1
|
Fritzsching KJ, Keeler EG, He C, McDermott AE. Scaled recoupling of chemical shift anisotropies at high magnetic fields under MAS with interspersed C-elements. J Chem Phys 2020; 153:104201. [PMID: 32933302 PMCID: PMC9250421 DOI: 10.1063/5.0020682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 08/17/2020] [Indexed: 11/14/2022] Open
Abstract
The power of chemical shift anisotropy (CSA) measurements for probing structure and dynamics of molecules has been long recognized. NMR pulse sequences that allow measurement of CSA values in an indirect dimension of a protein correlation spectrum have been employed for aliphatic groups, but for practical reasons, carbonyl functional groups have been little studied, despite the fact that carbonyls are expected to give particularly varied and informative CSA values. Specifically, the wide spectral widths of carbonyl tensors make their measurements difficult with typically attainable spectrometer settings. We present here an extended family of experiments that enable the recovery of static CSA lineshapes in an indirect dimension of magic angle spinning (MAS) solid-state NMR experiments, except for various real valued scaling factors. The experiment is suitable for uniformly labeled material, at moderate MAS rates (10 kHz-30 kHz) and at higher magnetic fields (ν0H > 600 MHz). Specifically, the experiments are based on pulse sequence elements from a previous commonly used pulse sequence for CSA measurement, recoupling of chemical shift anisotropy (ROCSA), while modification of scaling factors is achieved by interspersing different blocks of C-elements of the same Cnn 1 cycle. Using experimental conditions similar to the parent ROCSA sequence, a CSA scaling factor between 0 and 0.272 can be obtained, thus allowing a useful practical range of possibilities in experimental conditions for measurement of larger CSA values. Using these blocks, it is also possible to make a constant-time CSA recoupling sequence. The effectiveness of this approach, fROCSA, is shown on model compounds 1-13C-Gly, U-13C,15N-l-His, and microcrystalline U-13C,15N-Ubiquitin.
Collapse
Affiliation(s)
| | - Eric G. Keeler
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Chengming He
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Ann E. McDermott
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| |
Collapse
|
2
|
Tsipis AC. Building trans-philicity (trans-effect/trans-influence) ladders for octahedral complexes by using an NMR probe. Dalton Trans 2019; 48:1814-1822. [DOI: 10.1039/c8dt04562c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An NMR trans-philicity ladder was built for octahedral [Cr(CO)5L]−/0/+ complexes employing a 13C NMR probe and quantified by Δσ13C NMR descriptors.
Collapse
Affiliation(s)
- A. C. Tsipis
- Laboratory of Inorganic and General Chemistry
- University of Ioannina
- 45110 Ioannina
- Greece
| |
Collapse
|
3
|
Foppa L, Yamamoto K, Liao WC, Comas-Vives A, Copéret C. Electronic Structure-Reactivity Relationship on Ruthenium Step-Edge Sites from Carbonyl 13C Chemical Shift Analysis. J Phys Chem Lett 2018; 9:3348-3353. [PMID: 29851348 DOI: 10.1021/acs.jpclett.8b01332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ru nanoparticles are highly active catalysts for the Fischer-Tropsch and the Haber-Bosch processes. They show various types of surface sites upon CO adsorption according to NMR spectroscopy. Compared to terminal and bridging η1 adsorption modes on terraces or edges, little is known about side-on η2 CO species coordinated to B5 or B6 step-edges, the proposed active sites for CO and N2 cleavage. By using solid-state NMR and DFT calculations, we analyze 13C chemical shift tensors (CSTs) of carbonyl ligands on the molecular cluster model for Ru nanoparticles, Ru6(η2-μ4-CO)2(CO)13(η6-C6Me6), and show that, contrary to η1 carbonyls, the CST principal components parallel to the C-O bond are extremely deshielded in the η2 species due to the population of the C-O π* antibonding orbital, which weakens the bond prior to dissociation. The carbonyl CST is thus an indicator of the reactivity of both Ru clusters and Ru nanoparticles step-edge sites toward C-O bond cleavage.
