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Actual Symmetry of Symmetric Molecular Adducts in the Gas Phase, Solution and in the Solid State. Symmetry (Basel) 2021. [DOI: 10.3390/sym13050756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
This review discusses molecular adducts, whose composition allows a symmetric structure. Such adducts are popular model systems, as they are useful for analyzing the effect of structure on the property selected for study since they allow one to reduce the number of parameters. The main objectives of this discussion are to evaluate the influence of the surroundings on the symmetry of these adducts, steric hindrances within the adducts, competition between different noncovalent interactions responsible for stabilizing the adducts, and experimental methods that can be used to study the symmetry at different time scales. This review considers the following central binding units: hydrogen (proton), halogen (anion), metal (cation), water (hydrogen peroxide).
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Symmetry/Asymmetry of the NHN Hydrogen Bond in Protonated 1,8-Bis(dimethylamino)naphthalene. Symmetry (Basel) 2020. [DOI: 10.3390/sym12111924] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Experimental and theoretical results are presented based on vibrational spectra and motional dynamics of 1,8-bis(dimethylamino)naphthalene (DMAN) and its protonated forms (DMANH+ and the DMANH+ HSO4− complex). The studies of these compounds have been performed in the gas phase and solid-state. Spectroscopic investigations were carried out by infrared spectroscopy (IR), Raman, and incoherent inelastic neutron scattering (IINS) experimental methods. Density functional theory (DFT) and Car–Parrinello molecular dynamics (CPMD) methods were applied to support our experimental findings. The fundamental investigations of hydrogen bridge vibrations were accomplished on the basis of isotopic substitutions (NH → ND). Special attention was paid to the bridged proton dynamics in the DMANH+ complex, which was found to be affected by interactions with the HSO4− anion.
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3
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Saunders LK, Nowell H, Spencer HCE, Hatcher LE, Shepherd HJ, Thomas LH, Jones CL, Teat SJ, Raithby PR, Wilson CC. Tuning charge-assisted and weak hydrogen bonds in molecular complexes of the proton sponge DMAN by acid co-former substitution. CrystEngComm 2018. [DOI: 10.1039/c8ce00443a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Varying the electronic character of the acid co-former substituent group predictably alters weak and strong intermolecular interactions.
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Affiliation(s)
- Lucy K. Saunders
- Diamond Light Source
- Harwell Science and Innovation Campus
- Didcot
- UK
| | - Harriott Nowell
- Diamond Light Source
- Harwell Science and Innovation Campus
- Didcot
- UK
| | | | | | - Helena J. Shepherd
- Department of Chemistry
- University of Bath
- Bath
- UK
- School of Physical Sciences
| | | | | | - Simon J. Teat
- Advanced Light Source
- Lawrence Berkeley National Lab
- Berkeley
- USA
| | - Paul R. Raithby
- Department of Chemistry
- University of Bath
- Bath
- UK
- Research Complex at Harwell
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4
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Masuda Y, Mori Y, Sakurai K. Effects of Counterion and Solvent on Proton Location and Proton Transfer Dynamics of N–H···N Hydrogen Bond of Monoprotonated 1,8-Bis(dimethylamino)naphthalene. J Phys Chem A 2013; 117:10576-87. [DOI: 10.1021/jp4061297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuichi Masuda
- Department of Chemistry,
Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
| | - Yukie Mori
- Department of Chemistry,
Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
| | - Kazumi Sakurai
- Department of Chemistry,
Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
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5
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Bernatowicz P. Accurate determination of the ultrafast proton transfer rate in porphycene using nuclear spin relaxation. Phys Chem Chem Phys 2013; 15:8732-5. [DOI: 10.1039/c3cp50963j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Mori Y, Takano K. Location of protons in N–H⋯N hydrogen-bonded systems: a theoretical study on intramolecular pyridine–dihydropyridine and pyridine–pyridinium pairs. Phys Chem Chem Phys 2012; 14:11090-8. [DOI: 10.1039/c2cp41425b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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López C, Lorente P, Claramunt RM, Marín J, Foces-Foces C, Llamas-Saiz AL, Elguero J, Limbach HH. Localization of hydrogen bond deuterons in proton sponges by dipolar solid state 15N NMR spectroscopy. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19981020320] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Majerz I, Olovsson I. Proton transfer in the intramolecular NHN+ bonds in proton sponges with different hydrogen bridge flexibility. Phys Chem Chem Phys 2009; 11:1297-302. [DOI: 10.1039/b814798a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Bernatowicz P, Kowalewski J. Carbon-13 NMR Relaxation Study of 1,8-Bis(dimethylamino)naphthalene in Isotropic Solution. J Phys Chem A 2008; 112:4711-4. [DOI: 10.1021/jp802319g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Piotr Bernatowicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
