22537-51-5Relevant articles and documents
Chromium(III)-catalysed Oxidation of Antimony(III) by Alkaline Hexacyanoferrate(III) and Analysis of Chromium(III) in Microamounts by a Kinetic Method
Nandibewoor, Sharanappa T.,Morab, Vidyavati A.
, p. 483 - 488 (1995)
The oxidation of antimony(III) by hexacyanoferrate(III) has been studied in alkaline media.A microamount of chromium(III) (1E-6 mol dm-3) is sufficient to catalyse the reaction.The active species of catalyst and oxidant in the reaction are understood to be (1-) and (3-).The autocatalysis exhibited by one of the products, i.e. antimony(V), is attributed to complex formation between antimony(V) and (3-).A composite mechanism and rate law are proposed.The reaction has been utilised for the analysis of chromium(III) in the range 5.2 ng cm-3-1.14 μg cm-3.
Kinetics and Mechanism of the Silver(I)-catalyzed Oxidations of Arsenic(III) and Antimony(III) with Peroxodiphosphate in Acetate Buffers
Gupta, Bharati,Gupta, Krishna Swaroop,Gupta, Yugul Kishore
, p. 1873 - 1876 (1984)
A kinetic study of the silver(I)-catalyzed oxidations of AsIII and SbIII with peroxodiphosphate (pdp) was performed by estimating AsIII and SbIII with permanganate.The oxidation of AsIII was found to conform to the rate law (i) in the range pH 2.10-4.52, where K2 and K3 are the acid-dissociation constants of H3P2O8- and H2P2O82-; k1/K2 and k2 were found to be (5.0+/-0.2)*104 dm9mol-3s-1 and 38+/-3 dm6mol-2s-1 at 50 deg C.The oxidation of SbIII was first order in III>, , and I>, and independent of pH, , and ; the third-order rate was found to be 18+/-1 dm6mol-2s-1 at 50 deg C in the range pH 3.00-4.61.The silver(I) catalysis operates through complex formation of pdp and AgI rather than AgI/AgIII redox cycling.
Bromide mediated oxidation of antimony(III) by cerium(IV) in aqueous sulphuric acid medium
Munavalli,Thabaj,Chimatadar,Nandibewoor
, p. 1579 - 1584 (2008/03/27)
The micro amount (10-3 mol dm-3) of bromide mediated oxidation of antimony(III) by cerium(IV) in an aqueous sulphuric acid medium has been studied spectrophotometrically at 25°C and I = 3.10 mol dm -3. In the presence of bromide, one mole of antimony(III) requires two moles of cerium(IV). The reaction is first order with respect to [cerium(IV)] and [bromide], whereas the order with respect to [antimony(III)] is less than unity. Increase in [sulphuric acid] accelerates the reaction rate. The order with respect to [H+ ion] is less than unity. Added products, cerium(III) and antimony(V) do not have any significant effect on the rate of reaction. The active species of oxidant is identified as H 3Ce(SO4)4-, whereas that of reductant as SbBr2+. The possible reaction mechanism is proposed and the activation parameters determined and discussed.
Hexacyanoferrate(III) oxidation of antimony(III) in aqueous acetic acid
Chimatadar, S. A.,Nandibewoor, S. T.,Raju, J. R.
, p. 231 - 234 (2007/10/02)
The rate of hexacyanoferrate(III) oxidation of antimony(III) in 50percent aq. acetic acid (v/v) in the presence of H+ and Cl- ions is considerably accelerated with increase in +> and -> as well as increase in acetic acid content of the medium.The experimental results indicate that the reaction occurs mainly between H2Fe(CN)6- and SbCl4-.