Collapse
Affiliation(s)
- Lucas Foppa
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Keishi Yamamoto
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Wei-Chih Liao
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1-5 , CH-8093 Zürich , Switzerland
| |
Collapse
|
4
|
McCrea-Hendrick ML, Caputo CA, Roberts CJ, Fettinger JC, Tuononen HM, Power PP. Reactions of Terphenyl-Substituted Digallene AriPr4GaGaAriPr4 (AriPr4 = C6H3-2,6-(C6H3-2,6-iPr2)2) with Transition Metal Carbonyls and Theoretical Investigation of the Mechanism of Addition. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00992] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Madison L. McCrea-Hendrick
- Department
of Chemistry, The University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Christine A. Caputo
- Department
of Chemistry, The University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Christopher J. Roberts
- Department
of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box
35, Jyväskylä FI-40014, Finland
| | - James C. Fettinger
- Department
of Chemistry, The University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Heikki M. Tuononen
- Department
of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box
35, Jyväskylä FI-40014, Finland
| | - Philip P. Power
- Department
of Chemistry, The University of California Davis, 1 Shields Avenue, Davis, California 95616, United States
| |
Collapse
|
5
|
Kalz KF, Kindermann N, Xiang SQ, Kronz A, Lange A, Meyer F. Revisiting the Synthesis and Elucidating the Structure of Potassium Cyclopentadienyldicarbonylruthenate, K[CpRu(CO)2]. Organometallics 2014. [DOI: 10.1021/om500107j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kai F. Kalz
- Institute of Inorganic Chemistry, Georg-August-University Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Nicole Kindermann
- Institute of Inorganic Chemistry, Georg-August-University Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Sheng-Qi Xiang
- Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077 Göttingen, Germany
| | - Andreas Kronz
- Geowissenschaftliches Zentrum, Georg-August-University Göttingen, Goldschmidtstrasse 1, D-37077 Göttingen, Germany
| | - Adam Lange
- Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077 Göttingen, Germany
| | - Franc Meyer
- Institute of Inorganic Chemistry, Georg-August-University Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| |
Collapse
|
6
|
Campana CF, Guzei IA, Mednikov EG, Dahl LF. Sixty-Year Saga (1952–2013) of the Solid-State Structure of Triiron Dodecacarbonyl. J CLUST SCI 2013. [DOI: 10.1007/s10876-013-0667-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
7
|
Carbonylation of dimethyl ether on Rh/Cs2HPW12O40: Solid-state NMR study of the mechanism of reaction in the presence of a methyl iodide promoter. J Catal 2012. [DOI: 10.1016/j.jcat.2012.03.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
8
|
Gerothanassis IP. Oxygen-17 NMR spectroscopy: basic principles and applications (part I). PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2010; 56:95-197. [PMID: 20633350 DOI: 10.1016/j.pnmrs.2009.09.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 09/24/2009] [Indexed: 05/29/2023]
Affiliation(s)
- Ioannis P Gerothanassis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina GR-451 10, Greece.
| |
Collapse
|
9
|
Chierotti MR, Gobetto R. Solid-state NMR studies of weak interactions in supramolecular systems. Chem Commun (Camb) 2008:1621-34. [PMID: 18368147 DOI: 10.1039/b711551b] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The field of application of solid-state NMR to the study of supramolecular systems is growing rapidly, with many research groups involved in the development of techniques for the study of crystalline and amorphous phases. This Feature Article aims to provide an overview of the recent contributions of our research group to this field, paying particular attention to the study of the weak interactions such as hydrogen bonds in supramolecular systems through solid-state NMR investigations. The structure and dynamic behaviour of selected host-guest systems will be also discussed.
