Raikko Kivekäs

TL;DR: In this paper, the tridentate Schiff-base carboxylate-containing ligands, derived from the condensation of 2-imidazolecarboxaldehyde with the amino acids β-alanine (H2L1) and 2-aminobenzoic acid (H 2L5), react with copper(II) perchlorate to give rise to the helical-chain complexes.

TL;DR: At the B3LYP/6-31G* level of theory, it has been proven that the Mulliken charge on each boron after substitution of -H by -Me increases by +0.18 unit, which leads to a high build-up of positive charge upon permethylation, then hampering it.

TL;DR: In this article, the structure of the tridentate Schiff base H2L was solved by X-ray crystallographic methods and the magnetic properties of the three complexes were studied by susceptibility measurements as a function of the temperature and successfully analyzed in terms of the isotropic spin Hamiltonian.

Abstract: The preparation, magnetic properties, and crystal and molecular structure of [CuL(H 2 O)] n are described (L stands for the doubly deprotonated form of 1,3-dimethyl-5-((2-carboxyphenyl)azo)barbituric acid). The crystals are orthorhombic, of space group P2 1 2 121 , with cell constants a=8.171 (1) A, b=10.302 (3) A, c=17.006 (5) A, and Z=4. The structure was solved and refined to R=0.052. The copper(II) ions are in a distorted square-pyramidal environment

TL;DR: In this article, the synthesis, crystal structure and magnetic properties for the trinuclear compound [Cu(H2O)4{Cu(HL)(H 2O)(ClO4)]2]2·2H 2 O, where HL is the monodeprotonated form of 6-methylamino-1,3-dimethyl-5-[(2′-carboxyphenyl)azo]uracil, were reported.