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Parimala devi D, Praveena G, Jeba Beula R, Abiram A. INVESTIGATION OF DIHYDROGEN BOND INTERACTION BETWEEN CYCLOALKENES AND ALKALI METAL HYDRIDES: A DFT APPROACH. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622040011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Estimation of resonance assisted hydrogen bond (RAHB) energies using properties of ring critical points in some dihydrogen-bonded complexes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Intermolecular C-H∙∙∙H-M dihydrogen bonds in five-membered heterocyclic complexes: a DFT and ab-initio study. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02680-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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4
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Duraisamy PD, Gopalan P, Angamuthu A. Molecular structure, FT-IR and NMR analyses of dihydrogen-bonded B3N3H6···HM complexes: a DFT and MP2 approach. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-01011-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Oliveira BG, Zabardasti A, Goudarziafshar H, Salehnassaj M. The electronic mechanism ruling the dihydrogen bonds and halogen bonds in weakly bound systems of H3SiH···HOX and H3SiH···XOH (X = F, Cl, and Br). J Mol Model 2015; 21:77. [PMID: 25754136 DOI: 10.1007/s00894-015-2616-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 02/08/2015] [Indexed: 11/24/2022]
Affiliation(s)
- Boaz G Oliveira
- Instituto de Ciências Ambientais e Desenvolvimento Sustentável, Universidade Federal da Bahia, 47801-100, Barreiras, Brazil,
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6
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Theoretical studies on the dihydrogen bonding between shortchain hydrocarbon and magnesium hydride. Chem Res Chin Univ 2014. [DOI: 10.1007/s40242-014-4051-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Abstract
Ab initio calculations were used to analyze interactions of with 1–4 molecules of NH3at the MP2/6-311++G(d,p) and the B3LYP/6-311++G(d,p) computational levels. In addition to H3B–H⋯H–NH2dihydrogen bond, the H2N–H⋯NH3hydrogen bonds were also predicted in clusters. Negative cooperativity in clusters constructed from mixed H3B–H⋯H–NH2dihydrogen and H2N–H⋯NH3hydrogen bonds are more remarkable. The negative cooperativity increases with size and number of hydrogen bonds in cluster. The B–H stretching frequencies show blue shifts with respect to cluster formation. Greater blue shift in stretching frequencies was predicted for B–H bonds which did not contribute to dihydrogen bonding with NH3molecules. The structures were analyzed with the atoms in molecules (AIM) methodology.
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8
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Oliveira BGD. Structure, energy, vibrational spectrum, and Bader's analysis of π⋯H hydrogen bonds and H−δ⋯H+δdihydrogen bonds. Phys Chem Chem Phys 2013; 15:37-79. [DOI: 10.1039/c2cp41749a] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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9
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Li QZ, Li R, Liu XF, Li WZ, Cheng JB. Pnicogen–Hydride Interaction between FH2X (X = P and As) and HM (M = ZnH, BeH, MgH, Li, and Na). J Phys Chem A 2012; 116:2547-53. [DOI: 10.1021/jp211435b] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qing-Zhong Li
- The Laboratory of Theoretical and
Computational Chemistry,
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People’s Republic
of China
| | - Ran Li
- The Laboratory of Theoretical and
Computational Chemistry,
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People’s Republic
of China
| | - Xiao-Feng Liu
- The Laboratory of Theoretical and
Computational Chemistry,
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People’s Republic
of China
| | - Wen-Zuo Li
- The Laboratory of Theoretical and
Computational Chemistry,
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People’s Republic
of China
| | - Jian-Bo Cheng
- The Laboratory of Theoretical and
Computational Chemistry,
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, People’s Republic
of China
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10
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Sandhya KS, Suresh CH. DFT study on the mechanism of water-assisted dihydrogen elimination in group 6 octahedral metal hydride complexes. Dalton Trans 2012; 41:11018-25. [DOI: 10.1039/c2dt31230a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Sandhya KS, Suresh CH. Water Splitting Promoted by a Ruthenium(II) PNN Complex: An Alternate Pathway through a Dihydrogen Complex for Hydrogen Production. Organometallics 2011. [DOI: 10.1021/om200046u] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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12
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Feng L, Bai FQ, Wu Y, Zhang HX. Dihydrogen bond in C2H4−nCln ··· NaH (n = 0, 1, 2, 3) complexes: ab initio, AIM and NBO studies. Mol Phys 2011. [DOI: 10.1080/00268976.2010.546374] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Zabardasti A, Zare N, Arabpour M. Theoretical study of dihydrogen bonded clusters of water with tetrahydroborate. Struct Chem 2011. [DOI: 10.1007/s11224-011-9747-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Sedlák R, Fanfrlík J, Hnyk D, Hobza P, Lepšík M. Interactions of Boranes and Carboranes with Aromatic Systems: CCSD(T) Complete Basis Set Calculations and DFT-SAPT Analysis of Energy Components. J Phys Chem A 2010; 114:11304-11. [DOI: 10.1021/jp104411x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Róbert Sedlák
- Center for Biomolecules and Complex Systems and Institute of Organic Chemistry and Biochemistry, 16610, Prague 6, Institute of Inorganic Chemistry, 250 68, Rez near Prague, Academy of Sciences of the Czech Republic, and Department of Physical Chemistry, Palacky University, 771 46, Olomouc, Czech Republic
| | - Jindřich Fanfrlík
- Center for Biomolecules and Complex Systems and Institute of Organic Chemistry and Biochemistry, 16610, Prague 6, Institute of Inorganic Chemistry, 250 68, Rez near Prague, Academy of Sciences of the Czech Republic, and Department of Physical Chemistry, Palacky University, 771 46, Olomouc, Czech Republic
| | - Drahomír Hnyk
- Center for Biomolecules and Complex Systems and Institute of Organic Chemistry and Biochemistry, 16610, Prague 6, Institute of Inorganic Chemistry, 250 68, Rez near Prague, Academy of Sciences of the Czech Republic, and Department of Physical Chemistry, Palacky University, 771 46, Olomouc, Czech Republic
| | - Pavel Hobza
- Center for Biomolecules and Complex Systems and Institute of Organic Chemistry and Biochemistry, 16610, Prague 6, Institute of Inorganic Chemistry, 250 68, Rez near Prague, Academy of Sciences of the Czech Republic, and Department of Physical Chemistry, Palacky University, 771 46, Olomouc, Czech Republic
| | - Martin Lepšík
- Center for Biomolecules and Complex Systems and Institute of Organic Chemistry and Biochemistry, 16610, Prague 6, Institute of Inorganic Chemistry, 250 68, Rez near Prague, Academy of Sciences of the Czech Republic, and Department of Physical Chemistry, Palacky University, 771 46, Olomouc, Czech Republic
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15
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Cheng J, Li R, Li Q, Jing B, Liu Z, Li W, Gong B, Sun J. Prominent Effect of Alkali Metals in Halogen-Bonded Complex of MCCBr−NCM′ (M and M′ = H, Li, Na, F, NH2, and CH3). J Phys Chem A 2010; 114:10320-5. [DOI: 10.1021/jp105891c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianbo Cheng
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Ran Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Bo Jing
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Zhenbo Liu
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Wenzuo Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Baoan Gong
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
| | - Jiazhong Sun
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, People’s Republic of China
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16
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Zabardasti A, Kakanejadi A, Moosavi S, Bigleri Z, Solimannejad M. Anticooperativity in dihydrogen bonded clusters of ammonia and. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2010.01.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Li Q, Yuan H, Jing B, Liu Z, Li W, Cheng J, Gong B, Sun J. Theoretical study of halogen–hydride halogen bonds in F3CL ··· HM (L=Cl, Br; M=Li, BeH, MgH) complexes. Mol Phys 2010. [DOI: 10.1080/00268971003630703] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Li Q, Yuan H, Jing B, Liu Z, Li W, Cheng J, Gong B, Sun J. Theoretical study of halogen bonding between FnH3−nCBr (n=0, 1, 2, 3) and HMgH. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2009.12.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Zierkiewicz W, Michalska D, Zeegers-Huyskens T. Theoretical investigation of the conformation, acidity, basicity and hydrogen bonding ability of halogenated ethers. Phys Chem Chem Phys 2010; 12:13681-91. [PMID: 20856955 DOI: 10.1039/c0cp00192a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Wiktor Zierkiewicz
- Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
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20
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Yin B, Huang Y, Wang G, Wang Y. Combined DFT and NBO study on the electronic basis of Si···N-β-donor bond. J Mol Model 2009; 16:437-46. [DOI: 10.1007/s00894-009-0560-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Accepted: 07/01/2009] [Indexed: 11/28/2022]
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21
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Multiple proton donors on BeH2···2HCl trimolecular dihydrogen-bonded complex: some theoretical insights. Struct Chem 2008. [DOI: 10.1007/s11224-008-9344-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Korona T. First-order exchange energy of intermolecular interactions from coupled cluster density matrices and their cumulants. J Chem Phys 2008; 128:224104. [DOI: 10.1063/1.2933312] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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23
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Yin B, Wang G, Sa N, Huang Y. Bonding analysis and stability on alternant B16N16 cage and its dimers. J Mol Model 2008; 14:789-95. [PMID: 18493803 DOI: 10.1007/s00894-008-0303-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2007] [Accepted: 03/12/2008] [Indexed: 11/29/2022]
Abstract
Bonding analysis is performed on alternant B(16)N(16) cage based on a combined study of DFT with NBO method. The main feature of such analysis is the separation of bonding structure into two components: sigma skeleton and pi bond system. Each component is further decomposed into contributions from various NBOs, thus we obtain the details of bonding interactions of every BN unit. Based on these results, relative stability of four covalent dimers of B(16)N(16) is predicted and this prediction is verified by DFT calculations. So the possibility of forecasting properties of oligomers just from analysis on monomer is highlighted in this way.
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Affiliation(s)
- Bing Yin
- College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic China
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24
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Krapp A, Frenking G, Uggerud E. Nonpolar Dihydrogen Bonds-On a Gliding Scale from Weak Dihydrogen Interaction to Covalent HH in Symmetric Radical Cations [HnE-H-H-EHn]+. Chemistry 2008; 14:4028-38. [DOI: 10.1002/chem.200701613] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Fanfrlík J, Lepsík M, Horinek D, Havlas Z, Hobza P. Interaction of Carboranes with Biomolecules: Formation of Dihydrogen Bonds. Chemphyschem 2006; 7:1100-5. [PMID: 16671116 DOI: 10.1002/cphc.200500648] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Noncovalent interactions of the polyhedral carborane 1-carba-closo-dodecaborane (CB(11)H(12))(-) with building blocks of biomolecules, modelled by glycine (GLY), serine (SER), phenylalanine (PHE), glutamic acid (GLU), lysine (LYS) and arginine (ARG), were investigated in vacuo by molecular dynamics simulations with the UFF empirical potential. Selected structures were further studied by accurate ab initio quantum chemical procedures. Interactions with a peptide bond (GLY-SER dipeptide) and a nucleic acid building block (guanine) were also considered. The RESP and NPA charges of carboranes and small model systems are compared and their use is discussed. The dominant interaction between carboranes and biomolecules is the formation of unconventional proton-hydride hydrogen bonds (dihydrogen bonds) characterized by a short distance between hydrogen atoms (as close as 1.8 A) and an average strength in the range of 4.2-5.8 kcal mol(-1). The total stabilization energy of complexes investigated is rather large, and the largest value (approximately 15 kcal mol(-1)) was found for the carborane complexes with ARG and the GLY-SER dipeptide. These interactions are ubiquitous under geometrical constraints influencing the strength of the interaction. The carborane forms dihydrogen bonds with biomolecules preferably with the hydrogen atoms of its lower hemisphere (i.e. the part of the cage opposite to the carbon atom). These two geometrical factors can be used to explain the specificity of inhibition of HIV protease by carboranes.
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Affiliation(s)
- Jindrich Fanfrlík
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic and Center for Biomolecules and Complex Molecular Systems, 166 10 Prague 6, Czech Republic
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Solimannejad M, Alkorta I. Theoretical study of dihydrogen bonds in HnMH⋯HArF and HnMH⋯HKrF complexes (n=1–3; M=Be, Al, Ga, Si, Ge). Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.11.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Solimannejad M, Amlashi LM, Alkorta I, Elguero J. XeH2 as a proton-accepting molecule for dihydrogen bonded systems: A theoretical study. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.02.070] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Cybulski H, Tymińska E, Sadlej J. The Properties of Weak and Strong Dihydrogen-Bonded DH⋅⋅⋅HA Complexes. Chemphyschem 2006; 7:629-39. [PMID: 16477668 DOI: 10.1002/cphc.200500462] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The properties of six dihydrogen-bonded (DHB) dimers with the BeH2 molecule as a proton acceptor were calculated by MP2, CCSD(T) and B3LYP methods. The structural, energetic and spectroscopic parameters are presented and analyzed in terms of their possible correlation with the interaction energy and the intermolecular H...H separation. The symmetry-adapted perturbation theory (SAPT) calculations were performed to gain more insight into the nature of the H...H interactions. The studied complexes are divided into three groups based on the calculated intermolecular distances and the interaction energies which range from approximately -1 to -42 kJ mol(-1). The analysis of the interaction energy components indicates that, in contrast to conventional hydrogen bonds, the induction energy is the most important term in the BeH2NH4+ complex. On the other hand, there is no sharp boundary between the DHB complexes classified as hydrogen bonded and van der Waals systems. The complexation-induced changes in vibrational frequencies and in proton shielding constants show a relationship with the interaction energy. The values of the 2hJXH and 3hJBeX coupling constants correlate well with the interaction energy and with the intermolecular distance.
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Affiliation(s)
- Hubert Cybulski
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
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Hobza P, Zahradník R, Müller-Dethlefs K. The World of Non-Covalent Interactions: 2006. ACTA ACUST UNITED AC 2006. [DOI: 10.1135/cccc20060443] [Citation(s) in RCA: 166] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The review focusses on the fundamental importance of non-covalent interactions in nature by illustrating specific examples from chemistry, physics and the biosciences. Laser spectroscopic methods and both ab initio and molecular modelling procedures used for the study of non-covalent interactions in molecular clusters are briefly outlined. The role of structure and geometry, stabilization energy, potential and free energy surfaces for molecular clusters is extensively discussed in the light of the most advanced ab initio computational results for the CCSD(T) method, extrapolated to the CBS limit. The most important types of non-covalent complexes are classified and several small and medium size non-covalent systems, including H-bonded and improper H-bonded complexes, nucleic acid base pairs, and peptides and proteins are discussed with some detail. Finally, we evaluate the interpretation of experimental results in comparison with state of the art theoretical models: this is illustrated for phenol...Ar, the benzene dimer and nucleic acid base pairs. A review with 270 references.
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Mó O, Yáñez M, Del Bene JE, Alkorta I, Elguero J. Cooperativity and Proton Transfer in Hydrogen-Bonded Triads. Chemphyschem 2005; 6:1411-8. [PMID: 15942970 DOI: 10.1002/cphc.200500089] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Ab initio MP2/6-311+G(3df,2pd) and MP2/aug-cc-pVTZ calculations have been carried out to investigate the structures and properties of AHXHYH(3) (A=F, Cl; X=F, Cl; Y=N, P) hydrogen-bonded complexes. Significant cooperative effects are observed in the XHYH3 dyads in the triads due to the presence of the polar near-neighbor AH. These effects are greater when the polar partner is HF, which is a better proton donor than HCl. Structural changes, red shifts of proton-donor stretching frequencies, nonadditive interaction energies, and electron density redistributions unambiguously demonstrate that the X--HY hydrogen bond (HB) is stronger in the triads than in the corresponding dyads, while the X--H bond of the proton donor becomes weaker. Even more pronounced cooperative effects are observed in the AHXH dyads due to the presence of the YH3 partner. These effects are weaker in complexes having PH3 rather than NH3 as the proton acceptor, since NH3 is a stronger base. Cooperativity also enhances the proton-donating ability of the YH3 moiety, with the result that all complexes except FHFHPH3 are cyclic. Cooperativity, together with the ease of breaking the Cl--H bond in ClHClHNH3 and FHClHNH3, leads to proton transfer (PT), so that these two complexes are better described as approaching hydrogen-bonded ClHCl- x +HNH3 and FHCl- x +HNH3 ion pairs.
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Affiliation(s)
- Otilia Mó
- Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
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