نتایج جستجو برای: tetrazolium salts

تعداد نتایج: 28922  

Journal: :Acta crystallographica. Section A, Foundations of crystallography 2004
D Marabello R Bianchi G Gervasio F Cargnoni

The experimental electron density rho(r) of the two isomorphic salts KMnO(4) and KClO(4) was determined by a multipole analysis of accurate X-ray diffraction data at 120 K. The quantum theory of atoms in molecules was applied to rho(r) and to its Laplacian nabla(2)rho(r). The bonds were characterized using the topological parameters at the bond critical points of the density rho(r), nabla(2)rho...

Journal: :Journal of the American Chemical Society 2003
Leanne Beer James F Britten Jaclyn L Brusso A Wallace Cordes Robert C Haddon Mikhail E Itkis Douglas S MacGregor Richard T Oakley Robert W Reed Craig M Robertson

New synthetic routes to 1,2,3-dithiazolo-1,2,3-dithiazolylium salts, based on double Herz condensations of N-alkylated 2,6-diaminopyridinium salts with sulfur monochloride, have been developed. The two prototypal 1,2,3-dithiazolo-1,2,3-dithiazolyl radicals HBPMe and HBPEt have been prepared and characterized in solution by cyclic voltammetry and EPR spectroscopy. Measured electrochemical cell p...

Journal: :Chemical communications 2011
Shigeo Kohmoto Ryota Tsuyuki Yujiro Hara Akira Kaji Masahiro Takahashi Keiki Kishikawa

Amphiphilic anthracene derivatives showed solvent-polarity-dependent fluorescence. Monomer emission and aggregation-induced emission (AIE) were observed in polar and non-polar organic solvents, respectively. AIE became predominant in aqueous solution in the case of hexafluorophosphate as a counter anion.

Journal: :Molecules 2011
Rachel R Butorac Salem S Al-Deyab Alan H Cowley

The syntheses of four new bis(imino)acenaphthene (BIAN) imidazolium chlorides are reported, three of which have been structurally characterized. The synthesis of a new, structurally authenticated BIAN ligand is also described. We report the results of the use of these BIAN imidazolium salts as antimicrobials against the pathogens S. aureus, B. subtilis, E. coli and P. aeruginosa. The antimicrob...

Journal: :Chemical communications 2012
Alessandro Piccinini Sarah A Kavanagh Stephen J Connon

The highly efficient asymmetric epoxidation of aldehydes by methylene transfer is now possible using new sulfonium salts.

Journal: :Organic & biomolecular chemistry 2014
James D Firth Peter O'Brien Leigh Ferris

The improved performance of the sparteine surrogate compared to sparteine in a range of applications has highlighted the need to develop an approach to the (-)-sparteine surrogate, previously inaccessible in gram-quantities. A multi-gram scale, chromatography-free synthesis of the racemic sparteine surrogate and its resolution via diastereomeric salt formation with (-)-O,O'-di-p-toluoyl-l-tarta...

Journal: :Chemical communications 2013
Alba Collado Adrián Gómez-Suárez Anthony R Martin Alexandra M Z Slawin Steven P Nolan

An improved protocol for the synthesis of [Au(NHC)X] (X = Cl, Br, I) complexes is reported. This versatile one-step synthetic methodology proceeds under mild conditions, in air, using technical grade solvents, is scalable and is applicable to a wide range of imidazolium and imidazolidinium salts.

Journal: :Chemical communications 2015
Anne-Chloé M A Nassoy Piotr Raubo Joseph P A Harrity

Azetidine and oxetane sulfinate salts are easily prepared from commercially available 3-iodoheterocycle precursors in a three-step sequence. They undergo smooth coupling reactions thereby providing an expedient route for the introduction of these four-membered heterocycles into indoles.

2015
Robert D Wojtyczka Andrzej Zięba Arkadiusz Dziedzic Małgorzata Kępa Danuta Idzik

Microorganisms present in different environments have developed specific mechanisms of settling on various abiotic and biotic surfaces by forming a biofilm. It seems to be well justified to search for new compounds enabling biofilm reduction, which is highly resistant to antibiotics. This study was thus an initial assessment of the antibacterial activity of two new quinoline derivatives of a st...

Journal: :Molecules 2004
Zita Puterová Alzbeta Krutosíková Antonín Lycka Tatiana Durceková

A series of new push-pull compounds were synthesised by reaction of 5-aryl- furan-2-carboxaldehydes and furo[b]pyrrole type aldehydes with benzothiazolium salts. These new condensation products represent highly conjugated systems that have potential biological activity. The reaction of furo[b]pyrrole type aldehydes with benzothiazolium salts give potential precursors of cyanine dyes.

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