiquinone radical form.

Luminescence and Dielectric Switchable Properties of a 1D (1,1,1-Trimethylhydrazinium)PbI Hybrid Perovskitoid.

The synthesis and investigation of the physicochemical properties of a novel one-dimensional (1D) hybrid organic-inorganic perovskitoid templated by the 1,1,1-trimethylhydrazinium (MeHy) cation are reported. (MeHy)[PbI] crystallizes in the hexagonal 6/ symmetry and undergoes two phase transitions (PTs) during heating (cooling) at 322 (320) and 207 (202) K. X-ray diffraction data and temperature-dependent vibrational studies show that the second-order PT to the high-temperature hexagonal 6/ phase is associated with a weak change in entropy and is related to weak structural changes and different confinement of cations in the available space.

Biological Inspirations: Iron Complexes Mimicking the Catechol Dioxygenases.

Within the broad group of Fe non-heme oxidases, our attention was focused on the catechol 1,2- and 2,3-dioxygenases, which catalyze the oxidative cleavage of aromatic rings. A large group of Fe complexes with N/O ligands, ranging from N to NOS, was developed to mimic the activity of these enzymes. The Fe complexes discussed in this work can mimic the intradiol/extradiol catechol dioxygenase reaction mechanism.