1
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Walker AN, Ayala MA, Mondal S, Bergagnini MC, Bui PJD, Chidester SN, Doeden CI, Esjornson L, Sweany BR, Garcia L, Krause JA, Oliver AG, Prior TJ, Hubin TJ. A Bridge too Far? Comparison of Transition Metal Complexes of Dibenzyltetraazamacrocycles with and without Ethylene Cross-Bridges: X-ray Crystal Structures, Kinetic Stability, and Electronic Properties. Molecules 2023; 28:895. [PMID: 36677952 PMCID: PMC9863842 DOI: 10.3390/molecules28020895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/18/2023] Open
Abstract
Tetraazamacrocycles, cyclic molecules with four nitrogen atoms, have long been known to produce highly stable transition metal complexes. Cross-bridging such molecules with two-carbon chains has been shown to enhance the stability of these complexes even further. This provides enough stability to use the resulting compounds in applications as diverse and demanding as aqueous, green oxidation catalysis all the way to drug molecules injected into humans. Although the stability of these compounds is believed to result from the increased rigidity and topological complexity imparted by the cross-bridge, there is insufficient experimental data to exclude other causes. In this study, standard organic and inorganic synthetic methods were used to produce unbridged dibenzyl tetraazamacrocycle complexes of Co, Ni, Cu, and Zn that are analogues of known cross-bridged tetraazamacrocycles and their transition metal complexes to allow direct comparison of molecules that are identical except for the cross-bridge. The syntheses of the known tetraazamacrocycles and the new transition metal complexes were successful with high yields and purity. Initial chemical characterization of the complexes was conducted by UV-Visible spectroscopy, while cyclic voltammetry showed more marked differences in electronic properties from bridged versions. Direct comparison studies of the unbridged and bridged compounds' kinetic stabilities, as demonstrated by decomposition using high acid concentration and elevated temperature, showed that the cyclen-based complex stability did not benefit from cross-bridging. This is likely due to poor complementarity with the Cu2+ ion while cyclam-based complexes benefited greatly. We conclude that ligand-metal complementarity must be maintained in order for the topological and rigidity constraints imparted by the cross-bridge to contribute significantly to complex robustness.
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Affiliation(s)
- Ashlie N. Walker
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Megan A. Ayala
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Somrita Mondal
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Mackenzie C. Bergagnini
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Phuong John D. Bui
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Stephanie N. Chidester
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Chad I. Doeden
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Louise Esjornson
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Brian R. Sweany
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Leslie Garcia
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, Cincinnati, OH 45220, USA
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Timothy J. Prior
- Department of Chemistry, School of Natural Sciences, University of Hull, Kingston Upon Hull HU6 7RX, UK
| | - Timothy J. Hubin
- Department of Chemistry and Physics, Southwestern Oklahoma State University, Weatherford, OK 73096, USA
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2
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Petroselli M, Chen YQ, Zhao MK, Rebek J, Yu Y. C-H X-C bonds in alkyl halides drive reverse selectivities in confined spaces. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Zhang M, Liang G, Xing M. Theoretical Investigation of Hydrogen‐Bond‐Assisted Tetradentate N4 Copper(I) Chloride and
trans
‐1,2‐Peroxodicopper Complexes. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Min Zhang
- Department of Chemistry Mississippi State University Mississippi State Mississippi 39762 United States
| | - Guangchao Liang
- Department of Chemistry University of Michigan Ann Arbor Michigan 48109 United States
| | - Mengjiang Xing
- State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 P. R. China
- Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Huzhou 313001 P. R. China
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4
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Bhattacharya S, Basu U, Haouas M, Su P, Espenship MF, Wang F, Solé‐Daura A, Taffa DH, Wark M, Poblet JM, Laskin J, Cadot E, Kortz U. Discovery and Supramolecular Interactions of Neutral Palladium-Oxo Clusters Pd 16 and Pd 24. Angew Chem Int Ed Engl 2021; 60:3632-3639. [PMID: 33104280 PMCID: PMC7898824 DOI: 10.1002/anie.202010690] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/23/2020] [Indexed: 01/27/2023]
Abstract
We report on the synthesis, structure, and physicochemical characterization of the first three examples of neutral palladium-oxo clusters (POCs). The 16-palladium(II)-oxo cluster [Pd16 O24 (OH)8 ((CH3 )2 As)8 ] (Pd16 ) comprises a cyclic palladium-oxo unit capped by eight dimethylarsinate groups. The chloro-derivative [Pd16 Na2 O26 (OH)3 Cl3 ((CH3 )2 As)8 ] (Pd16 Cl) was also prepared, which forms a highly stable 3D supramolecular lattice via strong intermolecular interactions. The 24-palladium(II)-oxo cluster [Pd24 O44 (OH)8 ((CH3 )2 As)16 ] (Pd24 ) can be considered as a bicapped derivative of Pd16 with a tetra-palladium-oxo unit grafted on either side. The three compounds were fully characterized 1) in the solid state by single-crystal and powder XRD, IR, TGA, and solid-state 1 H and 13 C NMR spectroscopy, 2) in solution by 1 H, 13 C NMR and 1 H DOSY spectroscopic methods, and 3) in the gas phase by electrospray ionization mass spectrometry (ESI-MS).
