Paper Information

Journal:   JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)   DECEMBER 2010 , Volume 7 , Number 4; Page(s) 864 To 874.
 
Paper: 

VERY STRONG CENTROSYMMETRIC [O...H...O]+AND ASYMMETRIC [O-H…O]+ HYDROGEN BONDS IN A NEW POM-BASED HYBRID MATERIAL

 
 
Author(s):  POURAYOUBI M., MAHJOUB A.R.*
 
* DEPARTMENT OF CHEMISTRY, TARBIAT MODARES UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

A specific assembly process, driven by coexisting X-H…O hydrogen bonding and X…O short intermolecular contacts (X=C, N, O) is described, in which the pseudo -Keggin polyoxoanion and two types of molecule. . . cation pairs (with C1 and Ci symmetries) were assembled to the programmed supramolecular architecture. Cooperation of the positive-charge, resonance effect and the O=C…Oterminal intermolecular contact led to the short and strong symmetrical [O…H…O]+ hydrogen bond (O…O= 2.449 (13) Å) in one of the molecule…cation pairs [C4H9NO…H…ONC4H9]+ with the H-bonded proton in the center of inversion.
The other [C4 H9 NOH…ONC4 H9]+ molecule…cation pair (non-centrosymmetric) was formed through a very strong asymmetric [O. H. O]+hydrogen bond of 2.431 (13) Å in length which was created via the synergistic effect between the minor N-H…O secondary interaction, +CAHB (positive-charge-assisted hydrogen bond) and RAHB (resonance assisted hydrogen bond) mechanisms.

 
Keyword(s): STRONG HYDROGEN BOND, CRYSTAL STRUCTURE, ORGANIC/INORGANIC HYBRID, POLYOXOMETALATE
 
References: 
  • ندارد
 
  pdf-File tarjomyar Yearly Visit 93
 
Latest on Blog
Enter SID Blog