| | - Jozef Kowalewski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Department of Physical, Inorganic and Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
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10
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11
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Dobrzycki L, Chruszcz M, Minor W, Woźniak K. Stacks of DMANH+– scaffolding for ribbon shaped Cl−bridged oxonium ions. CrystEngComm 2007. [DOI: 10.1039/b614785b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Ohashi Y, Hosoya T, Ohhara T. Hydrogen migration mechanism in crystalline-state photoisomerization by analyzed neutron diffraction. CRYSTALLOGR REV 2006. [DOI: 10.1080/08893110600703227] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Bernatowicz P, Kowalewski J, Sandström D. NMR Relaxation Study of the Protonated Form of 1,8-Bis(dimethylamino)naphthalene in Isotropic Solution: Anisotropic Motion outside of Extreme Narrowing and Ultrafast Proton Transfer. J Phys Chem A 2004; 109:57-63. [PMID: 16839089 DOI: 10.1021/jp045454n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The protonated form of 1,8-bis(dimethylamino)naphthalene (DMANH(+)) consists of a rigid, aromatic framework, substituted by two amino groups that are connected by a strong, symmetric (on the NMR time-scale) hydrogen bond bridge. The reorientational motion of the molecule in dimethylformamide-d7 solution was characterized by T(1) and NOE measurements for aromatic (13)C nuclei. Treating the reorientation of DMANH(+) as anisotropic rotational diffusion of a rigid body, the diffusion tensor was determined with good accuracy. Measurements and interpretation of (15)N T(1) and NOE indicate that the proton transfer between potential minima in the hydrogen bond bridge is faster than the molecular reorientation.
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Affiliation(s)
- Piotr Bernatowicz
- Physical Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
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14
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15
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Wozniak K, Mallinson PR, Smith GT, Wilson CC, Grech E. Role of C?H���O hydrogen bonds in the ionic complexes of 1,8-bis(dimethylamino)naphthalene. J PHYS ORG CHEM 2003. [DOI: 10.1002/poc.683] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Woźniak K, Mallinson PR, Wilson CC, Hovestreydt E, Grech E. Charge Density Studies of Weak Interactions in Dipicrylamine. J Phys Chem A 2002. [DOI: 10.1021/jp014733x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Krzysztof Woźniak
- Chemistry Department, Warsaw University, 02 093 Warszawa, ul. Pasteura 1, Poland
| | | | - Chick C. Wilson
- ISIS Fascility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, U.K
| | - Eric Hovestreydt
- Brucker AXS GMBH., Östl., Rheinbrückenstr. 50, D-76187 Karlsruhe, Germany
| | - Eugeniusz Grech
- Institute of Chemistry and Enviromental Protection, Technical University of Szczecin, Piastów 42, 71 065 Szczecin, Poland
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Raab V, Kipke J, Gschwind RM, Sundermeyer J. 1,8-bis(tetramethylguanidino)naphthalene (TMGN): a new, superbasic and kinetically active "proton sponge". Chemistry 2002; 8:1682-93. [PMID: 11933096 DOI: 10.1002/1521-3765(20020402)8:7<1682::aid-chem1682>3.0.co;2-r] [Citation(s) in RCA: 157] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
1,8-Bis(tetramethylguanidino)naphthalene (TMGN, 1) is a new, readily accessible, and stable "proton sponge" with an experimental pK(BH(+)) value of 25.1 in MeCN, which is nearly seven orders of magnitude higher in basicity than the classical proton sponge 1,8-bis(dimethylamino)-naphthalene (DMAN). Because of the sterically less crowded character of the proton-accepting sp(2)-nitrogen atoms, TMGN also has a higher kinetic basicity than DMAN, which is shown by time-resolved proton self-exchange reactions. TMGN is more resistant to hydrolysis and is a weaker nucleophile towards the alkylating agent EtI in comparison to the commercially available guanidine 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD). Crystal structures of the free base, of the mono- and bisprotonated base were determined. The dynamic behavior of all three species in solution was investigated by variable-temperature (1)H NMR experiments. DeltaG (++) values obtained by spectra simulation reveal a concerted mechanism of rotation about the C-N bonds of the protonated forms of TMGN.
