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The hydrolysis process of the anticancer complex [ImH][trans-RuCl4(Im)2]: a theoretical study
Jincan Chen1, Lanmei Chen, Siyan Liao
1School of Chemistry and Chemical Engineering, The Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, and Sun Yat-Sen University, Guangzhou 510275, China.
Dalton Transactions (Cambridge, England : 2003)
|August 8, 2007
Summary
Density functional theory (DFT) investigated the hydrolysis of anticancer drug ICR. Calculated hydrolysis barriers and rate constants closely match experimental data, aiding understanding of drug interactions.
Area of Science:
- Computational Chemistry
- Medicinal Chemistry
- Quantum Chemistry
Background:
- The anticancer drug [ImH][trans-RuCl4(Im)2] (ICR) is a ruthenium complex with potential therapeutic applications.
- Understanding the hydrolysis mechanism of ICR is crucial for elucidating its interactions with biological targets.
Purpose of the Study:
- To investigate the hydrolysis process of the anticancer drug ICR using computational methods.
- To calculate hydrolysis barriers and rate constants in aqueous solution and compare them with experimental data.
- To analyze the electronic properties of hydrolysis intermediates and products to understand their reactivity.
Main Methods:
- Density Functional Theory (DFT) was employed to study the hydrolysis mechanism.
- The conductor-like polarizable calculation model (CPCM) was used to account for aqueous solution effects.
- Stationary points on potential energy surfaces were optimized and characterized for hydrolysis steps.
Main Results:
- Computed free energy barriers and rate constants for the first hydrolysis step show excellent agreement with experimental values.
- Analysis of electronic characteristics reveals the order of nucleophilic attack abilities of hydrolysis products.
- Path 1 of the second hydrolysis step is thermodynamically preferred, suggesting dominance of cis-diaqua species.
Conclusions:
- The theoretical calculations accurately predict the hydrolysis behavior of ICR in aqueous solution.
- The study provides detailed energy profiles and structural properties of the hydrolysis process.
- These findings contribute to understanding the reaction mechanism of ICR with biomolecular targets.
