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Lopes S, Nikitin T, Fausto R. Photochemical Study and Vibrational Spectra of Propiolamide Isolated in Low-Temperature Ar, Xe, and N2 Matrices. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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2
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Bernhardt B, Ruth M, Eckhardt AK, Schreiner PR. Ethynylhydroxycarbene (H-C≡C-C̈-OH). J Am Chem Soc 2021; 143:3741-3746. [PMID: 33667077 DOI: 10.1021/jacs.1c00897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The species on the C3H2O potential energy surface have long been known to play a vital role in extraterrestrial chemistry. Here we report on the hitherto uncharacterized isomer ethynylhydroxycarbene (H-C≡C-C̈-OH, 1) generated by high-vacuum flash pyrolysis of ethynylglyoxylic acid ethyl ester and trapped in solid argon matrices at 3 and 20 K. Upon irradiation at 436 nm trans-1 rearranges to its higher lying cis-conformer. Prolonged irradiation leads to the formation of propynal. When the matrix is kept in the dark, 1 reacts within a half-life of ca. 70 h to propynal in a conformer-specific [1,2]H-tunneling process. Our results are fully consistent with computations at the CCSD(T)/cc-pVTZ and the B3LYP/def2-QZVPP levels of theory.
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Affiliation(s)
- Bastian Bernhardt
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Marcel Ruth
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - André K Eckhardt
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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3
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Lopes S, Nikitin T, Fausto R. Structural, spectroscopic, and photochemical study of ethyl propiolate isolated in cryogenic argon and nitrogen matrices. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 241:118670. [PMID: 32679483 DOI: 10.1016/j.saa.2020.118670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/25/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
Ethyl propiolate (HC ≡ CCOOCH2CH3, EP) was studied experimentally by infrared spectroscopy in argon and nitrogen cryomatrices (15 K) and by quantum chemical calculations (at the DFT(B3LYP) and MP2 levels of theory). Calculations predict the existence of four conformers: two low-energy conformers (I and II) possessing the carboxylic moiety in the cis configuration (O=C-O-C dihedral equal to ~0°) and two higher-energy trans forms (O=C-O-C dihedral equal to ~180°; III and IV). The conformation of the ethyl ester group within each pair of conformers is either anti (C-O-C-C equal to 180°; in conformers I and III) or gauche (C-O-C-C equal to ±86.6° in II, and ± 92.5° in IV). The two low-energy cis conformers (I and II) were predicted to differ in energy by less than 2.5 kJ mol-1 and were shown to be present in the studied cryogenic matrices. Characteristic bands for each one of these conformers were identified in the infrared spectra of the matrix-isolated compound and assigned taking into account the results of normal coordinate analysis, which used the geometries and harmonic force constants obtained in the DFT calculations. The two trans conformers (III and IV) were estimated to be 17.5 kJ mol-1 higher in energy than the conformational ground state (form I) and were not observed experimentally. The unimolecular photochemistry of matrix-isolated EP (in N2 matrix) was also investigated. In situ irradiation with UV light (λ > 235 nm) leads mainly to decarbonylation of the compound, with generation of ethoxyethyne, which in a subsequent photoreaction generates ketene (plus ethene).
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Affiliation(s)
- S Lopes
- University of Coimbra, CQC, Department of Chemistry, 3004-535 Coimbra, Portugal.
| | - T Nikitin
- University of Coimbra, CQC, Department of Chemistry, 3004-535 Coimbra, Portugal; University of Coimbra, CFisUC, Department of Physics, 3004-516 Coimbra, Portugal
| | - Rui Fausto
- University of Coimbra, CQC, Department of Chemistry, 3004-535 Coimbra, Portugal.
