International Journal of Quantum Chemistry最新文献

{"title":"Spectrum-Based Topological Indices and Their QSPR Studies of Nonsteroidal Anti-Inflammatory Drugs","authors":"K. Pattabiraman,&nbsp;P. Danesh","doi":"10.1002/qua.27472","DOIUrl":"https://doi.org/10.1002/qua.27472","url":null,"abstract":"<div>\u0000 \u0000 <p>Spectrum-based topological indices (eigenvalue-based topological indices), a valuable tool for analyzing molecular structure. These topological indices are metrics that reflect the inherent characteristics of chemical substances, were employed in conjunction with quantitative structure-property relationship (QSPR) to investigate nonsteroidal anti-inflammatory drugs (NSAIDs) which are used toalleviate or eliminate pain sensations in affected areas. We have to use mathematica to compute various eigenvalue-based indices and utilized statistical software to identify correlations between these indices and key physical properties of NSAIDs. The analysis revealed that specific indices, including <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mrow>\u0000 <mi>E</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>F</mi>\u0000 <mi>Z</mi>\u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {E}_{FZS} $$</annotation>\u0000 </semantics></math> index, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mrow>\u0000 <mi>ρ</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>F</mi>\u0000 <mi>Z</mi>\u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {rho}_{FZS} $$</annotation>\u0000 </semantics></math> index, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mrow>\u0000 <mi>E</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>I</mi>\u0000 <mi>S</mi>\u0000 <mi>I</mi>\u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {E}_{ISIS} $$</annotation>\u0000 </semantics></math> index, and <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mrow>\u0000 <mi>E</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>A</mi>\u0000 <mi>B</mi>\u0000 <mi>C</mi>\u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$$ {E}_{ABCS} $$</annotation>\u0000 </semantics></math> index exhibited strong associations with properties like complexity and refractivity, boiling point, polarity, and molar weight, respectively.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 18","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of Iron-Catalyzed C—H Alkenylation of Pivalophenone Derivatives With Unsymmetric Internal Alkynes","authors":"Stefano Santoro","doi":"10.1002/qua.27479","DOIUrl":"https://doi.org/10.1002/qua.27479","url":null,"abstract":"<p>The mechanism of an iron-catalyzed C—H alkenylation of pivalophenone derivatives with unsymmetric internal alkynes is investigated in details by means of density functional theory calculations. It is shown that the reaction begins with two consecutive ligand exchanges, followed by a fast and reversible oxidative addition C—H activation step. Next, an alkyne insertion into the Fe—H bond, two isomerization steps, and a reductive elimination afford the final product. The reductive elimination is the turnover-limiting step of the process, and also determines the regiochemical outcome of the reaction. The origin of the regioselectivity is proposed to be the steric repulsion between the bulky trimethylsilyl group and the aromatic fragment in the reductive elimination step leading to the not observed regioisomer.</p>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 18","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qua.27479","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical Prediction on the Reaction of Dimeric Ca Hydride [(BDI)Ca(μ-H)]2 With 1,3-Cyclopentadiene to Produce [(BDI)Ca(μ-C5H5)]2: The Decisive Role of Aromatization","authors":"Nannan Liu,&nbsp;Hongfeng Li","doi":"10.1002/qua.27477","DOIUrl":"https://doi.org/10.1002/qua.27477","url":null,"abstract":"<div>\u0000 \u0000 <p>This study explores the reaction mechanism between [(BDI)Ca(μ-H)]₂ and cyclopentadiene (C₅H₆). By analyzing the reaction pathways, it is found that compared with the traditional Ca<span></span>H/CC insertion reaction of polyenes with [(BDI)Ca(μ-H)]₂, C₅H₆ is more inclined to undergo a Ca<span></span>H/CH₂ dehydrogenation reaction, resulting in more stable cyclopentadienyl complexes. The subsequent reactions also tend to continue with dehydrogenation to form dimeric complexes. The aromatization process of C₅H₆ is a key factor driving this reaction trend. This result provides a new perspective for understanding the catalytic behavior of calcium hydride derivatives and can help in the design and synthesis of new catalysts and functional materials based on such compounds.