QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I)
The article investigates the influence of intramolecular hydrogen bonding in the maleic acid molecule on the structure and stability of π-acidoaqua complexes of copper(I) using quantum-chemical modeling (DFT/B3LYP). A comparative analysis of geometric and energy parameters between π-acidoaq...
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2025
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-7272025-09-25T13:41:22Z QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) Smirnov, Serhii Yelahinaa, Natalia Osokin, Yevhen π-complexes Cu(I), maleic acid, DFT, QTAIM, dπ-pπ-bonding, pharmaceutical chemistry. The article investigates the influence of intramolecular hydrogen bonding in the maleic acid molecule on the structure and stability of π-acidoaqua complexes of copper(I) using quantum-chemical modeling (DFT/B3LYP). A comparative analysis of geometric and energy parameters between π-acidoaquacomplexes with maleic acid of different structures with and without intramolecular hydrogen bonding was performed. The features of the coordination of Cu+ ions with the unsaturated C=C fragment of maleic acid, as well as the interaction with water molecules in the internal coordination sphere, are considered. It is shown that the presence of an intramolecular hydrogen bond in the acid molecule only partially affects the electronic energy of the system, but is able to stabilize some complexes, in particular [Cu(С4Н3О4)(H2O)2]0 and [Cu(С4Н3О4)(H2O)3]0, compared with the results of modeling without taking into account the intramolecular hydrogen bond. An analysis of the topology of the electron density was carried out, critical points were identified, which indicate the formation of six- and seven-membered rings in structures with an intramolecular hydrogen bond. It is shown that in complexes with intramolecular hydrogen bond for acids deprotonated by the first degree, a slight unfolding of the carboxyl group was observed. And it also significantly affects the distribution of the effective charge, in particular Cu+ ions. Calculations showed that intramolecular hydrogen bonding reduces the electron density that maleic acid transfers to the Cu+ ion, which affects the effective charge of the latter, as well as the dπ-pπ-binding energies. The obtained results complement the data of previous studies and allow a better understanding of the role of intramolecular interactions in the stabilization of π-complexes of Cu(I) with bifunctional ligands. V.I.Vernadsky Institute of General and Inorganic Chemistry 2025-06-25 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/727 10.33609/2708-129X.91.5.2025.21-32 Ukrainian Chemistry Journal; Vol. 91 No. 5 (2025): Ukrainian Chemistry Journal; 21-32 Украинский химический журнал; Том 91 № 5 (2025): Ukrainian Chemistry Journal; 21-32 Український хімічний журнал; Том 91 № 5 (2025): Ukrainian Chemistry Journal; 21-32 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/727/367 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2025-09-25T13:41:22Z |
| collection |
OJS |
| language |
English |
| topic_facet |
π-complexes Cu(I) maleic acid DFT QTAIM dπ-pπ-bonding pharmaceutical chemistry. |
| format |
Article |
| author |
Smirnov, Serhii Yelahinaa, Natalia Osokin, Yevhen |
| spellingShingle |
Smirnov, Serhii Yelahinaa, Natalia Osokin, Yevhen QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) |
| author_facet |
Smirnov, Serhii Yelahinaa, Natalia Osokin, Yevhen |
| author_sort |
Smirnov, Serhii |
| title |
QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) |
| title_short |
QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) |
| title_full |
QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) |
| title_fullStr |
QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) |
| title_full_unstemmed |
QUANTUM CHEMICAL MODELING OF THE EFFECT OF INTRAMOLECULAR HYDROGEN BONDING OF MALEIC ACID ON THE STRUCTURE OF MALEIC π-AQUACOMPLEXES СOPPER(I) |
| title_sort |
quantum chemical modeling of the effect of intramolecular hydrogen bonding of maleic acid on the structure of maleic π-aquacomplexes сopper(i) |
| description |
The article investigates the influence of intramolecular hydrogen bonding in the maleic acid molecule on the structure and stability of π-acidoaqua complexes of copper(I) using quantum-chemical modeling (DFT/B3LYP). A comparative analysis of geometric and energy parameters between π-acidoaquacomplexes with maleic acid of different structures with and without intramolecular hydrogen bonding was performed. The features of the coordination of Cu+ ions with the unsaturated C=C fragment of maleic acid, as well as the interaction with water molecules in the internal coordination sphere, are considered. It is shown that the presence of an intramolecular hydrogen bond in the acid molecule only partially affects the electronic energy of the system, but is able to stabilize some complexes, in particular [Cu(С4Н3О4)(H2O)2]0 and [Cu(С4Н3О4)(H2O)3]0, compared with the results of modeling without taking into account the intramolecular hydrogen bond. An analysis of the topology of the electron density was carried out, critical points were identified, which indicate the formation of six- and seven-membered rings in structures with an intramolecular hydrogen bond. It is shown that in complexes with intramolecular hydrogen bond for acids deprotonated by the first degree, a slight unfolding of the carboxyl group was observed. And it also significantly affects the distribution of the effective charge, in particular Cu+ ions. Calculations showed that intramolecular hydrogen bonding reduces the electron density that maleic acid transfers to the Cu+ ion, which affects the effective charge of the latter, as well as the dπ-pπ-binding energies. The obtained results complement the data of previous studies and allow a better understanding of the role of intramolecular interactions in the stabilization of π-complexes of Cu(I) with bifunctional ligands. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2025 |
| url |
https://ucj.org.ua/index.php/journal/article/view/727 |
| work_keys_str_mv |
AT smirnovserhii quantumchemicalmodelingoftheeffectofintramolecularhydrogenbondingofmaleicacidonthestructureofmaleicpaquacomplexessopperi AT yelahinaanatalia quantumchemicalmodelingoftheeffectofintramolecularhydrogenbondingofmaleicacidonthestructureofmaleicpaquacomplexessopperi AT osokinyevhen quantumchemicalmodelingoftheeffectofintramolecularhydrogenbondingofmaleicacidonthestructureofmaleicpaquacomplexessopperi |
| first_indexed |
2025-09-26T01:42:09Z |
| last_indexed |
2025-09-26T01:42:09Z |
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1849658136841945088 |