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4
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Saini J, Dubey P, Verma K, Karir G, Viswanathan KS. Intermolecular Complexes and Molecular Conformations Directed by Hydrogen Bonds: Matrix Isolation and Ab Initio Studies. J Indian Inst Sci 2019. [DOI: 10.1007/s41745-019-00152-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Custer T, Szczepaniak U, Gronowski M, Piétri N, Couturier-Tamburelli I, Guillemin JC, Turowski M, Kołos R. Isomerization of cyanopropyne in solid argon. Phys Chem Chem Phys 2019; 21:13668-13678. [PMID: 31190036 DOI: 10.1039/c8cp06739b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyanopropyne, CH3-C[triple bond, length as m-dash]C-CN, is a simple molecule whose photochemistry is still unexplored. Here we investigate the UV photolysis of this astrophysically significant nitrile trapped in solid argon. The FTIR study was assisted with 15N-isotopic substitution data and with DFT-level computations including the analyses of ground- and excited-state potential energy surfaces. Cyanopropyne was found to decay mainly via a two-step isomerization process. Infrared absorption spectra evolved to show signals from allenyl cyanide, CH2[double bond, length as m-dash]C[double bond, length as m-dash]CH-CN, which then further convert into propargyl cyanide, H-C[triple bond, length as m-dash]C-CH2-CN. Some evidence for the presence of allenyl isocyanide, propargyl isocyanide, 3-cyanocyclopropene, and 1,2,3-butatrien-1-imine under particular experimental conditions was also observed. Although cyano/isocyano interconversion has been observed during photolysis of other closely related species in solid argon matrices, including H-C[triple bond, length as m-dash]C-CN, no evidence could be found for production of 1-isocyano-1-propyne, CH3-C[triple bond, length as m-dash]C-NC for these experiments.
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Affiliation(s)
- Thomas Custer
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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Behera B, Das PK. Blue-Shifted Hydrogen Bonding in the Gas Phase CH/D3CN···HCCl3 Complexes. J Phys Chem A 2019; 123:1830-1839. [DOI: 10.1021/acs.jpca.8b12200] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- B. Behera
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Puspendu K. Das
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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Lopes S, Nikitin T, Fausto R. Propiolic Acid in Solid Nitrogen: NIR- and UV-Induced cis → trans Isomerization and Matrix-Site-Dependent trans → cis Tunneling. J Phys Chem A 2019; 123:1581-1593. [DOI: 10.1021/acs.jpca.8b11319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Susy Lopes
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Timur Nikitin
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Rui Fausto
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
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8
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Saini J, Viswanathan KS. From the propargyl alcohol–water complex to the propargyl alcohol dimer: where does the propargyl alcohol–methanol complex fit in? NEW J CHEM 2019. [DOI: 10.1039/c8nj06051g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A correlation was recognized between the structures of PA–H2O, PA–MeOH and PA dimer complexes that could help predict the structures of larger systems in a systematic way.
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Affiliation(s)
- Jyoti Saini
- Department of Chemical Sciences
- Indian Institute of Science Education and Research
- Mohali
- India
| | - K. S. Viswanathan
- Department of Chemical Sciences
- Indian Institute of Science Education and Research
- Mohali
- India
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Behera B, Das PK. Blue- and Red-Shifting Hydrogen Bonding: A Gas Phase FTIR and Ab Initio Study of RR'CO···DCCl 3 and RR'S···DCCl 3 Complexes. J Phys Chem A 2018; 122:4481-4489. [PMID: 29683668 DOI: 10.1021/acs.jpca.7b11962] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Blue-shifting H-bonded (C-D···O) complexes between CDCl3 and CH3HCO, (CH3)2CO, and C2H5(CH3)CO, and red-shifting H-bonded (C-D···S) complexes between CDCl3 with (CH3)2S and (C2H5)2S have been identified by Fourier transform infrared spectroscopy in the gas phase at room temperature. With increasing partial pressure of the components, a new band appears in the C-D stretching region of the vibrational spectra. The intensity of this band decreases with an increase in temperature at constant pressure, which provides the basis for identification of the H-bonded bands in the spectrum. The C-D stretching frequency of CDCl3 is blue-shifted by +7.1, +4, and +3.2 cm-1 upon complexation with CH3HCO, (CH3)2CO, and C2H5(CH3)CO, respectively, and red-shifted by -14 and -19.2 cm-1 upon complexation with (CH3)2S and (C2H5)2S, respectively. By using quantum chemical calculations at the MP2/6-311++G** level, we predict the geometry, electronic structural parameters, binding energy, and spectral shift of H-bonded complexes between CDCl3 and two series of compounds named RCOR' (H2CO, CH3HCO, (CH3)2CO, and C2H5(CH3)CO) and RSR' (H2S, CH3HS, (CH3)2S, and (C2H5)2S) series. The calculated and observed spectral shifts follow the same trends. With an increase in basicity of the H-bond acceptor, the C-D bond length increases, force constant decreases, and the frequency shifts to the red from the blue. The potential energy scans of the above complexes are done, which show that electrostatic attraction between electropositive D and electron-rich O/S causes bond elongation and red shift, and the electronic and nuclear repulsions lead to bond contraction and blue shifts. The dominance of the two opposing forces at the equilibrium geometry of the complex determines the nature of the shift, which changes both in magnitude and in direction with the basicity of the hydrogen-bond acceptor.
