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Camp AM, Kita MR, Grajeda J, White PS, Dickie DA, Miller AJM. Mapping the Binding Modes of Hemilabile Pincer-Crown Ether Ligands in Solution Using Diamagnetic Anisotropic Effects on NMR Chemical Shift. Inorg Chem 2017; 56:11141-11150. [PMID: 28872310 DOI: 10.1021/acs.inorgchem.7b01485] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A protocol for identifying ligand binding modes in a series of iridium pincer complexes bearing hemilabile aza-crown ether ligands has been developed using readily accessible NMR methods. The approach was tested on a collection of 13 structurally diverse pincer-crown ether complexes that include several newly characterized species. New synthetic routes enable facile interconversion of coordination modes and supporting ligands. Detailed structural assignments of five complexes reveal that the difference in chemical shift (Δδ) between geminal protons in the crown ether is influenced by diamagnetic anisotropy arising from halides and other ligands in the primary coordination sphere. The average difference in chemical shift between diastereotopic geminal protons in the crown ether macrocycle (Δδavg), as determined through a single 1H-13C HSQC experiment, provides information on the pincer ligand binding mode by establishing whether the macrocycle is in close proximity to the metal center. The Δδavg values for binding modes that involve chelating ether(s) bound to iridium are roughly 2-fold larger than those for tridentate complexes with no Ir-O bonds.
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Affiliation(s)
- Andrew M Camp
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Matthew R Kita
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Javier Grajeda
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Peter S White
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Diane A Dickie
- Department of Chemistry, Brandeis University , 415 South Street, Waltham, Massachusetts 02453, United States
| | - Alexander J M Miller
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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Yang D, Wang D, Liu H, Zhao X, Lu Y, Lai S, Liu Y. Ionic palladium complex as an efficient and recyclable catalyst for the carbonylative Sonogashira reaction. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61022-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ananthnag GS, Mague JT, Balakrishna MS. Cyclodiphosphazane appended with pyridyl functionalities: Reactivity, transition metal chemistry and structural studies. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Lai SJ, Li YQ, Zhang H, Zhao XL, Liu Y. Au(I)-complexes ligated by hybrid P,S,N-ligands as the efficient catalysts for hydration of phenylacetylene. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2014.08.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Paretzki A, Bubrin M, Fiedler J, Záliš S, Kaim W. Correlated Coordination and Redox Activity of a Hemilabile Noninnocent Ligand in Nickel Complexes. Chemistry 2014; 20:5414-22. [DOI: 10.1002/chem.201304316] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Indexed: 11/07/2022]
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Kennedy RD, Machan CW, McGuirk CM, Rosen MS, Stern CL, Sarjeant AA, Mirkin CA. General Strategy for the Synthesis of Rigid Weak-Link Approach Platinum(II) Complexes: Tweezers, Triple-Layer Complexes, and Macrocycles. Inorg Chem 2013; 52:5876-88. [DOI: 10.1021/ic302855f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Robert D. Kennedy
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
| | - Charles W. Machan
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
| | - C. Michael McGuirk
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
| | - Mari S. Rosen
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
| | - Charlotte L. Stern
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
| | - Amy A. Sarjeant
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
| | - Chad A. Mirkin
- Department of Chemistry
and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208,
United States
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Huang J, Liu PY, Zhu H, Bao SS, Zheng LM, Ma J. Supramolecular Isomerism of One-Dimensional Copper(II) Phosphonate and Its Influence on the Magnetic Properties. Chempluschem 2012. [DOI: 10.1002/cplu.201200188] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Machan CW, Adelhardt M, Sarjeant AA, Stern CL, Sutter J, Meyer K, Mirkin CA. One-Pot Synthesis of an Fe(II) Bis-Terpyridine Complex with Allosterically Regulated Electronic Properties. J Am Chem Soc 2012; 134:16921-4. [DOI: 10.1021/ja3045019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles W. Machan
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Mario Adelhardt
- Department of Chemistry and
Pharmacy, Inorganic Chemistry, University Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Amy A. Sarjeant
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Charlotte L. Stern
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Jörg Sutter
- Department of Chemistry and
Pharmacy, Inorganic Chemistry, University Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and
Pharmacy, Inorganic Chemistry, University Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Chad A. Mirkin
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
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