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Int. J. Mol. Sci. 2003, 4(6), 362-370; doi:10.3390/i4060362
Article

Comparative Studies on Prussian Blue or Diaquatetraaminecobalt(III) Promoted Hydrolysis of 4-Nitrophenylphosphate in Microemulsions

Received: 7 March 2003; Accepted: 10 April 2003 / Published: 31 May 2003
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Abstract: Comparative reactivities of three diaqua(tetraamine)Co(III) complexes towards hydrolysis of 4-nitrophenyl phosphate was undertaken. The results were contrasted with prussian blue promoted hydrolysis of 4-nitrophenyl phosphate. The tetraamineCobalt(III) complexes accelerated the hydrolytic reaction to varying degrees with the following reactivity order. [(tn)2Co(OH2)2]3+ < [(trpn)Co(OH2)2]3+ < [(tme)2Co(OH2)2]3+ [ tn = trimethylenediamine; tme = 1,1,2,2-tetramethyl-1,2-diaminoethane; trpn = tris(3- aminopropyl)amine].These observations are attributed to the active aquo-hydroxo forms of the tetraamineCobalt(III) complexes. The hydrolysis rate for prussian blue promoted hydrolysis was comparable to that obtained for [(tme)2Co(OH2)2]3+. The mixed valence bimetallic centers of prussian blue aid in substrate binding and organizing the nitrophenyl phosphate for effective intramolecular nucleophilic attack by coordinated hydroxide or water.
Keywords: Nitrophenyl phosphate; Hydrolysis; Microemulsion; TetraamineCobalt(III); Mixed valence bimetallic center Nitrophenyl phosphate; Hydrolysis; Microemulsion; TetraamineCobalt(III); Mixed valence bimetallic center
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MDPI and ACS Style

Tafesse, F. Comparative Studies on Prussian Blue or Diaquatetraaminecobalt(III) Promoted Hydrolysis of 4-Nitrophenylphosphate in Microemulsions. Int. J. Mol. Sci. 2003, 4, 362-370.

AMA Style

Tafesse F. Comparative Studies on Prussian Blue or Diaquatetraaminecobalt(III) Promoted Hydrolysis of 4-Nitrophenylphosphate in Microemulsions. International Journal of Molecular Sciences. 2003; 4(6):362-370.

Chicago/Turabian Style

Tafesse, Fikru. 2003. "Comparative Studies on Prussian Blue or Diaquatetraaminecobalt(III) Promoted Hydrolysis of 4-Nitrophenylphosphate in Microemulsions." Int. J. Mol. Sci. 4, no. 6: 362-370.


Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert