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Hydrogen bonds between hydrogen fluoride and aromatic azines: An ab initio study

Identifieur interne : 001049 ( Istex/Corpus ); précédent : 001048; suivant : 001050

Hydrogen bonds between hydrogen fluoride and aromatic azines: An ab initio study

Auteurs : Victor H. Rusu ; Mozart N. Ramos ; João Bosco P. Da Silva

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RBID : ISTEX:76CFC3C61BCA69059FA0465F5D7E2356883522CF

English descriptors

Abstract

MP2/6‐31++G(d,p) ab initio molecular orbital calculations have been employed to characterize hydrogen‐bonded complexes between hydrogen fluoride as proton donor and aromatic azines (pyridine, pyrimidine, pyridazine, pyrazine, 1,3,5‐triazine, and 1,2,4‐triazine). Our calculations have shown that the H‐bond strength in these complexes depends on both the number of nitrogen atoms as well as the position of these atoms in aromatic ring. The binding energies of azines‐HF with or without BSSE and ZPE corrections decrease with the increasing number of nitrogen atoms in the ring. For example, its ΔEBSSE,ZPE value is 40.9 kJ · mol−1 in pyridine‐HF, whereas its corresponding values in pyrazine‐HF and 1,3,5‐triazine‐HF are 34.0 kJ · mol−1 and 26.6 kJ · mol−1, respectively. With respect to position of the nitrogen atom in the aromatic ring, the more pronounced effect is verified when it is at meta‐position relative to the pyridine ring. There is a high linear correlation between the H‐bond strength in these complexes and the intermolecular charge transfer using corrected Mulliken charges obtained from the charge‐charge flux‐overlap (CCFO) modified model for infrared intensities. Finally, our MP2/6‐31++G(d,p) calculations have revealed that stronger hydrogen bonds are associated with smaller H‐bond length values, larger intermolecular charge transfers and greater HF downward stretching frequency displacements. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006

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DOI: 10.1002/qua.21084

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ISTEX:76CFC3C61BCA69059FA0465F5D7E2356883522CF