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Affiliation(s)
- B Behera
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Puspendu K Das
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
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10
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Banerjee P, Chakraborty T. Weak hydrogen bonds: insights from vibrational spectroscopic studies. INT REV PHYS CHEM 2018. [DOI: 10.1080/0144235x.2018.1419731] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Pujarini Banerjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
| | - Tapas Chakraborty
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
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11
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Oswald S, Meyer E, Suhm MA. Dinitrogen as a Sensor for Metastable Carboxylic Acid Dimers and a Weak Hydrogen Bond Benchmarking Tool. J Phys Chem A 2018. [DOI: 10.1021/acs.jpca.8b00334] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sönke Oswald
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstraße 6, 37077 Göttingen, Germany
| | - Enno Meyer
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstraße 6, 37077 Göttingen, Germany
| | - Martin A. Suhm
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstraße 6, 37077 Göttingen, Germany
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12
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Complexes of dichlorosilylene with allyl chloride and allyl bromide: matrix IR spectroscopy and quantum chemical studies. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2089-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Verma K, Viswanathan K, Majumder M, Sathyamurthy N. How different is the borazine–acetylene dimer from the benzene–acetylene dimer? A matrix isolation infrared and ab initio quantum chemical study. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1284357] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kanupriya Verma
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar, India
| | - K.S. Viswanathan
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar, India
| | - Moumita Majumder
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India
| | - N. Sathyamurthy
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar, India
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India
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14
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Zhao H, Tang S, Zhang Q, Du L. Weak hydrogen bonding competition between O–H⋯π and O–H⋯Cl. RSC Adv 2017. [DOI: 10.1039/c7ra00901a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The weak hydrogen bonding competition between O–H⋯π and O–H⋯Cl has been studied using FTIR spectroscopy and theoretical calculations.
