1
|
McGlinchey MJ. Hexaethylbenzene: A Sterically Crowded Arene and Conformationally Versatile Ligand. Chempluschem 2018; 83:480-499. [DOI: 10.1002/cplu.201800045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/14/2018] [Indexed: 11/06/2022]
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Miles WH, Robinson MJ, Lessard SG, Thamattoor DM. Through-Space Shielding Effects of Metal-Complexed Phenyl Rings. J Org Chem 2016; 81:10791-10801. [PMID: 27754676 DOI: 10.1021/acs.joc.6b01858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several naphthalene compounds containing a methyl group in a 1,8-relationship to a metal-complexed phenyl ring bearing various substituents have been synthesized. The through-space shielding effects of the phenyl ring, as a function of substituent and complexing metal species, were monitored by observing the 1H NMR signal of the methyl group located in the shielding zone of the ring. In all cases, the methyl signal was slightly more downfield in the complexes than in the uncomplexed analogues. A comparison of available crystal structures, however, shows that the phenyl ring is slightly closer to the naphthyl methyl group in the complexes than in their metal-free counterparts. X-ray structures and DFT calculations also reveal a slight elongation in the average length of the carbon-carbon bonds of the phenyl ring upon complexation. The effect of substituents on the signal of the naphthyl methyl group is small but discernible in the uncomplexed derivatives, and consistent with our previous report. A similar trend is absent in the corresponding metal complexes, as exemplified by the chromium series, and the effect of the metal appears to be more dominant than that of the substituents. These observations were found to be in line with NMR shift calculations.
Collapse
Affiliation(s)
- William H Miles
- Department of Chemistry, Lafayette College , Easton, Pennsylvania 18042, United States
| | - Michael J Robinson
- Department of Chemistry, Lafayette College , Easton, Pennsylvania 18042, United States
| | - Samantha G Lessard
- Department of Chemistry, Colby College , Waterville, Maine 04901, United States
| | - Dasan M Thamattoor
- Department of Chemistry, Colby College , Waterville, Maine 04901, United States
| |
Collapse
|
4
|
McGlinchey MJ, Milosevic S. From [10]Paracyclophane to Ferrocenophanones: The Search for Molecular Machines and Bio-Organometallic Anticancer Drugs. Isr J Chem 2011. [DOI: 10.1002/ijch.201100080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
5
|
Deramchi K, Maouche B, Kahlal S, Saillard JY. Haptotropic shifts in mononuclear complexes of substituted pentalenes: A DFT investigation of the [CpFe(C8H4R2)]q (R=H, Me, NH2, CF3, CN ; q=−1, 0, +1) series. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
6
|
Kirillov E, Kahlal S, Roisnel T, Georgelin T, Saillard JY, Carpentier JF. Haptotropic Rearrangements in Sandwich (Fluorenyl)(Cyclopentadienyl) Iron and Ruthenium Complexes. Organometallics 2008. [DOI: 10.1021/om701109z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Evgueni Kirillov
- UMR 6226 Sciences Chimiques de Rennes, CNRS-University of Rennes 1, 35042 Rennes Cedex, France
| | - Samia Kahlal
- UMR 6226 Sciences Chimiques de Rennes, CNRS-University of Rennes 1, 35042 Rennes Cedex, France
| | - Thierry Roisnel
- UMR 6226 Sciences Chimiques de Rennes, CNRS-University of Rennes 1, 35042 Rennes Cedex, France
| | - Thomas Georgelin
- UMR 6226 Sciences Chimiques de Rennes, CNRS-University of Rennes 1, 35042 Rennes Cedex, France
| | - Jean-Yves Saillard
- UMR 6226 Sciences Chimiques de Rennes, CNRS-University of Rennes 1, 35042 Rennes Cedex, France
| | | |
Collapse
|
7
|
Chierotti MR, Garlaschelli L, Gobetto R, Nervi C, Peli G, Sironi A, Della Pergola R. An Unusual Carbonyl Chemical Shift in a Carbonylhexairidium Cluster: A Combined Solid‐State NMR and DFT Approach. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200601040] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michele R. Chierotti
- Dipartimento di Chimica Inorganica, Chimica Fisica, Chimica dei Materiali, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Luigi Garlaschelli
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università degli Studi di Milano, Via G. Venezian 21, 20133 Milano, Italy
| | - Roberto Gobetto
- Dipartimento di Chimica Inorganica, Chimica Fisica, Chimica dei Materiali, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Carlo Nervi
- Dipartimento di Chimica Inorganica, Chimica Fisica, Chimica dei Materiali, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Giulia Peli
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università degli Studi di Milano, Via G. Venezian 21, 20133 Milano, Italy
| | - Annalisa Sironi
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università degli Studi di Milano, Via G. Venezian 21, 20133 Milano, Italy
