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Jessen LM, Sauer SPA. On the performance of HRPA(D) for NMR spin-spin coupling constants: Smaller molecules, aromatic and fluoroaromatic compounds. J Chem Phys 2024; 160:064102. [PMID: 38341775 DOI: 10.1063/5.0189932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 01/15/2024] [Indexed: 02/13/2024] Open
Abstract
In this study, the performance of the doubles-corrected higher random-phase approximation [HRPA(D)] has been investigated in calculations of nuclear magnetic resonance spin-spin coupling constants (SSCCs) for 58 molecules with the experimental values used as the reference values. HRPA(D) is an approximation to the second-order polarization propagator approximation (SOPPA) and is, therefore, computationally less expensive than SOPPA. HRPA(D) performs comparable and sometimes even better than SOPPA, and therefore, when calculating SSCCs, it should be considered as an alternative to SOPPA. Furthermore, it was investigated whether a coupled-cluster singles, doubles and perturbative triples [CCSD(T)] or Møller-Plesset second order (MP2) geometry optimization was optimal for a SOPPA and a HRPA(D) SSCC calculation for eight smaller molecules. CCSD(T) is the optimal geometry optimization for the SOPPA calculation, and MP2 was optimal for HRPA(D) SSCC calculations.
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Affiliation(s)
- Louise Møller Jessen
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | - Stephan P A Sauer
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
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2
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Chen CP, Alharbi W, Cundari TR, Hamann TW, Smith MR. Deciphering the Mechanism of Base-Triggered Conversion of Ammonia to Molecular Nitrogen and Methylamine to Cyanide. J Am Chem Soc 2023; 145:26339-26349. [PMID: 38011890 DOI: 10.1021/jacs.3c09879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
We report an in-depth investigation into the ammonia oxidation mechanism by the catalyst [RuIII(tpy)(dmabpy)NH3]3+ ([Ru(NH3)]3+). Stoichiometric reactions of [Ru(NH3)]3+ were carried out with exogenous noncoordinating bases to trigger a proposed redox disproportionation reaction, which was followed using variable-temperature NMR spectroscopy. An intermediate species was identified as a dinitrogen-bridged complex using 15N NMR and Raman spectroscopy on isotopically labeled complexes. This intermediate is proposed to derive from coupling of nitridyl species formed upon sequential redox disproportion reactions. Acetonitrile displaces the dinitrogen bridge to yield free N2. DFT calculations support this lower-energy pathway versus that previously reported for ammonia oxidation by the parent [RuIII(tpy)(bpy)NH3]3+ complex. These experimental and computational results are consistent with the interpretation of redox disproportionation involving sequential hydrogen atom transfer reactions by an amide/aminyl intermediate, [Ru(NH2)-]+ ⇔ [Ru(NH2)•]+, formed upon deprotonation of the parent complex. Control experiments employing a large excess of ammonia as a base indicate this new proposed lower-energy pathway contributes to the oxidation of ammonia to dinitrogen in conditions relevant to electrocatalysis. In addition, analogous methylamine complexes, [Ru(NH2CH3)]2+/3+, were prepared to further test the proposed mechanism. Treating [Ru(NH2CH3)]3+ with a base cleanly yields two products [Ru(NH2CH3)]2+ and [Ru(CN)]+ in an ∼3:1 ratio, fully consistent with the proposed cascade of hydrogen atom transfer reactions by an intermediate.
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Affiliation(s)
- Chuan-Pin Chen
- Department of Chemistry, Michigan State University, 578 S Shaw Ln, East Lansing, Michigan 48824, United States
| | - Waad Alharbi
- Department of Chemistry, Center of Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Thomas R Cundari
- Department of Chemistry, Center of Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Thomas W Hamann
- Department of Chemistry, Michigan State University, 578 S Shaw Ln, East Lansing, Michigan 48824, United States
| | - Milton R Smith
- Department of Chemistry, Michigan State University, 578 S Shaw Ln, East Lansing, Michigan 48824, United States
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Hapka M, Jaszuński M. The effect of weak intermolecular interactions on the nuclear magnetic resonance shielding constant in N 2. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:245-248. [PMID: 31680305 DOI: 10.1002/mrc.4943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/14/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Ab initio calculations are applied to examine the influence of the intermolecular interactions on the shielding constant in gaseous nitrogen. An accurate literature potential energy surface and the nuclear magnetic resonance shielding surface of the N2 -N2 complex calculated in this work provide results in satisfactory agreement with the available experimental estimates of the effect.