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neighborhood Degree Based Topological Indices of Nanotube via Direct and NM-Polynomial","authors":"Muhammad Irfan,&nbsp;Farhana Yasmeen,&nbsp;Shanza Aziz,&nbsp;Muzammil Mukhtar","doi":"10.1002/qua.27474","DOIUrl":"https://doi.org/10.1002/qua.27474","url":null,"abstract":"<div>\u0000 \u0000 <p>The analysis of various chemical structures can be done by using topological indices (TI), graph polynomials, and other useful tools that graph theory offers. The mathematical entries called TI are subtracted from the chemical structure. In this article, we investigate the neighborhood degree based topological indices of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>T</mi>\u0000 <mi>U</mi>\u0000 <msub>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mn>4</mn>\u0000 </mrow>\u0000 </msub>\u0000 <msub>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mn>8</mn>\u0000 </mrow>\u0000 </msub>\u0000 <mo>(</mo>\u0000 <mi>R</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$$ TU{C}_4{C}_8(R) $$</annotation>\u0000 </semantics></math> nanotube via direct and NM-polynomial. The indices which we have computed are first, second, third, fourth, fifth NDe indices, third version of Zagreb index, neighborhood second Zagreb index, neighborhood second modified Zagreb index, neighborhood forgotten topological index, neighborhood general Randic index, neighborhood inverse sum index, fourth atom bond connectivity index, fifth geometric arithmetic index, fifth arithmetic geometric index, fifth hyper first and second Zagreb index.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142142360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Resistance Distance and Kirchhoff Index of Cayley Graphs on Generalized Quaternion Groups","authors":"Yan Wang,&nbsp;Shuo Zhu,&nbsp;Kai Yuan","doi":"10.1002/qua.27471","DOIUrl":"https://doi.org/10.1002/qua.27471","url":null,"abstract":"<div>\u0000 \u0000 <p>Based on irreducible representations of generalized quaternion groups, closed-form formulae of Kirchhoff indices and resistance distances between vertex pairs of Cayley graphs on these groups are given.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction to “A Comprehensive Analysis of Electronic Transitions in Naphthalene and Perylene Diimide Derivatives Through Computational Methods”","authors":"","doi":"10.1002/qua.27473","DOIUrl":"https://doi.org/10.1002/qua.27473","url":null,"abstract":"<p>W. Hussain, M. S. Iqbal, H. Li, M. Sulaman, H. Guo, C. Li, Y. Sandali, A. Irfan, and H. S. Ali, “A Comprehensive Analysis of Electronic Transitions in Naphthalene and Perylene Diimide Derivatives Through Computational Methods,” <i>International Journal of Quantum Chemistry</i> 124, no. 1 (2024): e27223, 10.1002/qua.27223.</p><p>During the assembly of Figure 27, the image intended to represent Figure D was incorrectly replaced by a duplicate of Figure E. This resulted in the erroneous presentation of Figure E twice and the omission of the correct Figure D.</p><p>Additionally, a statement from Section 2.2 Computational Detail needs to be changed from: “The DOS data were shown using PyMOlyze 1.1, and the electron densities were calculated using Multiwfn 3.7 [43].” to “The DOS data were shown using PyMOlyze 1.1, and the electron density maps and non-covalent interaction (NCI) plots were generated using Multiwfn 3.7 [43] and visualized using VMD software (Ref. W. Humphrey, A. Dalke, and K. Schulten, “VMD: Visual Molecular Dynamics,” <i>Journal of Molecular Graphics</i> 14, no. 1 (1996): 33–38, 27–38.).”</p><p>We apologize for this error.</p>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qua.27473","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computationally Effective Approach for Studies of Mechanism and Thermodynamics of Heterogeneous Catalytic Processes on Metal Oxides","authors":"Ekaterina G. Ragoyja,&nbsp;Vitaly E. Matulis,&nbsp;Oleg A. Ivashkevich,&nbsp;Dmitry A. Lyakhov,&nbsp;Dominik Michels","doi":"10.1002/qua.27470","DOIUrl":"https://doi.org/10.1002/qua.27470","url":null,"abstract":"<div>\u0000 \u0000 <p>To understand the nature of heterogeneous catalytic processes and improve their efficiency, it is necessary to conduct both experimental and theoretical studies. At the same time, there is no unified approach to obtaining the necessary data using quantum chemistry methods. In this work, problems of the existing calculational approaches are analyzed. The obtained information is used to develop the original three-layer embedded cluster model approach, which is shown to be the most effective. The general algorithm for obtaining such models for various oxides is formulated. The sufficient accuracy of the proposed models in predicting geometric and energy characteristics, vibrational frequencies, activation barriers, and thermodynamic characteristics is verified. The specifics of calculating the thermodynamic characteristics of heterogeneous processes using the proposed cluster models is studied in detail. The developed approach is an effective tool for studying the mechanism of heterogeneous catalytic processes both by itself and in combination with experiment.