Three manganese(II) N-oxide complexes have been synthesized from the reaction of manganese(II) chloride with either pyridine N-oxide (PNO), 2-methyl-pyridine N-oxide (2MePNO) or 3-methyl-pyridine N-oxide (3MePNO). The compounds were synthesized from methano-lic solutions of MnCl2·4H2O and the respective N-oxide, and subsequently characterized structurally by single-crystal X-ray diffraction. Th...

Molecular cages with arylboronate ester caps at the vertices are described. The were obtained by metal-templated polycondensation reactions of a tris(2-formylpyridine oxime) ligand arylboronic acids. Suited templates triflate or triflimide salts ZnII, FeII, CoII, MnII. In products, metal ions coordinated internally to pyridyl and oximato N atoms adjacent boronate ester, resulting in an improved...

Coordination chemistry allows the synthesis of new molecules which show cooperative magnetic phenomena, behaving like magnets. Two main ways of synthesizing these systems have been developed: a) low-dimensional complexes (1-D or 2-D) which are linked in the crystal net and so give ferromagnetic long-range order and b) isolated molecules with high-spin ground state and strong anisotropy, which h...

Ribonucleotide reductases (RNRs) convert nucleotides to deoxynucleotides in all organisms. Activity of the class Ia and Ib RNRs requires a stable tyrosyl radical (Yⁱ), which can be generated by the reaction of O2 with a diferrous cluster on the β subunit to form active diferric-Yⁱ cofactor. Recent experiments have demonstrated, however, that in vivo the class Ib RNR contains an active dimangane...

Defects are emerging as a key tool for fine-tuning the stimuli-responsive behavior of coordination polymers and metal–organic frameworks. Here, we study ramifications defects on mechanical properties molecular perovskite [C(NH2)3]MnII(HCOO)3 its defective analogue [C(NH2)3]Fe2/3III□1/3(HCOO)3, where □ = vacancy. reduce bulk modulus by 30% give rise to temperature-driven phase transition not obs...