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Affiliation(s)
- Michał Hapka
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warszawa, Poland
| | - Michał Jaszuński
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224, Warszawa, Poland
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Bhattacharya P, Heiden ZM, Chambers GM, Johnson SI, Bullock RM, Mock MT. Catalytic Ammonia Oxidation to Dinitrogen by Hydrogen Atom Abstraction. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903221] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Papri Bhattacharya
- Center for Molecular Electrocatalysis Pacific Northwest National Laboratory P.O. Box 999 Richland WA 99352 USA
| | | | - Geoffrey M. Chambers
- Center for Molecular Electrocatalysis Pacific Northwest National Laboratory P.O. Box 999 Richland WA 99352 USA
| | - Samantha I. Johnson
- Center for Molecular Electrocatalysis Pacific Northwest National Laboratory P.O. Box 999 Richland WA 99352 USA
| | - R. Morris Bullock
- Center for Molecular Electrocatalysis Pacific Northwest National Laboratory P.O. Box 999 Richland WA 99352 USA
| | - Michael T. Mock
- Department of Chemistry and Biochemistry Montana State University Bozeman MT 59717 USA
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Bhattacharya P, Heiden ZM, Chambers GM, Johnson SI, Bullock RM, Mock MT. Catalytic Ammonia Oxidation to Dinitrogen by Hydrogen Atom Abstraction. Angew Chem Int Ed Engl 2019; 58:11618-11624. [PMID: 31115120 DOI: 10.1002/anie.201903221] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/06/2019] [Indexed: 12/20/2022]
Abstract
Catalysts for the oxidation of NH3 are critical for the utilization of NH3 as a large-scale energy carrier. Molecular catalysts capable of oxidizing NH3 to N2 are rare. This report describes the use of [Cp*Ru(PtBu 2 NPh 2 )(15 NH3 )][BArF 4 ], (PtBu 2 NPh 2 =1,5-di(phenylaza)-3,7-di(tert-butylphospha)cyclooctane; ArF =3,5-(CF3 )2 C6 H3 ), to catalytically oxidize NH3 to dinitrogen under ambient conditions. The cleavage of six N-H bonds and the formation of an N≡N bond was achieved by coupling H+ and e- transfers as net hydrogen atom abstraction (HAA) steps using the 2,4,6-tri-tert-butylphenoxyl radical (t Bu3 ArO. ) as the H atom acceptor. Employing an excess of t Bu3 ArO. under 1 atm of NH3 gas at 23 °C resulted in up to ten turnovers. Nitrogen isotopic (15 N) labeling studies provide initial mechanistic information suggesting a monometallic pathway during the N⋅⋅⋅N bond-forming step in the catalytic cycle.