Collapse
Affiliation(s)
- Michele R Chierotti
- Università degli Studi di Torino, Dipartimento di Chimica I.F.M, Via P. Giuria 7, 10125 Torino, Italy
| | | |
Collapse
|
10
|
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
| | | | | |
Collapse
|
11
|
Nelson JH. Aspects of equivalence as illustrated by phosphine complexes of transition metals. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/cmr.10001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
Van Der Klink J. NMR Spectroscopy as a Probe of Surfaces of Supported Metal Catalysts. ADVANCES IN CATALYSIS 1999. [DOI: 10.1016/s0360-0564(08)60512-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
13
|
Salzmann R, Kaupp M, McMahon MT, Oldfield E. Solid-State Nuclear Magnetic Resonance Spectroscopic and Quantum Chemical Investigation of 13C and 17O Chemical Shift Tensors, 17O Nuclear Quadrupole Coupling Tensors, and Bonding in Transition-Metal Carbonyl Complexes and Clusters. J Am Chem Soc 1998. [DOI: 10.1021/ja973159t] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Renzo Salzmann
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Max Planck Institut für Festkörperforschung, Stuttgart, Germany
| | - Martin Kaupp
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Max Planck Institut für Festkörperforschung, Stuttgart, Germany
| | - Michael T. McMahon
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Max Planck Institut für Festkörperforschung, Stuttgart, Germany
| | - Eric Oldfield
- Contribution from the Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, and Max Planck Institut für Festkörperforschung, Stuttgart, Germany
| |
Collapse
|
14
|
Ehlers AW, Ruiz-Morales Y, Baerends EJ, Ziegler T. Dissociation Energies, Vibrational Frequencies, and 13C NMR Chemical Shifts of the 18-Electron Species [M(CO)6]n (M = Hf−Ir, Mo, Tc, Ru, Cr, Mn, Fe). A Density Functional Study. Inorg Chem 1997. [DOI: 10.1021/ic970223z] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas W. Ehlers
- Afdeling Theoretische Chemie, Faculteit Scheikunde, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Yosadara Ruiz-Morales
- Afdeling Theoretische Chemie, Faculteit Scheikunde, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Evert Jan Baerends
- Afdeling Theoretische Chemie, Faculteit Scheikunde, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Tom Ziegler
- Afdeling Theoretische Chemie, Faculteit Scheikunde, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, and Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4
| |
Collapse
|
15
|
Mechanisms of molecular motion of Mo(CO)6 in zeolites NaY and HY from 13C-NMR lineshapes. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0927-6513(97)00026-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
16
|
Koller H, Overweg AR, van Santen RA, de Haan JW. 13C and 23Na Solid-State NMR Study on Zeolite Y Loaded with Mo(CO)6. J Phys Chem B 1997. [DOI: 10.1021/jp962791q] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hubert Koller
- Laboratories of Inorganic Chemistry and Catalysis and of Instrumental Analysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Arian R. Overweg
- Laboratories of Inorganic Chemistry and Catalysis and of Instrumental Analysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rutger A. van Santen
- Laboratories of Inorganic Chemistry and Catalysis and of Instrumental Analysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jan W. de Haan
- Laboratories of Inorganic Chemistry and Catalysis and of Instrumental Analysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
17
|
Heterogenized catalysts for olefin hydroformylation containing cobalt and palladium-cobalt complexes anchored on phosphinated SiO2:a 13C solid-state NMR study. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/1381-1169(96)00062-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
18
|
Eichele K, Wasylishen RE, Kessler JM, Solujic L, Nelson JH. Phosphorus Chemical Shift Tensors of Phosphole Derivatives Determined by (31)P NMR Spectroscopy of Powder Samples. Inorg Chem 1996; 35:3904-3912. [PMID: 11666582 DOI: 10.1021/ic960095z] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The results of a systematic solid-state (31)P NMR study of 5-phenyldibenzophosphole, DBP, its chalcogenides, and some of its transition metal complexes are reported. Phosphorus chemical shift tensors have been obtained from (31)P NMR spectra of stationary samples and of samples spinning about the magic angle. The spans of the phosphorus chemical shift tensors for DBP and its chalcogenides are comparable to those of the corresponding compounds of triphenylphosphine; however, the asymmetry of the tensors for the DBP series reflects the reduced local symmetry at phosphorus. For the complexes (DBP)M(CO)(5) and cis-(DBP)(2)M(CO)(4), where M is a group 6 transition metal (Cr, Mo, W), the most shielded component of the phosphorus shift tensor is found to be relatively independent of the metal or complex, delta(33) = -41 +/- 8 ppm, and is thought to lie along or close to the P-M bond axis direction. In contrast, delta(11) and delta(22) show considerable variation but decrease systematically on descending the group from Cr to W. Group 10 metal complexes, (DBP)(2)MX(2), have also been investigated, including several trans geometric isomers of nickel, cis and trans isomers of palladium, and cis isomers of platinum. The phosphorus shift tensors are nonaxially symmetric with spans in the range 50 -150 ppm. The phosphorus shift tensors of the two nonequivalent DBP ligands of (DBP)(2)PtX(2) (X = Cl, Br) exhibit quite different principal components. The intermediate component of the shift tensor is thought to lie along the Pt-P bond in these complexes. Some of the complexes exhibit interesting MAS-frequency-dependent (31)P NMR spectra.