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermomagnetic Models for the Improved Rosen–Morse Oscillator","authors":"A. D. Ahmed,&nbsp;E. S. Eyube,&nbsp;S. D. Najoji,&nbsp;P. U. Tanko,&nbsp;C. A. Onate,&nbsp;E. Omugbe,&nbsp;B. D. Mohammed,&nbsp;C. R. Makasson,&nbsp;E. H. Mshelia","doi":"10.1002/qua.27463","DOIUrl":"https://doi.org/10.1002/qua.27463","url":null,"abstract":"<div>\u0000 \u0000 <p>This study solves the radial Schrödinger wave equation (RSWE) with the improved Rosen–Morse (IRM) potential constrained by an electromagnetic field. Energy eigenvalues are derived using the parametric Nikiforov–Uvarov method and Pekeris approximation. The internal partition function, isobaric molar heat capacity formula, and magnetization model are then deduced from the equation governing pure vibrational energy states. These analytical models are applied to several pure substances, specifically Br₂ (X ¹Σ_g⁺), BrF (X ¹Σ⁺), ICl (X ¹Σ_g⁺), and P₂ (X ¹Σ_g⁺) molecules. Numerical approximations of the energy eigenvalues for these molecules closely match their exact values. The isobaric molar heat capacity expression yields mean percentage absolute deviations of 1.6585%, 0.9162%, 1.2193%, and 0.7232% when compared against experimental data for Br₂ (X ¹Σ_g⁺), BrF (X ¹Σ⁺), ICl (X ¹Σ_g⁺), and P₂ (X ¹Σ_g⁺), respectively. These results align well with other heat capacity models in existing literature.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational Study of Noncovalent Interactions on Addition of Small Molecule Units With Benzenoid Aromatic Rings","authors":"Rohan Sharma,&nbsp;Chayanika Kashyap,&nbsp;Drishti Baruah,&nbsp;Ilakshi Baruah,&nbsp;Pankaz K. Sharma","doi":"10.1002/qua.27466","DOIUrl":"https://doi.org/10.1002/qua.27466","url":null,"abstract":"<div>\u0000 \u0000 <p>Experimental and theoretical studies over the recent years have shown that noncovalent interactions play a crucial role in diverse chemical and biological processes. Noncovalent interactions have been recognized as significantly contributing towards stabilizing various supramolecular species. We have attempted to interpret computationally the nature of various noncovalent interactions between the aromatic surfaces of 6-phenyl-1,3,5-triazine and biphenyl with polar as well as non-polar molecules such as H₂O, HCl, HF, CO₂, and so forth and adding the inter-aromatic rings π-stacking, using the r²SCAN-3c/DEF2-mTZVPP model chemistry. Energy decomposition analysis with the SAPT method shows that the electrostatics and dispersion components play crucial roles in stabilizing these complexes whereas induction and polarization play minor roles.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 17","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141994258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical Response of a Position-Dependent Optomechanical System With N-Type Four-Level Atoms","authors":"A. Qayyum","doi":"10.1002/qua.27469","DOIUrl":"https://doi.org/10.1002/qua.27469","url":null,"abstract":"<div>\u0000 \u0000 <p>Cavity optomechanics explores the interaction between light and mechanical systems through radiation pressure. This interdisciplinary field merges principles from quantum mechanics and quantum optics provides powerful tools for generating and controlling quantum states. In this research, we theoretically investigated a four-level <i>N</i>-atomic system within the context of optomechanics. The oscillating mirror possesses a mass that varies with position and exhibits a singularity. We analyzed the dynamics using Heisenberg–Langevin equations and calculated steady-state solutions, studied optical response through both analytical and numerical methods. The main focus of this study was optical response within the domain of position-dependent effective mass. Our findings revealed that the output field representing transmission exhibits variations and shift with <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>α</mi>\u0000 </mrow>\u0000 <annotation>$$ alpha $$</annotation>\u0000 </semantics></math>, the nonlinear parameter of the position dependent effective mass. These variations not only impact transmission but also alter the dispersion and phase of the output field.</p>\u0000 </div>","PeriodicalId":182,"journal":{"name":"International Journal of Quantum Chemistry","volume":"124 16","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}