Evaluation of Stability Constant of Ternary Intermediate Complex Formation in Mnii Catalysed Periodate Oxidation Of2, 5-Xylidine by Stopped Flow Method

Abstract

Although proposed in many cases, the ternary complexation during periodate oxidation of majority of anilines catalyzed by metals like Mn II , has not been thoroughly subjected to investigations particularly from point of view of evaluation of stability constant of the ternary complex formed and collecting the supporting evidences. In this paper, the formation of ternary intermediate unstable complex 2,5-XYL -Mn II -IO4 -during Mn II catalyzed reduction of periodate by 2,5-xylidine(2,5-XYL) has been explored and its stability constant has been evaluated. Its value of (2.0 ± 0.66) × 10 6 has been found to be in good agreement with that calculated from rate equation derived by us on the basis of kinetic studies made by using stopped flow method. As evidenced from the stopped flow trace, the formation of complex is comparatively faster than its decomposition into other reaction products. The kinetics of ternary complexation is given by the Eqn.

EXTRACTION OF Co(II) AND Cu(II) FROM WASTE MATERIALS WITH SEMICARBAZONE OF 4- NITROBENZALDEHYDE

“…There are a few reports accessible within the literature concerning the kinetic spectrophotometric estimation of Mn II , based on the reduction of periodate ion by some substrates. [29][30][31][32][33] The reports are available on stability constant for the ternary intermediate complex formation between aromatic amine, Mn II and periodate 34 . Most of the precious metal is very essential for human beings, so these are extracted from waste material.…”

KINETIC-SPECTROPHOTOMETRICDETERMINATION OF pBROMOANILINEAT THE MICROGRAM LEVEL

“…[15][16][17][18][19][20][21][22][23][24] Some reports are available on Evaluation of stability constant of ternary intermediate complex formation in Mn II catalyzed periodate oxidation of 2,5-xylidine by stopped flow method. 31 Some aniline was investigated as fabrication of polyaniline nanofiber modified carbon paste electrodes (GOx/MCPE) 32 . The detailed kinetic-mechanistic studies on Mn II catalyzedthe reduction of periodate by p-Bromoanilinehas also been reported.…”