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Affiliation(s)
- Papri Bhattacharya
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | | | - Geoffrey M Chambers
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - Samantha I Johnson
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - R Morris Bullock
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA, 99352, USA
| | - Michael T Mock
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, 59717, USA
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Garbacz P, Misiak M, Jackowski K. Interactions between nitrogen and oxygen molecules studied by gas-phase NMR spectroscopy. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.03.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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de Oliveira P, Gomes M, Pires J. Core–valence Gaussian basis sets of double and triple zeta quality for Li to Ar. Applications in calculations of indirect nuclear spin–spin coupling constants. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.07.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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Kupka T, Nieradka M, Stachów M, Pluta T, Nowak P, Kjær H, Kongsted J, Kaminsky J. Basis Set Convergence of Indirect Spin–Spin Coupling Constants in the Kohn–Sham Limit for Several Small Molecules. J Phys Chem A 2012; 116:3728-38. [DOI: 10.1021/jp212588h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Teobald Kupka
- Faculty of Chemistry, University of Opole, 45-052 Opole, Poland
| | | | - Michał Stachów
- Faculty of Chemistry, University of Opole, 45-052 Opole, Poland
| | - Tadeusz Pluta
- Institute of Chemistry, University of Silesia, 40-007 Katowice, Poland
| | - Piotr Nowak
- Technical University of Opole, Opole, Poland
| | - Hanna Kjær
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Jacob Kongsted
- Department of Physics, Chemistry
and Pharmacy, University of Southern Denmark, DK-5230 Odense, Denmark
| | - Jakub Kaminsky
- Institute of Organic Chemistry and Biochemistry, 166 10 Prague, Czech Republic
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10
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Hansen MB, Kongsted J, Toffoli D, Christiansen O. Vibrational Contributions to Indirect Spin−Spin Coupling Constants Calculated via Variational Anharmonic Approaches. J Phys Chem A 2008; 112:8436-45. [DOI: 10.1021/jp804306s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mikkel B. Hansen
- The Lundbeck Foundation Center for Theoretical Chemistry and Center for Oxygen Microscopy and Imaging, Department of Chemistry, University of Århus, Langelandsgade 140, DK-8000 Århus C, Denmark, and Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden
| | - Jacob Kongsted
- The Lundbeck Foundation Center for Theoretical Chemistry and Center for Oxygen Microscopy and Imaging, Department of Chemistry, University of Århus, Langelandsgade 140, DK-8000 Århus C, Denmark, and Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden
| | - Daniele Toffoli
- The Lundbeck Foundation Center for Theoretical Chemistry and Center for Oxygen Microscopy and Imaging, Department of Chemistry, University of Århus, Langelandsgade 140, DK-8000 Århus C, Denmark, and Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden
| | - Ove Christiansen
- The Lundbeck Foundation Center for Theoretical Chemistry and Center for Oxygen Microscopy and Imaging, Department of Chemistry, University of Århus, Langelandsgade 140, DK-8000 Århus C, Denmark, and Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden
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Alkorta I, Elguero J. Cation dinitrogen complexes [N(2)...X...N(2)]+, X+=H+, Li+, Na+, Be(2+), Mg(2+). SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 34:105-109. [PMID: 18406109 DOI: 10.1016/j.ssnmr.2008.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Accepted: 03/04/2008] [Indexed: 05/26/2023]
Abstract
The complexes of dinitrogen with five cations (H(+), Li(+), Na(+), Be(2+) and Mg(2+)) up to four N(2) molecules have been calculated at the MP2/6-311++G(d,p) level. Energetic and geometric aspects have been determined together with absolute shieldings (GIAO). The atoms in molecules methodology has been used to analyze energy, charge and volume of these complexes.
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Affiliation(s)
- Ibon Alkorta
- Instituto de Química Médica (CSIC), Juan de la Cierva, 3, E-28006 Madrid, Spain.
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San Fabián J, Díez E, García de la Vega JM, Suardíaz R. Approximating correlation effects in multiconfigurational self-consistent field calculations of spin-spin coupling constants. J Chem Phys 2008; 128:084108. [PMID: 18315034 DOI: 10.1063/1.2834210] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J San Fabián
- Departamento de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
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Pellizer G, Asaro F. 14N NMR spectra of molecular nitrogen in SDS/pentanol swollen lamellar phases. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46 Suppl 1:S80-S85. [PMID: 18855343 DOI: 10.1002/mrc.2299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
14N NMR spectra of air dissolved in lyotropic mesophases are reported. In order to observe the whole spectrum from a molecule in which the quadrupole coupling constant is on the order of a few megahertz, a weak alignment degree with respect to the magnetic field is mandatory. Therefore, dilute lyotropic liquid crystals, namely sodium dodecylsulphate (SDS)/pentanol swollen lamellar phases, were considered. The temperature dependence of the 14N quadrupolar splitting was followed both in the case of oil (either n-dodecane or n-heptane) and brine (a 0.2-M NaBr water solution) swelling. In the former, it paralleled the temperature dependence of the splittings of the alkane deuteria and, in both cases, it was opposite to 23Na quadrupolar splittings. Owing to the higher N2 solubility in hydrocarbons, the 14N NMR spectra provide complementary information to that obtained by means of the quadrupolar nuclei of water and hydrophilic solutes.
