A simple and sensitive spectrophotometric method for the assay of two antihistamines, astemizole and loratadine, is described. The determination was based on the formation of chargetransfer complexes between chloranilic acid as a p acceptor and the studied drugs as n-donors in acetonitrile solvent. The spectra, various experimental parameters, composition and formation constant of the complexes...

Nine drugs viz., Famotidine, Ketorolac tromethamine, Dextromethorphan, Quetiapine, Salmeterol, Sumatriptan, Tamoxifen, Torsemide and Pantoprazole turned the pale yellow colour of reagent viz., p-chloranilic acid, in CH3CN, to purple and exhibited a band at 520nm due to anion of the reagent whose intensity increased with increase in the concentration of the drugs and formed a basis for quantitat...

The co-crystal of phenazine (Phz) and chloranilic acid (H2ca) becomes ferroelectric upon cooling through the loss of inversion symmetry. Further cooling results in the development of an incommensurate ferroelectric phase, followed by a lock-in transition towards a twofold superstructure. Here we present the incommensurately modulated crystal structure of Phz-H2ca at T = 139 K with a symmetry gi...

In the present study, four simple, rapid, and sensitive charge-transfer spectrophotometric methods were developed for the determination of esmolol hydrochloride (ESM). 2,3-Dichloro-5, 6-dicyano-1, 4-benzoquinone, 1-chloro 2,4-dinitro benzene, 2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione (chloranilic acid), and sodium 3,4-dioxo-3,4-dihydronaphthalene-1-sulfonate (Folin’s reagent) were...

Reaction of chloranilic acid with SnCl(4), Ca(NO(3))(2) and Et(4)NBF(4) in aqueous acetone yields (Et(4)N)(2)[Sn(IV)Ca(II)(can)(4)]. 2 Me(2)CO which contains 2D coordination polymer sheets of composition [Sn(IV)Ca(II)(can)(4)](2-). Both metals are 8-coordinate and act as 4-connecting nodes to form a square grid containing "square" holes. The anionic sheets are electrostatically bound together b...