Triphenyl lead, tin and germanium coordination compounds derived from 9H-3-thia-1,4a,9-triaza-fluorene-2,4-dithione

Peña-Hueso, Adrián; Esparza‐Ruiz, Adriana; Ramos-Garcı́a, Iris; Flores‐Parra, Angelina; Contreras, Rosalinda

doi:10.1016/j.jorganchem.2007.11.040

Cited by 19 publications

(11 citation statements)

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“…These elements have shown great chemical versatility, as a result of their diverse electronegativities and their ability to increase their coordination spheres [10]. Germanium complexes are used in the fabrication of electronic components, chemotherapeutics, and as radioprotective agents [11], while complexes derived from heavier metals like tin and lead are relevant for their industrial applications as well as for their pharmacological and toxicological activities [11]. …”

Section: Introductionmentioning

confidence: 99%

Antioxidant Activity of Butyl- and Phenylstannoxanes Derivedfrom 2-, 3- and 4-Pyridinecarboxylic Acids

et al. 2010

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In vitro antioxidant activity for 12 stannoxanes derived from Ph3SnCl (compounds 1-3), Ph2SnCl2 (compounds 4-6), Bu3SnCl (compounds 7-9), and Bu2SnCl2 (compounds 10-12), was assayed qualitatively by the chromatographic profile with 1,1-diphenyl-2-picrylhydrazil (DPPH) method and by two quantitative methods: the DPPH radical scavenging activity and Ferric-Reducing Antioxidant Power (FRAP) assays. The results were compared with those obtained with the starting materials 2-pyridine- carboxylic acid (I), 3-pyridinecarboxylic acid (II) and 4-pyridinecarboxylic acid (III), as well as with standard compounds, such as vitamin C and vitamin E, respectively. The in vitro antiradical activity with DPPH of diphenyltin derivative 5 showed a very similar behavior to vitamin C at a 20 μg/mL concentration, whereas according to the FRAP method, compound 8 was better. This difference is due to the mechanism of the antioxidant process. The Structure-Activity Relationships (SAR) for both methods is also reported.

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Section: Introductionmentioning

confidence: 99%

Antioxidant Activity of Butyl- and Phenylstannoxanes Derivedfrom 2-, 3- and 4-Pyridinecarboxylic Acids

et al. 2010

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“…For van der Waals radii, see: Bondi (1964). For (4 + 2) coordination, see: Chan & Rossi (1997); Calatayud et al (2007); Turner et al (2008); Pena-Hueso et al (2008). For interactions, see: Sredojević et al (2010).…”

Section: Related Literaturementioning

confidence: 99%

catena-Poly[lead(II)-bis(μ-2-amino-1,3-benzothiazole-6-carboxylato)]

Zhang

Fang

et al. 2010

Acta Cryst E

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The title complex, [Pb(C8H5N2O2S)2]n, consists of one PbII ion located on a crystallographic twofold axis and two symmetry-related 2-amino-1,3-benzothiazole-6-carboxylate (ABTC) ligands. The central PbII ion has a (4 + 2) coordination by four O atoms of the two ABTC ligands and two weaker Pb—S bonding interactions (Pb—S secondary bonds) from S atoms of other two neighbouring ABTC ligands. These bonds link the metal ions into zigzag chains along the c axis, which, in turn, aggregate through π–π interactions [centroid–centroid distance = 3.7436 Å] between ABTC rings and N—H⋯O and N—H⋯N hydrogen bonds.

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“…We are interested in the preparation of organometallic tin compounds derived from biologically active molecules 1–5. One of the aims of our research is the structural analysis of the organometallic tin compounds, particularly their coordination modes, which has influence in the biological effects.…”

Section: Introductionmentioning

confidence: 99%

Organometallic Tin Compounds Derived from 2‐Benzimidazole Propionic Acid

Camacho‐Camacho

Esparza‐Ruiz

Peña-Hueso

et al. 2013

Zeitschrift anorg allge chemie

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Reactions of 2‐benzimidazole propionic acid (1) with [Sn(nBu)3]2O and SnPh3OH gave mononuclear organometallic tin esters 2 and 3, respectively, where 1 is coordinated to the tin atom through the carboxylate group. Further reactions of 2 with DMSO and 3 with methanol, ethanol, pyridine, DMSO, THF and water afforded the corresponding tin compounds coordinated by the base 4–10, respectively. X‐ray diffraction analyses of 5, 6 and 10 were obtained. The solid‐state structures showed that the ligand 1 is bound through both oxygen atoms of the carboxylic group with the Lewis base anti to it. Reaction of 1 with di‐n‐butyltin oxide produced a tetranuclear distannoxane (11) by the association of four Sn(nBu)2 groups, two oxygen atoms and four ligands. Four of the oxygen atoms are tricoordinate. The tin atoms are hexacoordinate with distorted octahedral geometries. The macromolecule has in total seven fused rings. Five of them are four membered rings arranged in a ladder‐type arrangement and the other two are six membered rings. The aliphatic chains and the benzimidazole groups are perpendicularly oriented to the polycyclic arrangement giving a sandwich with polar bonds in the middle and covered by the aliphatic and aromatic groups. In all compounds the ligands showed a chiral helicoidal preferred conformation.

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Triphenyl lead, tin and germanium coordination compounds derived from 9H-3-thia-1,4a,9-triaza-fluorene-2,4-dithione

Cited by 19 publications

References 50 publications

Antioxidant Activity of Butyl- and Phenylstannoxanes Derivedfrom 2-, 3- and 4-Pyridinecarboxylic Acids

Antioxidant Activity of Butyl- and Phenylstannoxanes Derivedfrom 2-, 3- and 4-Pyridinecarboxylic Acids

catena-Poly[lead(II)-bis(μ-2-amino-1,3-benzothiazole-6-carboxylato)]

Organometallic Tin Compounds Derived from 2‐Benzimidazole Propionic Acid

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