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Affiliation(s)
- Hailiang Zhao
- Environment Research Institute
- Shandong University
- China
| | - Shanshan Tang
- Environment Research Institute
- Shandong University
- China
| | - Qun Zhang
- Environment Research Institute
- Shandong University
- China
| | - Lin Du
- Environment Research Institute
- Shandong University
- China
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15
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KARIR GINNY, FATIMA MARIYAM, VISWANATHAN KS. The elusive ≡C-H⋯O complex in the hydrogen bonded systems of Phenylacetylene: A Matrix Isolation Infrared and Ab Initio Study. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1166-1] [Citation(s) in RCA: 10] [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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16
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BANERJEE PUJARINI, BHATTACHARYA INDRANI, CHAKRABORTY TAPAS. Matrix isolation infrared spectra of O-H ⋯ π Hydrogen bonded complexes of Acetic acid and Trifluoroacetic acid with Benzene. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1165-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Banerjee P, Bhattacharya I, Chakraborty T. Matrix Isolation Infrared Spectroscopy of an O–H···π Hydrogen-Bonded Complex between Formic Acid and Benzene. J Phys Chem A 2016; 120:3731-9. [DOI: 10.1021/acs.jpca.6b03447] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pujarini Banerjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Indrani Bhattacharya
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Tapas Chakraborty
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
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18
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Boganov SE, Promyslov VM, Krylova IV, Zaitseva GS, Egorov MP. Mechanism of thermal decomposition of allyltrichlorosilane with formation of three labile intermediates: dichlorosilylene, allyl radical, and atomic chlorine. Russ Chem Bull 2016. [DOI: 10.1007/s11172-016-1438-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Zhao H, Chang J, Du L. Effect of hydrogen bonding on the spectroscopic properties of molecular complexes with aromatic rings as acceptors. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Zhao H, Tang S, Li S, Ding L, Du L. Theoretical investigation of the hydrogen bond interactions of methanol and dimethylamine with hydrazone and its derivatives. Struct Chem 2016. [DOI: 10.1007/s11224-016-0749-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Ramanathan N, Sundararajan K, Vidya K, Jemmis ED. Non-covalent C-Cl…π interaction in acetylene-carbon tetrachloride adducts: Matrix isolation infrared and ab initio computational studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 157:69-78. [PMID: 26722673 DOI: 10.1016/j.saa.2015.12.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/23/2015] [Accepted: 12/14/2015] [Indexed: 06/05/2023]
Abstract
Non-covalent halogen-bonding interactions between π cloud of acetylene (C2H2) and chlorine atom of carbon tetrachloride (CCl4) have been investigated using matrix isolation infrared spectroscopy and quantum chemical computations. The structure and the energies of the 1:1 C2H2-CCl4 adducts were computed at the B3LYP, MP2 and M05-2X levels of theory using 6-311++G(d,p) basis set. The computations indicated two minima for the 1:1 C2H2-CCl4 adducts; with the C-Cl…π adduct being the global minimum, where π cloud of C2H2 is the electron donor. The second minimum corresponded to a C-H…Cl adduct, in which C2H2 is the proton donor. The interaction energies for the adducts A and B were found to be nearly identical. Experimentally, both C-Cl…π and C-H…Cl adducts were generated in Ar and N2 matrixes and characterized using infrared spectroscopy. This is the first report on halogen bonded adduct, stabilized through C-Cl…π interaction being identified at low temperatures using matrix isolation infrared spectroscopy. Atoms in Molecules (AIM) and Natural Bond Orbital (NBO) analyses were performed to support the experimental results. The structures of 2:1 ((C2H2)2-CCl4) and 1:2 (C2H2-(CCl4)2) multimers and their identification in the low temperature matrixes were also discussed.
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Affiliation(s)
- N Ramanathan
- Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sundararajan
- Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
| | - K Vidya
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695016, India
| | - Eluvathingal D Jemmis
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India.
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Verma K, Dave K, Viswanathan KS. Hydrogen-Bonded Complexes of Phenylacetylene-Acetylene: Who is the Proton Donor? J Phys Chem A 2015; 119:12656-64. [PMID: 26643730 DOI: 10.1021/acs.jpca.5b08559] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrogen-bonded complexes of C2H2 and phenylacetylene (PhAc) were studied using matrix isolation infrared spectroscopy and quantum chemical computations. Both C2H2 and PhAc, being potential proton donors, the question arises as to which of the two species would be the proton donor in the PhAc-C2H2 complex; a question that this work primarily addresses. The molecular structures, vibrational frequencies, and interaction energies of the PhAc-C2H2 complexes were calculated at the M06-2X and MP2 levels of theory, employing both 6-311++G(d,p) and aug-cc-pVDZ basis sets. At the M06-2X/aug-cc-pVDZ level, two nearly isoenergetic complexes (BSSE corrected) were indicated to be the global minima; one a C-H···π complex, where C2H2 served as a proton donor to the phenyl π-system in PhAc, and the other a C-H···π complex, where C2H2 served as a proton donor to the acetylene π-system in PhAc. Of the two, only the second complex was identified in the matrix, evidenced by a characteristic large shift in the ≡C-H stretch of C2H2. Experiments were also performed using PhAc deuterated at the acetylene hydrogen (PhAcD) to study the isotopic effects on the vibrational spectra of complexes. The isotopic studies further confirmed the structure of the complex trapped in the matrix, thereby presenting unambiguous evidence that C2H2 served as the proton donor to the acetylene π-system of PhAc. The theory of atoms-in-molecules (AIM), energy decomposition (EDA), and natural bond orbital (NBO) analysis were performed to understand the nature of the interactions involved in the complexes.
