Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Spectroscopic Studies on Cu$^{2+}$ and Ca$^{2+}$ Binding with Glycosaminoglycans$^*$

  • Published : 1980.09.30
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Abstract

The Murrell-Fueno type of the intermolecular perturbation approach was applied to the acid-catalyzed hydrolysis of diformamide. The results show that: (1) the attack of a water molecule on the protonated carbonyl carbon is favored over that on the unprotonated carbonyl carbon; (2) the ${\sigma}$-approach model of water is preferred to the ${\pi}$-approach model; (3) the major contributing term to the total energy is the Coulomb energy, $E_q$, especially in the ${\sigma}$-approach, while the contribution of $E_{ct}$ (and $E_k$) increases moderately in the ${\pi}$-approach; (4) the reaction is a charge-controlled one, a hard-hard type in the language of the HSAB principle.

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