| | - Roberto Della Pergola
- Dipartimento di Scienze dell'Ambiente e del Territorio dell'Università di Milano‐Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
| |
Collapse
|
8
|
Hahn FE, Jahnke MC, Pape T. Synthesis of Pincer-Type Bis(benzimidazolin-2-ylidene) Palladium Complexes and Their Application in C−C Coupling Reactions. Organometallics 2006. [DOI: 10.1021/om060882w] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- F. Ekkehardt Hahn
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany
| | - Mareike C. Jahnke
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany
| | - Tania Pape
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany
| |
Collapse
|
9
|
Hahn FE, Jahnke MC, Gomez-Benitez V, Morales-Morales D, Pape T. Synthesis and Catalytic Activity of Pincer-Type Bis(benzimidazolin-2-ylidene) Palladium Complexes. Organometallics 2005. [DOI: 10.1021/om0507124] [Citation(s) in RCA: 183] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. Ekkehardt Hahn
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany, and Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria, Circuito Exterior, Coyoacan, 04510 Mexico D.F., Mexico
| | - Mareike C. Jahnke
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany, and Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria, Circuito Exterior, Coyoacan, 04510 Mexico D.F., Mexico
| | - Valente Gomez-Benitez
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany, and Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria, Circuito Exterior, Coyoacan, 04510 Mexico D.F., Mexico
| | - David Morales-Morales
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany, and Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria, Circuito Exterior, Coyoacan, 04510 Mexico D.F., Mexico
| | - Tania Pape
- Institut für Anorganische und Analytische Chemie der Westfälischen Wilhelms-Universität Münster, Corrensstrasse 36, D-48149 Münster, Germany, and Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria, Circuito Exterior, Coyoacan, 04510 Mexico D.F., Mexico
| |
Collapse
|
10
|
Brachais L, Visseaux M. NMR
T
1
‐Relaxation Measurements on Paramagnetic Organolanthanides:An Alternative Tool for Structure Determination in Solution. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Laurent Brachais
- Laboratoire de Synthèse et Electrosynthèse Organométalliques – UMR 5188 CNRS, Université de Bourgogne, B. P. 47870, 21078 Dijon, France, Fax: +33‐3‐8039‐6084
| | - Marc Visseaux
- Laboratoire de Synthèse et Electrosynthèse Organométalliques – UMR 5188 CNRS, Université de Bourgogne, B. P. 47870, 21078 Dijon, France, Fax: +33‐3‐8039‐6084
- Present address: Laboratoire de Catalyse de Lille, UMR CNRS 8010, ENSCL B. P. 108, 59652 Villeneuve d’Ascq Cedex, France, Fax: +33‐3‐2043‐6585
| |
Collapse
|
11
|
Affiliation(s)
- Gregg S Kottas
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA
| | | | | | | |
Collapse
|
12
|
Balduzzi S, Müller-Bunz H, McGlinchey MJ. A Convenient Synthetic Route to Benz[cd]azulenes: Versatile Ligands with the Potential To Bind Metals in an η5, η6, or η7Fashion. Chemistry 2004; 10:5398-405. [PMID: 15378728 DOI: 10.1002/chem.200400425] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A facile method for preparing the 2H-benz[cd]azulene system, based upon an elaboration of the guaiazulene framework, is presented. Aerial oxidation to the corresponding 8-(2-propylidene)-benz[cd]azulene, and also cycloaddition reactions with tetracyanoethylene (TCNE), are described. The first X-ray crystal structure of a 2H-benz[cd]azulene, as an eta6-coordinated Cr(CO)3 complex, is reported.
Collapse
Affiliation(s)
- Sonya Balduzzi
- Department of Chemistry, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | | | | |
Collapse
|
13
|
Harrington LE, Cahill LS, McGlinchey MJ. Toward an Organometallic Molecular Brake with a Metal Foot Pedal: Synthesis, Dynamic Behavior, and X-ray Crystal Structure of [(9-Indenyl)triptycene]chromium Tricarbonyl. Organometallics 2004. [DOI: 10.1021/om0499456] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Laura E. Harrington
- Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University College Dublin, Belfield, Dublin 4, Ireland
| | - Lindsay S. Cahill
- Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University College Dublin, Belfield, Dublin 4, Ireland
| | - Michael J. McGlinchey
- Departments of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1, and University College Dublin, Belfield, Dublin 4, Ireland
| |
Collapse
|
14
|
Affiliation(s)
- Vered Marks
- Department of Chemistry, Bar‐Ilan University, Ramat‐Gan 52900, Israel
| | - Hugo E. Gottlieb
- Department of Chemistry, Bar‐Ilan University, Ramat‐Gan 52900, Israel
| | - Silvio E. Biali
- Department of Organic Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| |
Collapse
|