Juan Carlos Avila-Rosón

University of Granada | UGR · Department of Analytical Chemistry

The crystal structure of bright-red crystals of the bidimensional polynuclear diamagnetic (µ-chloro)(µ-pyrazine)copper(I) complex has been analyzed from X-ray diffraction data. The structure was solved by the heavy-atom method. Full-matrix least-squares refinement based on 673 reflections with F > 4σ(F) converged to a final R = 0.043 and Rw = 0.048...

Palladium complexes of the type PdL2 (where L=2,3- and 2,4-dimethylphenylglycinato, 2,6-dimethylphenyl-(carboxymethyl) glycinato and 4-ethylphenyl (carboximethyl) glycinato anions) were synthesized in aqueous medium and studied by I.R., H-NMR, magnetic measurements and DSC techniques. The complexes present a trans-square planar structure with two b...

We have studied the presence in the environment of the polycyclic aromatic hydrocarbon benzo[a]pyrene (BaP) in the city of Granada using room-temperature phosphorescence (RTP) applied to microemulsions. A detailed study into the different compositions of several normal microemulsion together with experimental variables (heavy atom, deoxygenate agen...

The reaction of cis-[PdCl2(PPh3)(2)] with 8-(methylthio)-theophylline (HL) leads to the formation of trans-[PdCl(L)(PPh3)(2)], an N(7)-Pd-bonded complex, which under mild conditions converts into the mixed-ligand complex trans-[Pd(L')(PPh3)(2)] (HL' is theophylline). Noteworthy, the latter represents the first example of a C(8)-Pd-bonded complex.

The title complex, [Zn(C12H13NO4)(H2O)(2)], has a coordination polyhedron around the Zn-II atom that can be described as a square-based pyramid strongly distorted towards a trigonal bipyramid. The basal plane is defined by one N and two O atoms belonging to the tridentate ligand and one water O atom, while the axial position is occupied by another...

The structure of the title compound [(ammine)(aqua)(2,6-dimethylphenyliminodiacetato-N,O,O '')copper(II)] consists of discrete neutral [CU(C12H13NO4)(H2O>(NH3)] molecules. The Cu atom is five-coordinate, with four short bonds formed with the N atom and two O atoms of the doubly deprotonated ligand and the N atom of the ammonia molecule. The water m...

The (4+1) coordination environment around Cu-II in the title compound, [CU(C12H13NO4)(H2O)(2)] [diaqua-(2-ethylphenyliminodiacetato-N,O,O '')copper(II)], can be described as square pyramidal, distorted towards trigonal bipyramidal. The basal coordination positions are occupied by one N and two O atoms from the doubly deprotonated ligand, and one O...

The structure of the title compound, C12H12N6O4, consists of independent tricyclic molecules with a central pyrazine ring and terminal pyrimidine rings. The molecular centroid coincides with a crystallographic inversion centre, leading to a trans disposition of the terminal pyrimidine rings. The angle between the central pyrazine ring and the pyrim...

The compound [Cu(ox)(py)2](ox = oxalate, py = pyridine) was obtained as a breakdown oxidized product of [Cu(epgly)2](Hepgly =N-2-ethylphenylglycine), and has been characterized by means of structural and magnetic measurements. The crystals are monoclinic, space group C2/c, with a= 14.088(3), b= 11.023(2), c= 8.689(2)Å, β= 92.23(3)° and Z= 4. The st...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

The preparation, spectroscopic and magnetic study, and crystal structure of the complex {μ-pyrazine}bis[(aqua)(2,6- xylylaminodiacetato)copper(II)], [Cu2(L)2(H2O)2(pyz)], are reported. It crystallizes in the monoclinic space group P21/n with cell constants a=13.309(3), b=7.590(2), c=15.459(3) Å, β=100.90(3)°, Z=2, R=0.038, Rw=0.045. The structure c...

The complexes [M(H2O)2)(L)2], (where M = Zn2+ or Cd2+ and L is the 8-methylthiotheophyllinato anion) have been prepared and characterized by means of IR and 1H and 13C NMR spectral studies. The crystal structure of [Zn(H2O)2(L)2] has been determined by single-crystal x-ray methods. The complex crystallizes in the monoclinic system, space group C2/c...

The preparation, spectroscopic study and crystal structure of the complex bis(8-methylthiotheophyllinato) bis(pyridine)copper(II), [Cu(L)2(py)2], are reported. The complex crystallizes in the monoclinic system, space group P21/c with a=7.502(2), b=20.352(4), c=9.757(2) Å, β=98.67(3)° and Z=2. The structure was solved for 4056 non-zero Mo Kα reflect...

The thermal behaviours of 4-ethylphenylamino-N,N-diacetic acid (H2EFAD) and its monosodium salt have been investigated from their TG and DSC curves. Likewise, some 4-ethylphenylamino-N, N-diacetato compounds of several di- and trivalent metal ions have been synthesized, characterized and studied by TG and DSC. Most of these compounds show a 1 ∶ 1 s...

The thermal properties of Pd(II) complexes of some N-arylglycine derivatives were determined using TG, DTG and DSC techniques. IR spectroscopy was applied to clarify the decomposition steps.

2,3-Xylyliminodiacetato compounds of Al(III), Cr(III), Fe(II), Co(II), Ni(II), Zn(II), Cd(II), Ba(II) and Pb(II) have been prepared and studied by IR spectroscopy and thermal analysis. The thermal behaviour of these compounds has been studied using TG, DTG and DSC techniques. Dehydration energies have been calculated.