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<p>Thermodynamic characteristics of L-arginine oscillating system catalyzed by tetraazamacrocyclic nickel(II) complex</p>

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Title Statement <p>Thermodynamic characteristics of L-arginine oscillating system catalyzed by tetraazamacrocyclic nickel(II) complex</p>
 
Added Entry - Uncontrolled Name Ren, Lijun ; Baoji University of Arts and Sciences
 
Uncontrolled Index Term Thermodynamics
Oscillatory systems, Chemical oscillating reactions, Amino acids, Arginine oscillatory system, Induction period, Oscillating period, Irreversible chemical reactions, Kinetic parameters, Thermodynamic parameters, Nickel
 
Summary, etc. <p>A novel oscillating system with L-arginine (Arg) as organic substrate, catalyzed by a tetraazamacrocyclic nickel(II) complex (NiL(ClO<sub>4</sub>)<sub>2</sub>, (L: 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazabutadecacyclo-7,14-diene) is reported for the first time. The system has been quantitatively characterized by kinetic parameters, including the rate constants (<em>k</em><sub>in</sub>, <em>k</em><sub>p</sub>), the apparent activation energies<em> </em>(<em>E</em><sub>in</sub>, <em>E</em><sub>p</sub>), the pre-exponential constants (<em>A</em><sub>in</sub>, <em>A</em><sub>p</sub>), and the thermodynamic functions (∆<em>H</em><sub>in</sub>, ∆<em>G</em><sub>in</sub>, ∆<em>S</em><sub>in</sub>, ∆<em>H</em><sub>p</sub>, ∆<em>G</em><sub>p</sub>, ∆<em>S</em><sub>p</sub>). The results indicate that the NiL(ClO<sub>4</sub>)<sub>2</sub> can catalyze the Arg oscillating reaction, exhibiting features of irreversible thermodynamics as shown by the negative entropy of the oscillating system. Further, the two active groups of the Arg oscillating system can be activated at higher acidity. A possible mechanism is also proposed for the Arg oscillating system catalyzed by NiL(ClO<sub>4</sub>)<sub>2</sub>.</p>
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-10-19 12:58:13
 
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http://op.niscair.res.in/index.php/IJCA/article/view/18604
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 57, ##issue.no## 5 (2018): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/18604/57319
http://op.niscair.res.in/index.php/IJCA/article/download/18604/57321
 
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