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Chojnacka MW, Adjei JA, Lough AJ, Sacripante GG, Gossage RA. Transition metal complexes of monodentate 2-oxazolines containing long chain alkyl groups. The crystal structure of trans-PdCl 2( κ
1- N- rac-2-heptadecyl-4,5-dihydro-5-methyl-2-oxazole) 2. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2020. [DOI: 10.1515/znb-2019-0212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The synthesis, characterisation and properties of several divalent metal complexes (Co, Ni, Pd) containing 2-oxazoline ligands L1–L3, appended with long chain alkyl and/or ester groups, is reported. The X-ray crystal structure aspects of one such complex, trans-PdCl2(rac-2-heptadecyl-4,5-dihydro-5-methyl-2-oxazole)2 (i.e. PdCl2(L1)2: 3), is described. This latter material contains one of the longest alkyl chains to be crystallographically characterised appended to an oxazoline ligand. The complexes reported herein represent the first transition metal derivatives of these high molecular weight, long chain and presumably low polarity monodentate oxazoline ligands. A combination of spectral and theoretical calculations (semi-empirical PM6(tm) level of theory) are used to support the proposed structure in the case of the hydrates of NiCl2 and CoBr2 complexes derived from L1. A trio of PdCl2 complexes of the ligand set are likewise detailed. Complex 3 is shown to be a useful pre-catalyst for the promotion of a Heck coupling reaction between bromobenzene and styrene under typical conditions.
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Affiliation(s)
- Maja W. Chojnacka
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
- Xerox Research Centre of Canada, Ltd. , 2660 Speakman Drive , Mississauga ON L5K 2L1 , Canada
- Department of Chemistry , University of California at Riverside , Riverside CA , USA
| | - Jeanette A. Adjei
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
- Department of Chemistry , Western University , London ON , Canada
| | - Alan J. Lough
- Department of Chemistry , University of Toronto , 80 St. George Street , Toronto ON M5S 3H6 , Canada
| | - Guerino G. Sacripante
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
- Xerox Research Centre of Canada, Ltd. , 2660 Speakman Drive , Mississauga ON L5K 2L1 , Canada
| | - Robert A. Gossage
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
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Adjei JA, Lough AJ, Gossage RA. Synthesis and characterisation of κ 2- N, O-oxazoline-enolate complexes of nickel(ii): explorations in coordination chemistry and metal-mediated polymerisation. RSC Adv 2019; 9:3956-3964. [PMID: 35518104 PMCID: PMC9060527 DOI: 10.1039/c8ra10304f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 01/10/2019] [Indexed: 11/21/2022] Open
Abstract
The synthesis and characterisation (UV-Vis, IR, X-ray diffraction, etc.) of a series of Ni(ii) complexes derived from both known and novel 2-acylmethyl-2-oxazolines (2a-g: i.e., (Z)-1-R-2-(4,4'-dimethyl-2'-oxazolin-2'-yl)eth-1-en-1-ol; R = -Ph, -2-furanyl, -p-NO2-Ph, -t-Bu, -2-thiofuranyl, p-NC-Ph, -CF3) is reported. These Ni materials (3a-g) represent the first group 10 metal complexes of this ligand class. All derivatives reported are paramagnetic (S = 1) compounds of formulae Ni(κ2-N,O-L)2 where L represents an enolate of structure (Z)-1-R-2-(4',4'-dimethyl-2'-oxazolin-2'-yl)eth-1-en-1-ate formed via proton loss from 2. The air- and moisture-stable metal complexes feature a less typical distorted seesaw-shaped disposition of binding atoms around the metal centre for six structurally characterised (X-ray) examples. Preliminary investigations indicate that 3a (R = -Ph) is a useful catalysts for olefin polymerisation in the presence of alkylaluminum reagents.
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Affiliation(s)
- Jeanette A Adjei
- Department of Chemistry & Biology, Ryerson University 350 Victoria Street Toronto ON M5B 2K3 Canada
| | - Alan J Lough
- Department of Chemistry, University of Toronto 80 St. George Street Toronto ON M5S 3H6 Canada
| | - Robert A Gossage
- Department of Chemistry & Biology, Ryerson University 350 Victoria Street Toronto ON M5B 2K3 Canada
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Amido-pincer complexes of Cu(II): Synthesis, coordination chemistry and applications in catalysis. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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The crystal structure of diaqua-(N-(2-hydroxy-5-nitrobenzyl)iminodiacetato-κ4-N,O,O′,O′′)chromium(III) based on synchrotron data, C11H13CrN2O9. Z KRIST-NEW CRYST ST 2016. [DOI: 10.1515/ncrs-2016-0045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractC11H13CrN2O9, orthorhombic, Pbca (no. 61), a = 6.7740(14) Å, b = 12.309(3) Å, c = 32.776(7) Å, V = 2732.9(10) Å3, Z = 8, Rgt(F) = 0.0302, wRref(F2) = 0.0867, T = 100(2) K.