Collapse
Affiliation(s)
- Klaus Eichele
- Departments of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J3, and University of Nevada, Reno, Nevada, 89557-0020
| | | | | | | | | |
Collapse
|
19
|
Kaupp M. Analysis of13C and17O Chemical Shift Tensors and an ELF View of Bonding in Fe2(CO)9 and Rh6(CO)16. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/cber.19961290509] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
20
|
Affiliation(s)
- Ian D. Gay
- Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada V5A 1S6
| | - G. Brent Young
- Department of Chemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, U.K
| |
Collapse
|
21
|
Gerothanassis IP, Momenteau M, Barrie PJ, Kalodimos CG, Hawkes GE. 13C CP/MAS NMR Studies of Hemoprotein Models with and without an Axial Hindered Base: (13)C Shielding Tensors and Comparison with Hemoproteins and X-ray Structural Data. Inorg Chem 1996; 35:2674-2679. [PMID: 11666486 DOI: 10.1021/ic950830r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
13C cross-polarization magic-angle-spinning (CP/MAS) NMR spectra of several carbonmonoxide (93-99% (13)C enriched) hemoprotein models with 1,2-dimethylimidazole (1,2-diMeIm) and 1-methylimidazole (1-MeIm) as axial ligands are reported. This enables the (13)CO spinning sideband manifold to be measured and hence the principal components of the (13)CO chemical shift tensor to be obtained. Negative polar interactions in the binding pocket of the cap porphyrin model and inhibition of Fe-->CO back-donation result in a reduction in shielding anisotropy; on the contrary, positive distal polar interactions result in an increase in the shielding anisotropy and asymmetry parameter in some models. It appears that the axial hindered base 1,2-dimethylimidazole has little direct effect on the local geometry at the CO site, despite higher rates of CO desorption being observed for such complexes. This suggests that the mechanism by which steric interactions are released for the 1,2-diMeIm complexes compared to 1-MeIm complexes does not involve a significant increase in bending of the Fe-C-O unit. The asymmetry of the shielding tensor of all the heme model compounds studied is smaller than that found for horse myoglobin and rabbit hemoglobin.
Collapse
Affiliation(s)
- I. P. Gerothanassis
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, Ioannina GR-451 10, Greece, Institut Curie, Section de Recherche, URA 1387 CNRS, Centre Universitaire, 91405 Orsay, France, Department of Chemistry, University College London, 20 Gordon Street, London WC1H OAJ, U.K., and Department of Chemistry, Queen Mary and Westfield College, Mile End Road, London E1 4NS, U.K
| | | | | | | | | |
Collapse
|
22
|
Rao LF, Hwang SJ, King TS, Pruski M. Characterization of CO in Rh6(CO)16/NaY Clusters and Isolated Rh+(CO)2/NaY by Solid-State 13C NMR Spectroscopy. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9536211] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L.-F. Rao
- Ames Laboratory and Department of Chemical Engineering, Iowa State University, Ames, Iowa 50011
| | - S.-J. Hwang
- Ames Laboratory and Department of Chemical Engineering, Iowa State University, Ames, Iowa 50011
| | - T. S. King
- Ames Laboratory and Department of Chemical Engineering, Iowa State University, Ames, Iowa 50011
| | - M. Pruski
- Ames Laboratory and Department of Chemical Engineering, Iowa State University, Ames, Iowa 50011
| |
Collapse
|
23
|
Sironi A. Joint Molecular Mechanics and Atom-Atom Pair Potential Computations on the Solid State Dynamics of [Fe(3)(CO)(12)](1). Inorg Chem 1996; 35:1725-1728. [PMID: 11666400 DOI: 10.1021/ic9500063] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Angelo Sironi
- Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Via Venezian 21, 20133 Milano, Italy
| |
Collapse
|
24
|
Kaupp M. NMR Chemical-Shift Anomaly and Bonding in Piano-Stool Carbonyl and Related Complexes–an Ab Initio ECP/DFT Study. Chemistry 1996. [DOI: 10.1002/chem.19960020317] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
25
|
Ruiz-Morales Y, Schreckenbach G, Ziegler T. Theoretical Study of 13C and 17O NMR Shielding Tensors in Transition Metal Carbonyls Based on Density Functional Theory and Gauge-Including Atomic Orbitals. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952007m] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Georg Schreckenbach
