The structure of marmin, a new coumarin of aegle marmelos correa

Abstract

po in t s were s h a r p and the r ise in po ten t i a l a t t h e end p o i n t was of the order of 80 -100 inV. for 0 . t0 ml. of d i c h r o m a t e added. About hal f an h o u r is r equ i red for t h e po t en t i a l to reach a s t e a d y va lue a t t h e end point . A typ ica l cu rve for t he t i t r a t i on of 0"05 N so lu t ion of iodide w i t h 0"05 N so lu t ion of d i c h r o m a t e is s h o w n in Fig. 1. W e h a v e also obse rved t h a t t h e t i t r a t i o n is poss ible a t t hese acidi t ies on ly if oxa l a t e equa l to or more t h a n t h e concent r a t i on (in equ iva len t s ) of iodide is added . E i t h e r su lphu r i c acid or hydroch lo r i c acid can be e m p l o y e d w h e n t h e ac id i ty is kep t a t 0,25 N. A t h ighe r acidi t ies hydroch lo r ic acid is n o t s a t i s f ac to ry b u t su lphu r i c acid gives good values . U n d e r t h e cond i t ions emp loyed no r eac t ion be t ween d i c h r o m a t e and oxalic acid t a k e s p lace a n d t he d i c h r o m a t e c o n s u m e d is s t ioch iomet r i ca l ly e q u i v a l e n t to t h e iodide p r e s e n t accord ing to t h e e q u a t i o n ;

DOI: 10.1007/BF00601207

1 Figure or Table

Cite this paper

@article{Chatterjee2004TheSO, title={The structure of marmin, a new coumarin of aegle marmelos correa}, author={Asima Chatterjee and Anima Choudhury}, journal={Naturwissenschaften}, year={2004}, volume={42}, pages={512-512} }