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Mukhina OA, Kutateladze AG. Oxazolines as Dual-Function Traceless Chromophores and Chiral Auxiliaries: Enantioselective Photoassisted Synthesis of Polyheterocyclic Ketones. J Am Chem Soc 2016; 138:2110-3. [PMID: 26866604 PMCID: PMC5578731 DOI: 10.1021/jacs.5b12690] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
2-(o-Amidophenyl)oxa- and -thiazolines undergo excited-state intramolecular proton transfer (ESIPT), generating aza-o-xylylenes capable of intramolecular [4+2] and [4+4] cycloadditions with tethered unsaturated pendants. Facile hydrolysis of the primary photoproducts, spiro-oxazolidines and thiazolidines, under mild conditions unmasks a phenone functionality. Variations in linkers allow for access to diverse core scaffolds in the primary photoproducts, rendering the approach compatible with the philosophy of diversity-oriented synthesis. Chiral oxazolines, readily available from the corresponding amino alcohols, yield enantioenriched keto-polyheterocycles of complex topologies with enantiomeric excess values up to 90%.
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Affiliation(s)
- Olga A. Mukhina
- Department of Chemistry and Biochemistry, University of Denver, 2190 E. Iliff Ave. Denver, CO 80208-2436 (USA)
| | - Andrei G. Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, 2190 E. Iliff Ave. Denver, CO 80208-2436 (USA)
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Modern Organometallic Multidentate Ligand Design Strategies: The Birth of the Privileged “Pincer” Ligand Platform. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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7
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Zabierowski P, Matoga D, Nitek W. Cobalt(ii) and copper(ii) supramolecular networks with a 1-iminoisoindoline asymmetric pincer. RSC Adv 2015. [DOI: 10.1039/c5ra02063h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The first synthesis and characterization of cobalt(ii) and copper(ii) complexes with an in situ prepared novel asymmetric trinitrogen isoindoline-based pincer type ligand, N-(2-picolyl)isoindoline-1-(2-picolyl)imine (pap), are reported.
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Affiliation(s)
| | - Dariusz Matoga
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków
- Poland
| | - Wojciech Nitek
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Kraków
- Poland
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Jia WG, Li DD, Yan LQ, Sheng EH, Dai YC. Preparation, structures, and properties of nickel complexes containing 2,6-bis[4′,4′-dimethyloxazolin-2′-yl]pyridine, a pincer ligand. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.886109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Wei-Guo Jia
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - Dan-Dan Li
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - Li-Qin Yan
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - En-Hong Sheng
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
| | - Yuan-Chen Dai
- College of Chemistry and Materials Science, Center for Nano Science and Technology, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, China
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Feng S, Ma L, Feng G, Jiao Y, Zhu M. Dinuclear copper(II) complexes hold by crab-shaped pincer ligands: Syntheses, structures, luminescent and magnetic properties. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.11.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Bezuidenhout DI, Kleinhans G, Guisado-Barrios G, Liles DC, Ung G, Bertrand G. Isolation of a potassium bis(1,2,3-triazol-5-ylidene)carbazolide: a stabilizing pincer ligand for reactive late transition metal complexes. Chem Commun (Camb) 2014; 50:2431-3. [PMID: 24448261 DOI: 10.1039/c3cc49385g] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and X-ray crystal structure of a potassium adduct of a monoanionic CNC-pincer ligand featuring two mesoionic carbenes is reported. Owing to the peculiar electronic and steric properties of this ligand, the first neutral stable Ni(II)-hydride, and an unusual Cu(II) complex displaying a seesaw geometry, have been isolated.
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Affiliation(s)
- Daniela I Bezuidenhout
- Chemistry Department, University of Pretoria, Private Bag X20, Hatfield 0028, Pretoria, South Africa.
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The Monoanionic ECE-Pincer Ligand: A Versatile Privileged Ligand Platform—General Considerations. TOP ORGANOMETAL CHEM 2013. [DOI: 10.1007/978-3-642-31081-2_1] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Chen T, He LP, Gong D, Yang L, Miao X, Eppinger J, Huang KW. Ruthenium(II) pincer complexes with oxazoline arms for efficient transfer hydrogenation reactions. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.041] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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He LP, Chen T, Xue DX, Eddaoudi M, Huang KW. Efficient transfer hydrogenation reaction Catalyzed by a dearomatized PN3P ruthenium pincer complex under base-free Conditions. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2011.10.017] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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The Crystal and Molecular Structure of (2Z)-2-[3-(4-Methoxybenzoyl)-4,4-dimethyl-1,2-oxazolidin-2-ylidene]-1-(4-methoxyphenyl)ethanone. CRYSTALS 2011. [DOI: 10.3390/cryst1040229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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