Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   AMIRKABIR   Summer 2003 , Volume 14 , Number 55-C; Page(s) 167 To 169.
 
Paper: 

NUCLEAR MAGNETIC RESONANCE STUDY OF CHARGE TRANSFER COMPLEX FORMATION BETWEEN SILVER NITRATE AND BENZYLCYANIDE IN SOLVENT ETHYLENE GLYCOL

 
 
Author(s):  MODARES H., SHEKAARI H.
 
* 
 
Abstract: 

The formation constant for charge transfer complexes between electron acceptor (AgNO3) and electron donor benzylcyanide (C6 H5 -CH2 -C ? N) in solvent ethylene glycol [(CH2OH) 2] has been evaluated by using the Nuclear Magnetic Resonance (NUR) chemical shifts of aromatic group of benzylcyanide measured against external references, tetrametylsilane (TMS), hexamethyldisilane (HMDS) and cylohexane (CXA) at 20 °C. The external referencing procedure eliminated the interference of internal reference in the course of complexation. The necessary bulk magnetic susceptibility corrections on the measured chemical shifts have been made. The solution nonidealities and their effects on tire formation constant have been considered and a new equation has been suggested to obtain the mean ionic activity coefficient of AgNO3 from NMR results. The mean ionic activity coefficient has been taken into account in the formation constant calculations. I The results indicated that the appropriate formation constant should be expressed in terms of activities Also an equation have been derived to eliminate the undesirable effects on the NMR measured chemical shifts in calculating the formation constant. The selection of concentration domains and its effect on the calculated formation constant has been discussed and the new equation is modified to be independent of the concentration domains. In this equation the solution nonidealities, by considering the activity coefficients, have been taken into account.

 
Keyword(s): FORMATION CONSTANT, SILVER NITRATE, BENZYLCYANIDE, ETHYLENE GLYCOL, CHARGE TRANSFER COMPLEXES, SOLUTION NONIDEALITIES, CONCENTRATION SCALE, BULK MAGNETIC SUSCEPTIBILITY, NMR
 
References: 
  • ندارد
 
  Yearly Visit 71
 
Latest on Blog
Enter SID Blog