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Affiliation(s)
- Volker Raab
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Strasse, 35032 Marburg, Germany
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Ozeryanskii V, Pozharskii A, Głowiak T, Majerz I, Sobczyk L, Grech E, Nowicka-Scheibe J. X-ray diffraction and IR-spectroscopic studies on protonated 4-amino-1,8-bis(dimethylamino)naphthalene. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(01)00887-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Perrin CL, Ohta BK. Symmetry of N-H-N hydrogen bonds in 1,8-bis(dimethylamino)naphthalene.H+ and 2,7-dimethoxy-1,8-bis(dimethylamino)naphthalene.H+. J Am Chem Soc 2001; 123:6520-6. [PMID: 11439038 DOI: 10.1021/ja0036965] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In solution, are the hydrogen bonds in monoprotonated N,N,N',N'-tetramethyl-1,8-naphthalenediamines single- or double-well? To answer this question, isotopic perturbation of equilibrium is applied to a mixture of -d(0), -d(3), -d(6), -d(9), and -d(12) isotopologs. The N-methyls of the 2,7-dimethoxy analogue show intrinsic isotope shifts from the geminal CD(3) and from only one distant CD(3), an unusual stereochemical effect transmitted across the hydrogen bond. The (13)C NMR splittings and intensities at the various ring carbons of both ions are consistent with perturbation isotope shifts, intrinsic shifts, or a combination of both. The perturbation shifts mean that the protons reside in a double-minimum potential and that each ion is a pair of rapidly interconverting tautomers. The significance of this result for the role of low-barrier hydrogen bonds in enzyme-catalyzed reactions is discussed.
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Affiliation(s)
- C L Perrin
- Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, CA 92093-0358, USA
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Fox MA, Goeta AE, Howard JA, Hughes AK, Johnson AL, Keen DA, Wade K, Wilson CC. The molecular structure of (PSH+)(nido-7,8-C2B9H12-) determined by neutron diffraction (PS = proton sponge, 1,8-bis(dimethylamino)naphthalene). Inorg Chem 2001; 40:173-5. [PMID: 11195377 DOI: 10.1021/ic000961e] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M A Fox
- Department of Chemistry, University of Durham, South Road, Durham, U.K. DH1 3LE
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21
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Baran J, Pawlukojć A, Majerz I, Malarski Z, Sobczyk L, Grech E. Vibrational spectra of the adduct of 1,8-bis(dimethylamino)naphthalene with dichloromaleic acid (DMAN x DCM). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2000; 56A:1801-1812. [PMID: 10952142 DOI: 10.1016/s1386-1425(00)00239-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The infra-red (IR), Raman (R) and inelastic incoherent neutron scattering (IINS) spectra, particularly in low frequency region, of the title ionic adduct were studied. It is shown that all low frequency vibrations (below 200 cm(-1)) of (CH3)2N groups of protonated 1,8-bis(dimethylamino)naphthalene (DMAN)--clearly observed in IINS spectra--are sensitive to the environment, i.e. to the type of counterion forming short contacts with C-H bonds of methyl groups. The internal frequencies were also calculated by ab initio method. The results are consistent with numerous observations of the counteranion effect on the geometry of the protonated DMAN. The conclusions are compared with structural and NMR studies reported recently for the 1,8-bis(dimethylamino)naphthalene with dichloromaleic acid (DMAN x DCM) adduct. The single crystal R polarized spectra taken over the frequency range 20-3200 cm(-1) were analyzed in detail. We have shown that a substantial difference in the IR spectrum of the dichloromaleic acid (DCM) anion in the DMAN adduct and in the potassium salt results from different geometries of OHO hydrogen bonds. In the case of potassium salt the chains of longer intermolecular hydrogen bonds are formed described by means of a double minimum potential.