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Affiliation(s)
- Saurav Bhattacharya
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
| | - Uttara Basu
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
| | - Mohamed Haouas
- Institut Lavoisier de VersaillesCNRS, UVSQUniversité Paris-SaclayVersaillesFrance
| | - Pei Su
- Department of ChemistryPurdue University560 Oval DriveWest LafayetteIN47907USA
| | | | - Fei Wang
- Departament de Química Física i InorgànicaUniversitat Rovira i Virgili, Marcel lí Domingo 143007TarragonaSpain
| | - Albert Solé‐Daura
- Departament de Química Física i InorgànicaUniversitat Rovira i Virgili, Marcel lí Domingo 143007TarragonaSpain
| | - Dereje H. Taffa
- Institute of ChemistryCarl von Ossietzky University Oldenburg26129OldenburgGermany
| | - Michael Wark
- Institute of ChemistryCarl von Ossietzky University Oldenburg26129OldenburgGermany
| | - Josep M. Poblet
- Departament de Química Física i InorgànicaUniversitat Rovira i Virgili, Marcel lí Domingo 143007TarragonaSpain
| | - Julia Laskin
- Department of ChemistryPurdue University560 Oval DriveWest LafayetteIN47907USA
| | - Emmanuel Cadot
- Institut Lavoisier de VersaillesCNRS, UVSQUniversité Paris-SaclayVersaillesFrance
| | - Ulrich Kortz
- Department of Life Sciences and ChemistryJacobs UniversityCampus Ring 128759BremenGermany
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5
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Bhattacharya S, Basu U, Haouas M, Su P, Espenship MF, Wang F, Solé‐Daura A, Taffa DH, Wark M, Poblet JM, Laskin J, Cadot E, Kortz U. Discovery and Supramolecular Interactions of Neutral Palladium‐Oxo Clusters Pd
16
and Pd
24. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010690] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Saurav Bhattacharya
- Department of Life Sciences and Chemistry Jacobs University Campus Ring 1 28759 Bremen Germany
| | - Uttara Basu
- Department of Life Sciences and Chemistry Jacobs University Campus Ring 1 28759 Bremen Germany
| | - Mohamed Haouas
- Institut Lavoisier de Versailles CNRS, UVSQ Université Paris-Saclay Versailles France
| | - Pei Su
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
| | | | - Fei Wang
- Departament de Química Física i Inorgànica Universitat Rovira i Virgili, Marcel lí Domingo 1 43007 Tarragona Spain
| | - Albert Solé‐Daura
- Departament de Química Física i Inorgànica Universitat Rovira i Virgili, Marcel lí Domingo 1 43007 Tarragona Spain
| | - Dereje H. Taffa
- Institute of Chemistry Carl von Ossietzky University Oldenburg 26129 Oldenburg Germany
| | - Michael Wark
- Institute of Chemistry Carl von Ossietzky University Oldenburg 26129 Oldenburg Germany
| | - Josep M. Poblet
- Departament de Química Física i Inorgànica Universitat Rovira i Virgili, Marcel lí Domingo 1 43007 Tarragona Spain
| | - Julia Laskin
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles CNRS, UVSQ Université Paris-Saclay Versailles France
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry Jacobs University Campus Ring 1 28759 Bremen Germany
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6
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Zhang S, Wang Z, Cao Q, Yue E, Liu Q, Ma Y, Liang T, Sun WH. Aza-crown compounds synthesised by the self-condensation of 2-amino-benzyl alcohol over a pincer ruthenium catalyst and applied in the transfer hydrogenation of ketones. Dalton Trans 2020; 49:15821-15827. [PMID: 33151229 DOI: 10.1039/d0dt03257c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A well-defined PNN-Ru catalyst was revisited to self-condense 2-aminobenzyl alcohol in forming a series of novel aza-crown compounds [aza-12-crown-3 (1), aza-16-crown-4 (2) and aza-20-crown-5 (3)]. All aza-crown compounds are separated and determined by NMR, IR, and ESI-MS spectroscopy as well as X-ray crystallography, indicating the saddle structure of 1 and the twisted 1,3-alternate conformation structure of 3. These aza-crown compounds have been explored to study ferric initiation of transfer hydrogenation (TH) of ketones into their corresponding secondary alcohols in the presence of 2-propanol with a basic t-BuOK solution, achieving a high conversion (up to 95%) by a ferric complex with 2 in a low loading (0.05 mol%).