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Affiliation(s)
- Kanupriya Verma
- Department of Chemistry, Indian Institute of Science Education and Research , Sector 81, Mohali 140306, Punjab, India
| | - Kapil Dave
- Department of Chemistry, Indian Institute of Science Education and Research , Sector 81, Mohali 140306, Punjab, India
| | - K S Viswanathan
- Department of Chemistry, Indian Institute of Science Education and Research , Sector 81, Mohali 140306, Punjab, India
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Heger M, Mata RA, Suhm MA. Soft hydrogen bonds to alkenes: the methanol-ethene prototype under experimental and theoretical scrutiny. Chem Sci 2015; 6:3738-3745. [PMID: 29218143 PMCID: PMC5707488 DOI: 10.1039/c5sc01002k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 04/23/2015] [Indexed: 02/05/2023] Open
Abstract
An FTIR spectroscopic study of the elusive hydrogen-bonded methanol-ethene complex, the most elementary example for weak intermolecular alcohol hydrogen bonding to a π cloud, is presented. By isolating the complex in a supersonic jet, the rigorous comparability to high-level quantum chemical calculations is ensured. In stark contrast to classical hydrogen bonds, experimental overtone analysis reveals the harmonic oscillator approximation for the OH red shift to be accurate. Harmonic calculations up to explicitly correlated local coupled-cluster level are thus found to agree very well with experiment. The experimental OH values for the red shift (45 cm-1), the small change in diagonal anharmonicity (-3 cm-1) and the overtone intensity attenuation (2 × 102-fold) together with theoretical predictions for the preferred structural arrangement and the zero-point-corrected dissociation energy (8 kJ mol-1) may thus be regarded as definitive reference values for related systems and for more approximate computational methods. In particular, MP2 calculations are shown to fail for this kind of weak intermolecular interaction.
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Affiliation(s)
- Matthias Heger
- Institut für Physikalische Chemie , Universität Göttingen , Tammannstr. 6 , 37077 Göttingen , Germany .
| | - Ricardo A Mata
- Institut für Physikalische Chemie , Universität Göttingen , Tammannstr. 6 , 37077 Göttingen , Germany .
| | - Martin A Suhm
- Institut für Physikalische Chemie , Universität Göttingen , Tammannstr. 6 , 37077 Göttingen , Germany .