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Affiliation(s)
- J Baran
- Institute of Low Temperature and Structural Research, Wrocław, Poland
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22
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Madsen GKH, Wilson C, Nymand TM, McIntyre GJ, Larsen FK. The Structure of Nitromalonamide: A Combined Neutron-Diffraction and Computational Study of a Very Short Hydrogen Bond. J Phys Chem A 1999. [DOI: 10.1021/jp991102i] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Georg K. H. Madsen
- Department of Chemistry, University of Aarhus, DK-8000 Århus C., and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - Claire Wilson
- Department of Chemistry, University of Aarhus, DK-8000 Århus C., and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - Thomas M. Nymand
- Department of Chemistry, University of Aarhus, DK-8000 Århus C., and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - Garry J. McIntyre
- Department of Chemistry, University of Aarhus, DK-8000 Århus C., and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - Finn K. Larsen
- Department of Chemistry, University of Aarhus, DK-8000 Århus C., and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
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23
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Mallinson PR, Woźniak K, Wilson CC, McCormack KL, Yufit DS. Charge Density Distribution in the “Proton Sponge” Compound 1,8-Bis(dimethylamino)naphthalene. J Am Chem Soc 1999. [DOI: 10.1021/ja983393z] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul R. Mallinson
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, U.K., Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland, and ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, U.K
| | - Krzysztof Woźniak
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, U.K., Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland, and ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, U.K
| | - Chick C. Wilson
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, U.K., Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland, and ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, U.K
| | - Kirsty L. McCormack
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, U.K., Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland, and ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, U.K
| | - Dmitrii S. Yufit
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, U.K., Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland, and ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX, U.K
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Grech E, Malarski Z, Sawka-Dobrowolska W, Sobczyk L. Low-temperature (120 K) structure and vibrational spectrum of protonated proton sponge: the adduct of 1,8-bis(dimethylamino)naphthalene (DMAN) with 4,5- dicyanoimidazole (DCI). J PHYS ORG CHEM 1999. [DOI: 10.1002/(sici)1099-1395(199904)12:4<313::aid-poc110>3.0.co;2-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Basato M, Detomi N, Meneghetti M, Valle G, Veronese AC. Metal(II) complexes of the carbonylnitronate ligands O2NCHC(O)R− (R=Ph, OMe or OEt) and X-ray structure of (DMANH)[Ni(O2NCHC(O)Ph)3] (DMAN=1,8-bis(dimethylamino)naphthalene). Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(98)00256-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
Hydrogen bonds are a key feature of chemical structure and reactivity. Recently there has been much interest in a special class of hydrogen bonds called "strong" or "low-barrier" and characterized by great strength, short distances, a low or vanishing barrier to hydrogen transfer, and distinctive features in the NMR spectrum. Although the energy of an ordinary hydrogen bond is ca 5 kcal mol-1, the strength of these hydrogen bonds may be > or = 10 kcal mol-1. The properties of these hydrogen bonds have been investigated by many experimental techniques, as well as by calculation and by correlations among those properties. Although it has been proposed that strong, short, low-barrier hydrogen bonds are important in enzymatic reactions, it is concluded that the evidence for them in small molecules and in biomolecules is inconclusive.
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Affiliation(s)
- C L Perrin
- Department of Chemistry, University of California San Diego, La Jolla 92093-0358, USA.
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Mallinson PR, Woźniak K, Smith GT, McCormack KL. A Charge Density Analysis of Cationic and Anionic Hydrogen Bonds in a “Proton Sponge” Complex. J Am Chem Soc 1997. [DOI: 10.1021/ja971940v] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paul R. Mallinson
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, UK, and Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland
| | - Krzysztof Woźniak
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, UK, and Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland
| | - Garry T. Smith
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, UK, and Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland
| | - Kirsty L. McCormack
- Contribution from the Chemistry Department, University of Glasgow, Glasgow G12 8QQ, UK, and Chemistry Department, University of Warsaw, 02-093 Warszawa, ul. Pasteura 1, Poland
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Wo?naik K, Krygowski TM, Pawlak D, Kolodziejski W, Grech E. Solid-state NMR and x-ray diffraction studies of ionic complex of 1,8-bis(dimethylamino)naphthalene (DMAN) with picrolonic acid. J PHYS ORG CHEM 1997. [DOI: 10.1002/(sici)1099-1395(199711)10:11<814::aid-pca953>3.0.co;2-s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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