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Tom Ziegler
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| |
Collapse
|
26
|
Kaupp M, Malkin VG, Malkina OL, Salahub DR. Ab Initio ECP/DFT Calculation and Interpretation of Carbon and Oxygen NMR Chemical Shift Tensors in Transition-Metal Carbonyl Complexes. Chemistry 1996. [DOI: 10.1002/chem.19960020108] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
27
|
|
28
|
Braga D, Farrugia L, Grepioni F, Johnson BF. On the molecular structure of [Fe3(CO)12] in the solid state. J Organomet Chem 1994. [DOI: 10.1016/0022-328x(94)87283-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
29
|
|
30
|
Yuan P, Richmond M, Schwartz M. Relaxation mechanisms, bonding, and molecular reorientation in CpRe(CO)3. J Organomet Chem 1992. [DOI: 10.1016/0022-328x(92)80008-l] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
31
|
Groombridge CJ, Larkworthy LF, Marécaux A, Povey DC, Smith GW, Mason J. Synthesis and15N nuclear magnetic resonance shift tensors of bent nitrosyl complexes with N-substituted salicylideneiminate coligands; the shift tensor as a criterion of MNO bond angle. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/dt9920003125] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
32
|
Chemical shift anisotropy of carbon-13 nuclei in carbonyl groups of (η4-norbornadiene)tetracarbonylchromium and metal VIb hexacarbonyls. J Organomet Chem 1991. [DOI: 10.1016/0022-328x(91)80083-v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
33
|
Duncan T. Studies of adsorbate structure and dynamics on catalytic surfaces with NMR spectroscopy: CO on metals. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0166-6622(90)80011-r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
34
|
|
35
|
|
36
|
Variable temperature13C MAS NMR of KFe2Mn(CO)12 in the solid state and as aCatalyst precursor on a carbon support. Catal Letters 1989. [DOI: 10.1007/bf00768184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
37
|
13C solid State MAS NMR spectra of [M3(CO)12] complexes (M = Ru and Os). Evidence for motional effects in [Ru3(CO)12]. Inorganica Chim Acta 1988. [DOI: 10.1016/s0020-1693(00)80601-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
38
|
Haddix GW, Bell AT, Reimer JA. Characterization of CO adsorbed on ?-Mo2N by NMR spectroscopy. Catal Letters 1988. [DOI: 10.1007/bf00766176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
39
|
Shore SE, Ansermet JP, Slichter CP, Sinfelt JH. Nuclear magnetic resonance study of the bonding and diffusion of CO chemisorbed on Pd. PHYSICAL REVIEW LETTERS 1987; 58:953-956. [PMID: 10035081 DOI: 10.1103/physrevlett.58.953] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
40
|
Carbon-13 magic-angle spinning NMR investigation of ‘site effects’ in crystalline Os3(CO)12. Inorganica Chim Acta 1987. [DOI: 10.1016/s0020-1693(00)82109-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
41
|
|
42
|
Wang PK, Ansermet JP, Rudaz SL, Wang Z, Shore S, Slichter CP, Sinfelt JH. NMR Studies of Simple Molecules on Metal Surfaces. Science 1986; 234:35-41. [PMID: 17742632 DOI: 10.1126/science.234.4772.35] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In recent years, improvements in the sensitivity of nuclear magnetic resonance have made it possible to detect progressively smaller numbers of nuclei. Experiments and studies previously thought to be impractical can now be undertaken, for example, the study of phenomena at surfaces. Nuclear magnetic resonance has been applied to study simple molecules (carbon monoxide, acetylene, and ethylene) adsorbed on metal surfaces (ruthenium, rhodium, palladium, osmium, iridium, and platinum). The metals, in the form of clusters 10 to 50 angstroms in diameter, supported on alumina, are typical of real catalysts. The experiments provide information about the bonding of the molecules to the metal, the structures the molecules assume after adsorption, the motion of molecules on the surface, the breakup of molecules induced by heating, and the products of such breakup.
Collapse
|
43
|
Duncan T, Winslow P, Bell A. 13C NMR spectra of carbonaceous deposits on silica-supported ruthenium catalysts. Chem Phys Lett 1983. [DOI: 10.1016/0009-2614(83)87385-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|