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<div type="abstract" xml:lang="en">MP2/6‐31++G(d,p) ab initio molecular orbital calculations have been employed to characterize hydrogen‐bonded complexes between hydrogen fluoride as proton donor and aromatic azines (pyridine, pyrimidine, pyridazine, pyrazine, 1,3,5‐triazine, and 1,2,4‐triazine). Our calculations have shown that the H‐bond strength in these complexes depends on both the number of nitrogen atoms as well as the position of these atoms in aromatic ring. The binding energies of azines‐HF with or without BSSE and ZPE corrections decrease with the increasing number of nitrogen atoms in the ring. For example, its ΔEBSSE,ZPE value is 40.9 kJ · mol−1 in pyridine‐HF, whereas its corresponding values in pyrazine‐HF and 1,3,5‐triazine‐HF are 34.0 kJ · mol−1 and 26.6 kJ · mol−1, respectively. With respect to position of the nitrogen atom in the aromatic ring, the more pronounced effect is verified when it is at meta‐position relative to the pyridine ring. There is a high linear correlation between the H‐bond strength in these complexes and the intermolecular charge transfer using corrected Mulliken charges obtained from the charge‐charge flux‐overlap (CCFO) modified model for infrared intensities. Finally, our MP2/6‐31++G(d,p) calculations have revealed that stronger hydrogen bonds are associated with smaller H‐bond length values, larger intermolecular charge transfers and greater HF downward stretching frequency displacements. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006</div>
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value is 40.9 kJ · mol
<sup>−1</sup>
in pyridine‐HF, whereas its corresponding values in pyrazine‐HF and 1,3,5‐triazine‐HF are 34.0 kJ · mol
<sup>−1</sup>
and 26.6 kJ · mol
<sup>−1</sup>
, respectively. With respect to position of the nitrogen atom in the aromatic ring, the more pronounced effect is verified when it is at
<i>meta</i>
‐position relative to the pyridine ring. There is a high linear correlation between the H‐bond strength in these complexes and the intermolecular charge transfer using corrected Mulliken charges obtained from the charge‐charge flux‐overlap (CCFO) modified model for infrared intensities. Finally, our MP2/6‐31++G(
<i>d,p</i>
) calculations have revealed that stronger hydrogen bonds are associated with smaller H‐bond length values, larger intermolecular charge transfers and greater HF downward stretching frequency displacements. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006</p>
</abstract>
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<title>Hydrogen bonds between hydrogen fluoride and aromatic azines: An ab initio study</title>
</titleInfo>
<titleInfo type="abbreviated" lang="en">
<title>H Bonds Between HF and Aromatic Azines: Ab Initio Study</title>
</titleInfo>
<titleInfo type="alternative" contentType="CDATA" lang="en">
<title>Hydrogen bonds between hydrogen fluoride and aromatic azines: An ab initio study</title>
</titleInfo>
<name type="personal">
<namePart type="given">Victor H.</namePart>
<namePart type="family">Rusu</namePart>
<affiliation>Departamento de Química Fundamental, Universidade Federal de Pernambuco (UFPE), 50740‐540, Recife (PE), Brazil</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Mozart N.</namePart>
<namePart type="family">Ramos</namePart>
<affiliation>Departamento de Química Fundamental, Universidade Federal de Pernambuco (UFPE), 50740‐540, Recife (PE), Brazil</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">João Bosco P.</namePart>
<namePart type="family">Da Silva</namePart>
<affiliation>Departamento de Química Fundamental, Universidade Federal de Pernambuco (UFPE), 50740‐540, Recife (PE), Brazil</affiliation>
<description>Correspondence: Departamento de Química Fundamental, Universidade Federal de Pernambuco (UFPE), 50740‐540, Recife (PE), Brazil</description>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<typeOfResource>text</typeOfResource>
<genre type="article">article</genre>
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<publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher>
<place>
<placeTerm type="text">Hoboken</placeTerm>
</place>
<dateIssued encoding="w3cdtf">2006</dateIssued>
<dateCaptured encoding="w3cdtf">2006-04-03</dateCaptured>
<dateValid encoding="w3cdtf">2006-04-06</dateValid>
<copyrightDate encoding="w3cdtf">2006</copyrightDate>
</originInfo>
<language>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
</language>
<physicalDescription>
<internetMediaType>text/html</internetMediaType>
<extent unit="figures">5</extent>
<extent unit="tables">3</extent>
<extent unit="references">29</extent>
<extent unit="words">3690</extent>
</physicalDescription>
<abstract lang="en">MP2/6‐31++G(d,p) ab initio molecular orbital calculations have been employed to characterize hydrogen‐bonded complexes between hydrogen fluoride as proton donor and aromatic azines (pyridine, pyrimidine, pyridazine, pyrazine, 1,3,5‐triazine, and 1,2,4‐triazine). Our calculations have shown that the H‐bond strength in these complexes depends on both the number of nitrogen atoms as well as the position of these atoms in aromatic ring. The binding energies of azines‐HF with or without BSSE and ZPE corrections decrease with the increasing number of nitrogen atoms in the ring. For example, its ΔEBSSE,ZPE value is 40.9 kJ · mol−1 in pyridine‐HF, whereas its corresponding values in pyrazine‐HF and 1,3,5‐triazine‐HF are 34.0 kJ · mol−1 and 26.6 kJ · mol−1, respectively. With respect to position of the nitrogen atom in the aromatic ring, the more pronounced effect is verified when it is at meta‐position relative to the pyridine ring. There is a high linear correlation between the H‐bond strength in these complexes and the intermolecular charge transfer using corrected Mulliken charges obtained from the charge‐charge flux‐overlap (CCFO) modified model for infrared intensities. Finally, our MP2/6‐31++G(d,p) calculations have revealed that stronger hydrogen bonds are associated with smaller H‐bond length values, larger intermolecular charge transfers and greater HF downward stretching frequency displacements. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006</abstract>
<note type="funding">CNPq</note>
<note type="funding">CAPES‐PADCT</note>
<note type="funding">FINEP (Brazil)</note>
<subject lang="en">
<genre>Keywords</genre>
<topic>hydrogen bonds</topic>
<topic>hydrogen fluoride</topic>
<topic>heterocyclic rings</topic>
<topic>ab initio calculations</topic>
<topic>charge transfer</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>International Journal of Quantum Chemistry</title>
</titleInfo>
<titleInfo type="abbreviated">
<title>Int. J. Quantum Chem.</title>
</titleInfo>
<name type="personal">
<namePart type="given">Sylvio</namePart>
<namePart type="family">Canuto</namePart>
</name>
<name type="personal">
<namePart type="given">Alfredo</namePart>
<namePart type="family">Arnóbio Da Gama</namePart>
</name>
<identifier type="ISSN">0020-7608</identifier>
<identifier type="eISSN">1097-461X</identifier>
<identifier type="DOI">10.1002/(ISSN)1097-461X</identifier>
<identifier type="PublisherID">QUA</identifier>
<part>
<date>2006</date>
<detail type="title">
<title>Proceedings of the XIII Brazilian Symposium of Theoretical Chemistry</title>
</detail>
<detail type="volume">
<caption>vol.</caption>
<number>106</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>13</number>
</detail>
<extent unit="pages">
<start>2811</start>
<end>2817</end>
<total>7</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">76CFC3C61BCA69059FA0465F5D7E2356883522CF</identifier>
<identifier type="DOI">10.1002/qua.21084</identifier>
<identifier type="ArticleID">QUA21084</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 2006 Wiley Periodicals, Inc.</accessCondition>
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<recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin>
<recordContentSource>WILEY</recordContentSource>
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