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24
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Medel R, Heger M, Suhm MA. Molecular Docking via Olefinic OH···π Interactions: A Bulky Alkene Model System and Its Cooperativity. J Phys Chem A 2014; 119:1723-30. [DOI: 10.1021/jp508424p] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Robert Medel
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany
| | - Matthias Heger
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany
| | - Martin A. Suhm
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany
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26
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Tsuge M, Lignell A, Räsänen M, Khriachtchev L. Environmental effects on noble-gas hydrides: HXeBr, HXeCCH, and HXeH in noble-gas and molecular matrices. J Chem Phys 2013; 139:204303. [DOI: 10.1063/1.4832384] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Golovkin A, Davlyatshin D, Serebrennikova A, Serebrennikov L. Acetylene associates (C2H2)n (n=2–4). IR-spectra in argon matrixes and quantum-chemical calculations. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.06.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Du L, Mackeprang K, Kjaergaard HG. Fundamental and overtone vibrational spectroscopy, enthalpy of hydrogen bond formation and equilibrium constant determination of the methanol-dimethylamine complex. Phys Chem Chem Phys 2013; 15:10194-206. [PMID: 23695525 DOI: 10.1039/c3cp50243k] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have measured gas phase vibrational spectra of the bimolecular complex formed between methanol (MeOH) and dimethylamine (DMA) up to about 9800 cm(-1). In addition to the strong fundamental OH-stretching transition we have also detected the weak second overtone NH-stretching transition. The spectra of the complex are obtained by spectral subtraction of the monomer spectra from spectra recorded for the mixture. For comparison, we also measured the fundamental OH-stretching transition in the bimolecular complex between MeOH and trimethylamine (TMA). The enthalpies of hydrogen bond formation (ΔH) for the MeOH-DMA and MeOH-TMA complexes have been determined by measurements of the fundamental OH-stretching transition in the temperature range from 298 to 358 K. The enthalpy of formation is found to be -35.8 ± 3.9 and -38.2 ± 3.3 kJ mol(-1) for MeOH-DMA and MeOH-TMA, respectively, in the 298 to 358 K region. The equilibrium constant (Kp) for the formation of the MeOH-DMA complex has been determined from the measured and calculated transition intensities of the OH-stretching fundamental transition and the NH-stretching second overtone transition. The transition intensities were calculated using an anharmonic oscillator local mode model with dipole moment and potential energy curves calculated using explicitly correlated coupled cluster methods. The equilibrium constant for formation of the MeOH-DMA complex was determined to be 0.2 ± 0.1 atm(-1), corresponding to a ΔG value of about 4.0 kJ mol(-1).
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Affiliation(s)
- Lin Du
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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Kolev SK, Petkov PS, Rangelov MA, Vayssilov GN. Density Functional Study of Hydrogen Bond Formation between Methanol and Organic Molecules Containing Cl, F, NH2, OH, and COOH Functional Groups. J Phys Chem A 2011; 115:14054-68. [DOI: 10.1021/jp204313f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan K. Kolev
- Faculty of Chemistry, University of Sofia, Boulevard James Bouchier 1, 1126 Sofia, Bulgaria
| | - Petko St. Petkov
- Faculty of Chemistry, University of Sofia, Boulevard James Bouchier 1, 1126 Sofia, Bulgaria
| | - Miroslav A. Rangelov
- Laboratory of BioCatalysis, Institute of Organic Chemistry, Bulgarian Academy of Sciences, Str. Acad. G. Bontchev, Bl. 9, 1113 Sofia, Bulgaria
| | - Georgi N. Vayssilov
- Faculty of Chemistry, University of Sofia, Boulevard James Bouchier 1, 1126 Sofia, Bulgaria
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30
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Nishio M. The CH/π hydrogen bond in chemistry. Conformation, supramolecules, optical resolution and interactions involving carbohydrates. Phys Chem Chem Phys 2011; 13:13873-900. [PMID: 21611676 DOI: 10.1039/c1cp20404a] [Citation(s) in RCA: 624] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The CH/π hydrogen bond is an attractive molecular force occurring between a soft acid and a soft base. Contribution from the dispersion energy is important in typical cases where aliphatic or aromatic CH groups are involved. Coulombic energy is of minor importance as compared to the other weak hydrogen bonds. The hydrogen bond nature of this force, however, has been confirmed by AIM analyses. The dual characteristic of the CH/π hydrogen bond is the basis for ubiquitous existence of this force in various fields of chemistry. A salient feature is that the CH/π hydrogen bond works cooperatively. Another significant point is that it works in nonpolar as well as polar, protic solvents such as water. The interaction energy depends on the nature of the molecular fragments, CH as well as π-groups: the stronger the proton donating ability of the CH group, the larger the stabilizing effect. This Perspective focuses on the consequence of this molecular force in the conformation of organic compounds and supramolecular chemistry. Implication of the CH/π hydrogen bond extends to the specificity of molecular recognition or selectivity in organic reactions, polymer science, surface phenomena and interactions involving proteins. Many problems, unsettled to date, will become clearer in the light of the CH/π paradigm.