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Affiliation(s)
- Shanshan Zhang
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China.
| | - Zheng Wang
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China. and Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Qianrong Cao
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China. and Hebei Research Institute of Microbiology, Baoding 071051, China
| | - Erlin Yue
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Qingbin Liu
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China.
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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7
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Cho J, Jeong JH, Shin HJ, Min KS. Synthesis, structure and photoluminescence properties of naphthalene-based chiral zinc(II) complexes. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Kim S, Park IH, Choi HB, Ju H, Lee E, Herng TS, Ding J, Jung JH, Lee SS. Formation of a four-bladed waterwheel-type chloro-bridged dicopper(ii) complex with dithiamacrocycle via double exo-coordination. Dalton Trans 2020; 49:1365-1369. [DOI: 10.1039/c9dt04372a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A four-bladed waterwheel-like chloro-bridged dicopper(ii) complex! The self-assembly of O3S2-macrocycle (L) with copper(ii) nitrate afforded a chloro-bridged tetra(macrocycle) dicopper(ii) complex.
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Affiliation(s)
- Seulgi Kim
- Department of Chemistry and Research Institute of Natural Science
- Gyeongsang National University
- Jinju 52828
- South Korea
| | - In-Hyeok Park
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - Han-Byeol Choi
- Department of Chemistry and Research Institute of Natural Science
- Gyeongsang National University
- Jinju 52828
- South Korea
| | - Huiyeong Ju
- Department of Chemistry and Research Institute of Natural Science
- Gyeongsang National University
- Jinju 52828
- South Korea
| | - Eunji Lee
- Department of Chemistry and Research Institute of Natural Science
- Gyeongsang National University
- Jinju 52828
- South Korea
| | - Tun Seng Herng
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
- Department of Materials Science and Engineering
| | - Jun Ding
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 119260
- Singapore
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of Natural Science
- Gyeongsang National University
- Jinju 52828
- South Korea
| | - Shim Sung Lee
- Department of Chemistry and Research Institute of Natural Science
- Gyeongsang National University
- Jinju 52828
- South Korea
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9
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Morrow TJ, Christman WE, Williams JZ, Arulsamy N, Goroncy A, Hulley EB. Ligand dynamics and protonation preferences of Rh and Ir complexes bearing an almost, but not quite, pendent base. Dalton Trans 2018; 47:2670-2682. [DOI: 10.1039/c7dt04259k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pendent nucleophiles can assist transition metals mediate bond rearrangements (e.g. as proton acceptors), but can also act as inhibitory hemilabile ligands. This dual nature has been studied in a series of rhodium and iridium complexes that exhibit disparate nucleophile binding ability in the ground state and in protonation reactions.
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Affiliation(s)
- T. J. Morrow
- Department of Chemistry
- University of Wyoming
- Laramie
- USA
| | | | | | - N. Arulsamy
- Department of Chemistry
- University of Wyoming
- Laramie
- USA
| | - A. Goroncy
- Department of Chemistry
- University of Wyoming
- Laramie
- USA
| | - E. B. Hulley
- Department of Chemistry
- University of Wyoming
- Laramie
- USA
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