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Watson BT, Vanga M, Noonikara-Poyil A, Muñoz-Castro A, Dias HVR. Copper(I), Silver(I), and Gold(I) Ethylene Complexes of Fluorinated and Boron-Methylated Bis- and Tris(pyridyl)borate Chelators. Inorg Chem 2023; 62:1636-1648. [PMID: 36657123 DOI: 10.1021/acs.inorgchem.2c04009] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Bis- and tris-pyridyl borate ligands containing pyridyl donor arms, a methylated boron cap, and a fluorine-lined coordination pocket have been prepared and utilized in coinage metal chemistry. The tris(pyridyl)borate ligand has been synthesized using a convenient boron source, [NBu4][MeBF3]. These N-based ligands permitted the isolation of group 11 metal-ethylene complexes [MeB(6-(CF3)Py)3]M(C2H4) and [Me2B(6-(CF3)Py)2]M(C2H4) (M = Cu, Ag, Au). The gold complexes display the largest coordination-induced upfield shifts of the ethylene 13C resonance relative to that of the free ethylene in their NMR spectra, while the silver complexes show the smallest shift. Solid-state structures of five of these metal-ethylene complexes as well as the related free ligands were established by X-ray crystallography. Surprisingly, all three [MeB(6-(CF3)Py)3]M(C2H4) adopt the rare κ2 coordination mode rather than the typical κ3 coordination mode of facial capping tridentate ligands. Computational analyses indicate that κ2 coordination mode is favored over the κ3-mode in these coinage metal-ethylene complexes and point to the effects CF3-substituents have on κ2/κ3-energy difference. The M-C and M-N bond distances of [MeB(6-(CF3)Py)3]M(C2H4) follow the trend expected based on covalent radii of M(I) ions. The calculated ethylene-M interaction energy of κ2-[MeB(6-(CF3)Py)3]M(C2H4) indicated that the gold(I) forms the strongest interaction with ethylene. A comparison to the related poly(pyrazolyl)borates is also presented.
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Affiliation(s)
- Brandon T Watson
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Mukundam Vanga
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Alvaro Muñoz-Castro
- Facultad de Ingeniería, Arquitectura y Diseño, Universidad San Sebastián, Bellavista 7, Santiago 8420524, Chile
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
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Belkhiria M, Mechria A, Dridi S, Cruz TF, Gomes CS, Gomes PT, Msaddek M. Cationic allylnickel(II) complexes bearing labile N,S-donor ligands: Synthesis, characterization and crystal structure. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.06.075] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Li H, Yuan W, Zou L, Wang X, Zhan H, Cheng Y. Synthesis, characterization and photophysical properties of homoleptic platinum(II) complexes with 2,2′-biimidazole-based ligands. TRANSIT METAL CHEM 2018. [DOI: 10.1007/s11243-018-0209-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pennington-Boggio MK, Conley BL, Richmond MG, Williams TJ. Synthesis, Structure, and Conformational Dynamics of Rhodium and Iridium Complexes of Dimethylbis(2-pyridyl)borate. Polyhedron 2014; 84:24-31. [PMID: 25435645 DOI: 10.1016/j.poly.2014.05.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Rhodium(I) and Iridium(I) borate complexes of the structure [Me2B(2-py)2]ML2 (L2 = (tBuNC)2, (CO)2, (C2H4)2, cod, dppe) were prepared and structurally characterized (cod = 1,5-cyclooctadiene; dppe = 1,2-diphenylphosphinoethane). Each contains a boat-configured chelate ring that participates in a boat-to-boat ring flip. Computational evidence shows that the ring flip proceeds through a transition state that is near planarity about the chelate ring. We observe an empirical, quantitative correlation between the barrier of this ring flip and the π acceptor ability of the ancillary ligand groups on the metal. The ring flip barrier correlates weakly to the Tolman and Lever ligand parameterization schemes, apparently because these combine both σ and π effects while we propose that the ring flip barrier is dominated by π bonding. This observation is consistent with metal-ligand π interactions becoming temporarily available only in the near-planar transition state of the chelate ring flip and not the boat-configured ground state. Thus, this is a first-of-class observation of metal-ligand π bonding governing conformational dynamics.
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Affiliation(s)
- Megan K Pennington-Boggio
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Brian L Conley
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Michael G Richmond
- Department of Chemistry, University of North Texas, Denton, Texas 76203,
| | - Travis J Williams
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
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Carpenter AE, McNeece AJ, Barnett BR, Estrada AL, Mokhtarzadeh CC, Moore CE, Rheingold AL, Perrin CL, Figueroa JS. Direct Observation of β-Chloride Elimination from an Isolable β-Chloroalkyl Complex of Square-Planar Nickel. J Am Chem Soc 2014; 136:15481-4. [DOI: 10.1021/ja508956q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alex E. Carpenter
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Andrew J. McNeece
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Brandon R. Barnett
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Alexander L. Estrada
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Charles C. Mokhtarzadeh
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Curtis E. Moore
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Arnold L. Rheingold
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Charles L. Perrin
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Joshua S. Figueroa
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
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Sawatlon B, Wititsuwannakul T, Tantirungrotechai Y, Surawatanawong P. Mechanism of Ni N-heterocyclic carbene catalyst for C–O bond hydrogenolysis of diphenyl ether: a density functional study. Dalton Trans 2014; 43:18123-33. [DOI: 10.1039/c4dt02374a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Ni(SIPr)(η2-PhOPh) is the key active species for C–O bond hydrogenolysis of diphenyl ether.
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Affiliation(s)
- Boodsarin Sawatlon
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400, Thailand
| | - Taveechai Wititsuwannakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400, Thailand
| | - Yuthana Tantirungrotechai
- Department of Chemistry
- Faculty of Science and Technology
- Thammasat University
- Pathum Thani 12120, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400, Thailand
- Center for Alternative Energy
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