La Competència social i la conducta prosocial, en estudiants de secundària

At this work two fundamental elements in relationships with peers, social competence and prosocial behavior, are analyzed in 193 teenagers from secondary studies.. Results shows how scales of Prosocial Behaviour influences in a significative way on Social Competence sub-scales. High levels of Prosocial Behavior are significantly related in a positive way with Appropriate Social Skills dimension of social competence, while high levels of Antisocial Behavior are positively related to Inappropriate Assertiveness, Pride and Solitude scales. There is also a positive significance between Antisocial Behavior subscale and Inappropriate Assertiveness scale of Social Competence

New insights into the comprehension of the magnetic properties of dinuclear Mn(III) compounds with general formula [{MnL(NN)}2(μ-O)(μ-n-RC6H4COO)2]X2

Five new dinuclear Mn(III) compounds with benzoato derivative bridges [{Mn(bpy)L}2(μ-O)(μ-n-RC6H4COO)2]X2 (n-R = 3-MeO, 4-MeO and 4-tBu, X = NO3− and ClO4−) were synthesised and characterised. According to X-ray diffraction, the X anions tend to be coordinated to the Mn ions and may occupy the place of the monodentate ligand L. Two structural isomers that only differ in one of their monodentate ligands have been obtained with the 3-MeOC6H4COO− bridges. For all compounds, the Mn(III) ions display elongated octahedra with a pronounced rhombic distortion. To quantify these distortions separately, the elongation and rhombicity parameters Δ and ρ have been defined. The magnetic study shows a good relationship between the distortion of the coordination polyhedra and the zero field splitting parameters (DMn and EMn). From the magnetic data of a powder sample, it is possible to determine the sign and magnitude of DMn for ferromagnetic systems or weak antiferromagnetic systems with DMn < 0. For this kind of dinuclear compound, the R group at the meta position, the rhombic distortion of the octahedra, and large torsion angles between the Jahn-Teller axes lead to ferromagnetic interactions

Determination of ZFS parameters from the EPR spectra of mono-, di- and trinuclear MnII complexes: impact of magnetic coupling

A family of new MnII compounds, consisting of seven dinuclear, three mononuclear, and four trinuclear ones, were synthesised using benzoic acid derivatives n-RC6H4COOH, where n-R = 2-MeO, 3-MeO, 4-MeO, or 4-tBu, and 2,2′-bipyridine (bpy) or 1,10-phenantroline (phen) as blocking ligands. The crystal structures of nine of these compounds and the magnetic studies of all of them are reported here. Each type of compound was formed depending on the presence or absence of ClO4− ions, the solvent used, and/or the presence of a small amount of water in the reaction medium. The use of the tert-buthylbenzoate ligand gave unexpected results, very likely due to the steric hindrance caused by the voluminous tBu groups. The EPR spectra of each type of compound give some peculiar features that allow its identification. Attempts to fit these spectra have been made in order to determine the ZFS parameters, D and E, of the MnII ion (for mononuclear and dinuclear systems) or of the ground state (for trinuclear systems). For trinuclear systems, the single-ion ZFS parameters estimated from those of the ground state provided a good simulation of the EPR spectra of these compounds. The EPR signals observed in each case have been rationalised according to the energy level distribution and the plausible population in the excited states. In some particular situations, the sign of DMn could be determined from the fit of the EPR spectra of the antiferromagnetic dinuclear compounds, the source of the difference between the spectra lying in the second excited state

Diethyl 2,2'-[1,3-phenylenebis(methylthio)]dibenzoate

The title molecule, C26H26O4S2, assumes C2 symmetry with two C atoms and two H atoms of the central phenyl ring located on the twofold axis. The S atoms are synplanar with the benzene moiety, so the observed geometry is suitable for CS2 coordination. The o-(ethoxycarbonyl)phenylthiomethyl moiety is approximately planar and its orientation is almost perpendicular with respect to the central phenyl group

(Nitrato-κO)(triphenylphosphine-κP){3,6,9-trithiabicyclo[9.4.0]pentadeca-1(11),12,14-triene-κ3S3,6,9}mercury(II) nitrate hydrate hemiethanol solvate

In the title compound [Hg(NO3)(C12H16S3)-(C18H15P)][NO3].H2O.0.5C2H6O, the coordination sphere of the Hg2+ ion is a distorted trigonal bipyramid defined by the three S atoms of the trithiamacrocycle, the P atom of the triphenylphosphine group and an O atom of one nitrate group

6-Oxa-3,9-dithiabicyclo[9.4.0]pentadeca-1(11),12,14-triene

The title molecule, C12H16OS2, is partially disordered with the O and H atoms of the -CH2-O-CH2- group occupying two positions. The molecule assumes C2 symmetry and the twofold axis is located midway through the triene group and across the two partially occupied O-atom positions

[2,6-Bis(2-pyrimidinylthiomethyl)pyridine]dichlorocopper(II) methanol solvate

In the title compound [CuCl2(C15H13N5S2].CH3OH, the Cu2+ ion has square-pyramidal coordination geometry. The basal plane of the pyramid is formed by two Cl- ions, one pyridine N atom and one pyrimidine N atom. The fifth coordination site is occupied by the S atom of a thiomethyl group. The methanol molecule occupies an otherwise empty space in the structure