Publications

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2001
Aviles, T., A. Dinis, M. J. Calhorda, P. Pinto, V. Felix, and M. G. B. Drew. "Synthesis, X-ray structure, and theoretical studies of novel cationic mono-cylopentadienyl complexes of Co(III): the orthometalation of trans-azobenzene." J Organomet Chem. 625 (2001): 186-194. AbstractWebsite

New cationic mono-cyclopentadienyl complexes of Co(III) containing mono or bidentate nitrogen donor ligands of general formula [Co(eta (5)-C5H5)(PPh3)L-2][BF4](2) (L = NC-CH3, 2, and NC = Ph, 3) or [Co(eta (5)-C5H5)(PPh3)(L-L)[BF4](2), [L-L = 2,2 ' -bisimidazole (H(2)biim) (4) and dipyridylamine [HN(NC5H5)(2)] (5) have been synthesised by the stoichiometric reaction of the Co(III) complex Co(eta (5)-C5H5)(PPh3)I-2 (1), with Ag[BF4] and the appropriate ligand in CH2Cl2. Under the same conditions and using;trans-azobenzene as a ligand, an orthometalation reaction took placet giving the new compound [Co(eta (5)-C5H5)(PPh3)(kappa -C,kappa -N-C6H4N=NPh)][BF4] (6) in high yield. The structural characterisation of compounds 4 and 6, and of the starting compound Co(eta (5)-C5H5)(PPh3)I-2 (1) was done by single-crystal X-ray diffraction studies. DFT calculations (ADF program) were performed in order to understand the orthometallation reaction. (C) 2001 Elsevier Science B.V. All rights reserved.

2000
Aviles, T., A. Dinis, M. G. B. Drew, and V. Felix. "A novel infinite 1-D chain of Silver(I) bridged by trans-azobenzene." Monatsh Chem. 131 (2000): 1305-1310. AbstractWebsite

The self-assembly of Ag[BF(4)] with trans-azobenzene in dichloromethane yields a new coordination polymer ([Ag(mu -trans-azobenzene)H(2)O] [BF(4)])(n) which was characterized by X-ray single crystal diffraction. The crystal consists of 1-D zigzag cationic chains made up from [Ag(H(2)O)](+) units linked by trans-azobenzene bridges and BF(4)(-) anions. Hydrogen bonding interactions between the chains and BF(4)(-) anions occur via intermolecular C-H . . .F and O-H . . .F contacts, and the crystal displays a 2-D supramolecular structure.

Pinto, P., M. J. Calhorda, V. Felix, T. Aviles, and M. G. B. Drew. "Syntheses and crystal structures of polynuclear Cu(I) complexes containing the 1,1 '-bis(diphenylphosphino)-ferrocene ligand." Monatsh Chem. 131 (2000): 1253-1265. AbstractWebsite

The reaction between [Cu(NCMe)(4)][PF6] and 1,1'-bis-(diphenylphosphino)-ferrocene (dppf) in several ratios, solvents, and conditions led to the synthesis and structural characterization of the Cu(I) complexes [Cu(dppf)(Odppf)] [PF6] (1), [(dppf)Cu(mu -dppf)Cu(dppf)][PF6](2) (2), and [(dppf)Cu(mu -Cl)(2)Cu(dppf)] (3). Although 1 and the cation in 2 were known, the first was structurally characterized for the first time, exhibiting a significant asymmetry in the coordination sphere of Cu(I)) owing to the presence of oxygen. In 2, the PF6- anion led to an interesting crystal packing with large open channels containing water. Finally, DFT calculations on a model of 3 showed that its HOMO exhibits, besides Fe, a significant Cu and Cl character, which is reflected in its electrochemical properties.

1988
Teixeira, G., T. Aviles, A. R. Dias, and F. Pina. "{A KINETIC-STUDY OF PHOTOSUBSTITUTION OF CARBON-MONOXIDE AND TRIPHENYLPHOSPHINE IN COMPLEXES MN(ETA-5-CH3C5H4)(CO)3-N(PPH3)N (N=0, 1 AND 2)}." {JOURNAL OF ORGANOMETALLIC CHEMISTRY}. {353} (1988): {83-91}. Abstract

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Teixeira, G., T. Aviles, A. R. Dias, and F. Pina. "A Kinetic-Study of Photosubstitution of Carbon-Monoxide and Triphenylphosphine in Complexes Mn(Eta-5-Ch3c5h4)(Co)3-N(Pph3)N (N=0, 1 and 2)." J Organomet Chem. 353 (1988): 83-91. AbstractWebsite
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1979
Aviles, T., M. L. H. Green, A. R. Dias, and C. Romao. "Mono(Cyclopentadienyl)Molybdenum Chemistry - Hydrido-Derivatives, Halogeno-Derivatives, Allylic, and Butadiene Derivatives of [1,2-Bis(Diphenylphosphino)Ethane](Eta-Cyclopentadienyl)Molybdenum and Related Compounds." J Chem Soc Dalton (1979): 1367-1371. AbstractWebsite
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