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Thiourea Compounds (thiourea + compound)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Synthesis of Substituted Heterocyclic Thiourea Compounds.

CHEMINFORM, Issue 11 2008
T. K. Venkatachalam
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Synthesis of ,-Fluorophenethyl Halopyridyl Thiourea Compounds as Non-nucleoside Inhibitors of HIV-1 Reverse Transcriptase.

CHEMINFORM, Issue 49 2004
T. K. Venkatachalam
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Synthesis, Structural Diversity, and Ligand-Transfer Potential of (Carbene)copper(I) Complexes

HELVETICA CHIMICA ACTA, Issue 6 2009
Galmari Venkatachalam
Abstract Copper(I) complexes comprising different N-heterocyclic carbene ligands were prepared via in situ deprotonation and metallation. Depending on the wingtip groups on the carbene ligand (alkyl vs. aryl, chelating or monodentate), a variety of different structural motifs were identified, such as a trigonal planar geometry (alkyl wingtips) and an unprecedented see-saw-type structure (pyridinyl wingtip groups). While aryl wingtip groups increase the stability of the complexes, alkyl substituents induce rapid demetallation in the presence of moisture. The reactivity of these complexes was used to establish a carbene-transfer protocol, which is illustrated by the formation of new cyclic thiourea compounds (transfer to sulfur) and new (carbene)ruthenium(II) complexes (transfer to ruthenium). This suggests that (carbene)copper(I) complexes could become valuable alternatives to (carbene)silver(I) complexes for synthesizing (carbene)metal systems via transmetallation. [source]

Cyanide Sensing with Organic Dyes: Studies in Solution and on Nanostructured Al2O3 Surfaces

CHEMISTRY - A EUROPEAN JOURNAL, Issue 10 2008
Nélida Gimeno
Abstract The synthesis of two new azo phenyl thiourea compounds and their optical response to different anions is reported herein. Solution studies in methanol indicate that cyanide induces a colour change in these dyes (whereas no changes are observed in the presence of other anions, such as F,, Cl,, Br,, CH3COO,, H2PO4,, HSO4,). Interestingly, in DMSO these dyes are responsive not only to cyanide, but also to fluoride, acetate and dihydrogen phosphate. Each of these anions induces a different colour change. In the second part of the paper, we report the attachment of one of these dyes onto nanostructured TiO2 and Al2O3 films. The stability of these sensitised films to pH was studied and we concluded that the sensitised Al2O3 films are more robust, and hence, better than the TiO2 for anion sensing. The dye-sensitised Al2O3 films were immersed in solutions of different anions and their response studied. The films can detect cyanide down to 3,ppm in aqueous solution with relatively good selectivity over other anions. [source]