1
|
Qin J, Li F, Qiu R, Chen L, Luo L, Wang M, Pu Z, Shuai M. Insights into the Metal-CO Bond in O 2M(η 1-CO) (M = Cr, Mo, W, Nd, and U) Complexes. Inorg Chem 2022; 61:2066-2075. [PMID: 35037755 DOI: 10.1021/acs.inorgchem.1c03257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Investigations on the structures and bonding properties of metal carbonyl compounds provide fundamental understandings on the origin of small-molecule activations. Herein, the geometry and bonding trends of a series of isovalent metal oxocarbonyl complexes O2M(η1-CO) (M = Cr, Mo, W, Nd, and U) were studied by combined matrix-isolation infrared spectroscopy and advanced quantum chemical calculations. The title complexes present red shift of C-O stretching bands in the range from 122 to 244 cm-1, indicating the difference of CO activation ability for the series of isovalent metal dioxides. Density functional theory calculations predict T-shaped structures with a C2v symmetry for all the title molecules. O2Nd(η1-CO) bears little resemblance to the other complexes in bonding characters because of the weak interactions between the NdO2 and CO moiety. For the other complexes, natural localized molecular orbital analysis reveals a gradual increase of covalent character in M-CO bonds along the metal series Cr → Mo → W→ U. Energy decomposition analysis with natural orbitals for chemical valence calculations demonstrates that the M-CO bonding patterns conform to the conventional Dewar-Chatt-Duncanson motif. The contributions from orbital interactions in total attractions increase from Cr (41.7%) to U (52.7%). The breakdown of the orbital term into pairwise interactions shows that contributions of the M ← CO σ donation decrease from Cr (59.2%) to U (28.4%), while the M → CO π* backdonation increases significantly from Cr (23.8%) to U (67.3%). The more effective overlap and the better energy matching of U 5f and U 6d valence orbitals with CO π* orbitals result in much stronger U → CO π backdonation than the other metal elements.
Collapse
Affiliation(s)
- Jianwei Qin
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China.,Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou, Sichuan 621908, P. R. China
| | - Fang Li
- School of Material Science and Engineering, Southwest University of Science and Technology, 59 Middle Section of Qinglong Road, Mianyang 621010, P.R. China
| | - Ruizhi Qiu
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Liang Chen
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou, Sichuan 621908, P. R. China
| | - Lizhu Luo
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Min Wang
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China
| | - Zhen Pu
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou, Sichuan 621908, P. R. China
| | - Maobing Shuai
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou, Sichuan 621908, P. R. China
| |
Collapse
|
2
|
Pu Z, Qin J, Ao B, Dong H, Shuai M, Li F. Intermediates of Carbon Monoxide Oxidation on Praseodymium Monoxide Molecules: Insights from Matrix-Isolation IR Spectroscopy and Quantum-Chemical Calculations. Inorg Chem 2021; 60:7660-7669. [PMID: 34018728 DOI: 10.1021/acs.inorgchem.0c03607] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Identifying reaction intermediates in gas-phase investigations will provide understanding for the related catalysts in fundamental aspects including bonding interactions of the reaction species, oxidation states (OSs) of the anchored atoms, and reaction mechanisms. Herein, carbon monoxide (CO) oxidation by praseodymium monoxide (PrO) molecules has been investigated as a model reaction in solid argon using matrix-isolation IR spectroscopy and quantum-chemical calculations. Two reaction intermediates, OPr(η1-CO) and OPr(η2-CO), have been trapped and characterized in argon matrixes. The intermediate OPr(η2-CO) shows an extremely low C-O stretching band at 1624.5 cm-1. Quantum-chemistry studies indicate that the bonding in OPr(η1-CO) is described as "donor-acceptor" interactions conforming to the Dewar-Chatt-Duncanson motif. However, the bonding in OPr(η2-CO) results evidently from a combination of dominant ionic forces and normal Lewis "acid-base" interactions. The electron density of the singly occupied bonding orbital is strongly polarized to the CO fragment in OPr(η2-CO). Electronic structure analysis suggests that the two captured species exhibit Pr(III) OSs. Besides, the pathways of CO oxidation have been discussed.
Collapse
Affiliation(s)
- Zhen Pu
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China
| | - Jianwei Qin
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, Sichuan, China
| | - Bingyun Ao
- Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, Sichuan, China
| | - Haopeng Dong
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China
| | - Maobing Shuai
- Institute of Materials, China Academy of Engineering Physics, Mailbox No. 9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China
| | - Fang Li
- School of Material Science and Engineering, Southwest University of Science and Technology, 59 Middle Section of Qinglong Road, Mianyang 621010, Sichuan, P.R. China
| |
Collapse
|
4
|
Collings MP, Dever JW, McCoustra MRS. The interaction of carbon monoxide with model astrophysical surfaces. Phys Chem Chem Phys 2014; 16:3479-92. [DOI: 10.1039/c3cp54024c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Huber SM, Heinemann FW, Audebert P, Weiss R. 4,5-Bis(dialkylamino)-Substituted Imidazolium Systems: Facile Access to N-Heterocyclic Carbenes with Self-Umpolung Option. Chemistry 2011; 17:13078-86. [DOI: 10.1002/chem.201101999] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
6
|
Giuliano BM, Reva I, Fausto R. Infrared Spectra and Photochemistry of Matrix-Isolated Pyrrole-2-carbaldehyde. J Phys Chem A 2010; 114:2506-17. [DOI: 10.1021/jp911118v] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Igor Reva
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Rui Fausto
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| |
Collapse
|
7
|
Fajardo ME, Lindsay CM, Momose T. Crystal field theory analysis of rovibrational spectra of carbon monoxide monomers isolated in solid parahydrogen. J Chem Phys 2009; 130:244508. [DOI: 10.1063/1.3158947] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
8
|
Huber SM, Hennig A, Pühlhofer FG, Weiss R. From DMF to isatine: A novel and general one-pot synthesis of isatine and its N-unsubstituted derivatives vianucleophilic substitution reactions on 1,2-bis(dimethylamino)-1,2-dichloro-ethene. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
9
|
Weiss R, Huber SM, Heinemann FW, Audebert P, Pühlhofer FG. Structure, Stereoelectronics, and Synthetic Potential of 1,2-Bisonio-1,2-bis(dialkylamino)ethenes. Angew Chem Int Ed Engl 2006; 45:8059-62. [PMID: 17089438 DOI: 10.1002/anie.200602693] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Robert Weiss
- Institut für Organische Chemie, Henkestrasse 42, 91054 Erlangen, Germany.
| | | | | | | | | |
Collapse
|
10
|
Weiss R, Huber SM, Heinemann FW, Audebert P, Pühlhofer FG. Struktur, Stereoelektronik und Synthesepotenzial von 1,2-Bisonio-1,2-bis(dialkylamino)ethenen. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602693] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|