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Affiliation(s)
- Motohiro Nishio
- The CHPI Institute, 705-6-338 Minamioya, Machida-shi, Tokyo, 194-0031, Japan.
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31
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Kar BP, Ramanathan N, Sundararajan K, Viswanathan K. Matrix isolation FTIR studies of non-planar trans-stilbene. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.03.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Takahashi O, Kohno Y, Nishio M. Relevance of weak hydrogen bonds in the conformation of organic compounds and bioconjugates: evidence from recent experimental data and high-level ab initio MO calculations. Chem Rev 2011; 110:6049-76. [PMID: 20550180 DOI: 10.1021/cr100072x] [Citation(s) in RCA: 447] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Osamu Takahashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima, 739-8526, Japan.
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Lanza G, Minichino C. How an Inert-Gas Matrix Can Modify the Molecular Properties of Lanthanide Trifluoride. Chemphyschem 2009; 10:507-11. [DOI: 10.1002/cphc.200800643] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Sundararajan K, Ramanathan N. Acetylene–phenol complexes: A matrix isolation infrared and ab initio study. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2008.11.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Mardyukov A, Sánchez-García E, Sander W. Matrix Isolation and Ab Initio Study of the Noncovalent Complexes between Formamide and Acetylene. J Phys Chem A 2009; 113:1086-95. [DOI: 10.1021/jp806675n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Artur Mardyukov
- Lehrstuhl für Organische Chemie II der Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Elsa Sánchez-García
- Lehrstuhl für Organische Chemie II der Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Wolfram Sander
- Lehrstuhl für Organische Chemie II der Ruhr-Universität Bochum, D-44780 Bochum, Germany
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36
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Nishio M, Umezawa Y, Honda K, Tsuboyama S, Suezawa H. CH/π hydrogen bonds in organic and organometallic chemistry. CrystEngComm 2009. [DOI: 10.1039/b902318f] [Citation(s) in RCA: 481] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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37
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K. V. JJ, Gadre SR. Electrostatic guidelines and molecular tailoring for density functional investigation of structures and energetics of (Li)n clusters. J Chem Phys 2008; 129:164314. [DOI: 10.1063/1.2993169] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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Jose KVJ, Gadre SR. An ab initio investigation on (CO2)n and CO2(Ar)m clusters: geometries and IR spectra. J Chem Phys 2008; 128:124310. [PMID: 18376922 DOI: 10.1063/1.2838202] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
An ab initio investigation on CO(2) homoclusters is done at MPWB1K6-31++G(2d) level of theory. Electrostatic guidelines are found to be useful for generating initial structures of (CO(2))(n) clusters. The ab initio minimum energy geometries of (CO(2))(n) with n=2-8 are T shaped, cyclic, trigonal pyramidal, tetragonal pyramidal, tetragonal bipyramidal, pentagonal bipyramidal, and pentagonal bipyramid with one CO(2) molecule attached to it. A test calculation on (CO(2))(20) cluster is also reported. The geometric parameters of the energetically most favored (CO(2))(n) clusters match quite well their experimental counterparts (wherever available) as well as those derived from molecular dynamics studies. The effect of clustering is quantified through the asymmetric C-O stretching frequency shift relative to the single CO(2) molecule. (CO(2))(n) clusters show an increasing blueshift from 1.8 to 9.6 cm(-1) on increasing number of CO(2) molecules from n=2 to 8. The energetics and geometries of CO(2)(Ar)(m) clusters have also been explored at the same level of theory. The geometries for m=1-6 show a predominant T type of the argon-CO(2) molecule interaction. Higher clusters with m=7-12 show that the argon atoms cluster around the oxygen atom after the saturation of the central carbon atom. The CO(2)(Ar)(m) clusters exhibit an increasing redshift in the C-O asymmetric stretch relative to CO(2) molecule of 0.7-5.6 cm(-1) with increasing number of argon atoms through m=1-8.
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Affiliation(s)
- K V Jovan Jose
- Department of Chemistry, University of Pune, Ganeshkhind 411007, India
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