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Affiliation(s)
- Giorgio Pellizer
- Dipartimento di Scienze Chimiche, Università di Trieste, via L. Giorgieri 1, I-34127 Trieste, Italy.
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Abstract
Quantum chemical calculations provide new insights into the dependence of J(N,N) coupling tensors on bonding environment in a series of polynitrogen species including N(5)(+).
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Affiliation(s)
- David L Bryce
- Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5.
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Forgeron MAM, Gee M, Wasylishen RE. A Theoretical Investigation of One-Bond Phosphorus−Phosphorus Indirect Nuclear Spin−Spin Coupling Tensors, 1J(31P,31P), Using Density Functional Theory. J Phys Chem A 2004. [DOI: 10.1021/jp040034j] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michelle A. M. Forgeron
- Department of Chemistry, Gunning/Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Myrlene Gee
- Department of Chemistry, Gunning/Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Roderick E. Wasylishen
- Department of Chemistry, Gunning/Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
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Ruden TA, Lutnæs OB, Helgaker T, Ruud K. Vibrational corrections to indirect nuclear spin–spin coupling constants calculated by density-functional theory. J Chem Phys 2003. [DOI: 10.1063/1.1569846] [Citation(s) in RCA: 142] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mason J, Larkworthy LF, Moore EA. Nitrogen NMR spectroscopy of metal nitrosyls and related compounds. Chem Rev 2002; 102:913-34. [PMID: 11942783 DOI: 10.1021/cr000075l] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joan Mason
- Departments of Chemistry, Cambridge University, University of Surrey, The Open University, U.K
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18
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Auer AA, Gauss J. Triple excitation effects in coupled-cluster calculations of indirect spin–spin coupling constants. J Chem Phys 2001. [DOI: 10.1063/1.1386698] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Patchkovskii S, Autschbach J, Ziegler T. Curing difficult cases in magnetic properties prediction with self-interaction corrected density functional theory. J Chem Phys 2001. [DOI: 10.1063/1.1370527] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Helgaker T, Watson M, Handy NC. Analytical calculation of nuclear magnetic resonance indirect spin–spin coupling constants at the generalized gradient approximation and hybrid levels of density-functional theory. J Chem Phys 2000. [DOI: 10.1063/1.1321296] [Citation(s) in RCA: 307] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sychrovský V, Gräfenstein J, Cremer D. Nuclear magnetic resonance spin–spin coupling constants from coupled perturbed density functional theory. J Chem Phys 2000. [DOI: 10.1063/1.1286806] [Citation(s) in RCA: 283] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Wigglesworth RD, Raynes WT, Kirpekar S, Oddershede J, Sauer SPA. Nuclear spin–spin coupling in the acetylene isotopomers calculated fromab initiocorrelated surfaces for 1J(C, H), 1J(C, C), 2J(C, H), and 3J(H, H). J Chem Phys 2000. [DOI: 10.1063/1.480525] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dransfeld A, Chesnut D. An ab inito study of NMR isotropic shielding bond length derivatives in phosphorus compounds. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00163-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dickson RM, Ziegler T. NMR Spin−Spin Coupling Constants from Density Functional Theory with Slater-Type Basis Functions. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp951930l] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ross M. Dickson
- Department of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Tom Ziegler
- Department of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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Perera SA, Sekino H, Bartlett RJ. Coupled‐cluster calculations of indirect nuclear coupling constants: The importance of non‐Fermi contact contributions. J Chem Phys 1994. [DOI: 10.1063/1.467725] [Citation(s) in RCA: 239] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chesnut DB, Wright DW. Chemical shift bond derivatives for molecules containing first-row atoms. J Comput Chem 1991. [DOI: 10.1002/jcc.540120504] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Theoretical study of the sign of the 1J(15N15N) indirect nuclear spin-spin coupling constant. Chem Phys Lett 1988. [DOI: 10.1016/0009-2614(88)80003-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Geertsen J, Oddershede J, Scuseria GE. Spin–spin coupling constants of CO and N2. J Chem Phys 1987. [DOI: 10.1063/1.453722] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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von Philipsborn W, Müller R. 15N-NMR-Spektroskopie — neue Methoden und ihre Anwendung. Angew Chem Int Ed Engl 1986. [DOI: 10.1002/ange.19860980504] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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