1
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Mandal C, Joshi S, Das S, Mishra S, Mukherjee D. 2-Anilidomethylpyridine-Derived Three-Coordinate Zinc Hydride: The Journey Unveils Anilide Backbone's Reactive Nature. Inorg Chem 2024; 63:739-751. [PMID: 38127496 DOI: 10.1021/acs.inorgchem.3c03673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Low-coordinate heteroleptic zinc hydrides are catalytically important but rare and synthetically challenging. We herein report three-coordinate monomeric zinc hydride on a 2-anilidomethylpyridine framework (NNL). The synthetic success comes through systematically screening a few different routes from different precursors. During the process, the ligand's anilide backbone interestingly appears to be more reactive than Zn's terminal site to electrophilic Lewis and Brønsted acids. The proligand NNLH reacts with [Zn{N(SiMe3)2}2] and ZnEt2 to give [(NNL)ZnA] (A = N(SiMe3)2 (1), Et(2)). Both are inert to PhSiH3 and H2 but react with HBpin only through the internal Zn-Nanilide bond to give the borylated ligand NNLBpin (3). The reactions of 1 and 2 with Ph3EOH (E = C, Si) afford a series of divergent compounds like [(NNLH)Zn(OSiPh3)2] (4), [Zn3(OSiPh3)4Et2] (5), and [EtZn(OCPh3)] (6). But in all cases, it is invariably the Zn-Nanilide bond protonated by the -OH with equal or higher preference than the terminal Zn-N or Zn-C bonds. A DFT analysis rationalizes the origin of such a reactivity pattern. Realizing that an acid-free route might be the key, reacting [(NNL)Li] with ZnBr2 gives [(NNL)Zn(μ-Br)]2 (7), which on successively treating with KOSiPh3 and PhSiH3 gives the desired [(NNL)ZnH] (8) as a three-coordinate monomer with a terminal Zn-H bond. Estimating the ligand steric in 8 shows the openness in Zn's coordination sphere, a desired criterion for efficient catalysis. This and a positive influence of the pyridyl sidearm is reflected in 8's superior activity in hydroborating PhC(O)Me by HBpin in comparison to Jones' two-coordinate anilido zinc hydride.
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Affiliation(s)
- Chhotan Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
| | - Shalini Joshi
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Sanjay Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Debabrata Mukherjee
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
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2
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Kulyabin PS, Uborsky DV, Voskoboynikov AZ, Canich JAM, Hagadorn JR. Pyridylamido hafnium complexes with a silylene bridge: synthesis and olefin polymerization. Dalton Trans 2020; 49:6693-6702. [DOI: 10.1039/d0dt01031f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Pyridylamido hafnium complexes with a silylene bridge were synthesized, characterized with X-ray crystal structure analysis and shown to polymerize 1-hexene and propene and copolymerize ethylene and 1-octene.
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Affiliation(s)
- Pavel S. Kulyabin
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
| | - Dmitry V. Uborsky
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
| | | | - Jo Ann M. Canich
- Baytown Technology and Engineering Complex
- ExxonMobil Chemical Company
- Baytown
- USA
| | - John R. Hagadorn
- Baytown Technology and Engineering Complex
- ExxonMobil Chemical Company
- Baytown
- USA
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3
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Imidazole‐Bridged Tetrameric Group(IV) Heteroleptic Complexes from the Spontaneous Metal‐Ligand Assembly of a Potentially
N
4
‐Tetradentate Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Sun Q, Chen P, Wang Y, Luo Y, Yuan D, Yao Y. Addition of C–H Bonds of Pyridine Derivatives to Alkenes Catalyzed by Zirconium Complexes Bearing Amine-Bridged Bis(phenolato) Ligands. Inorg Chem 2018; 57:11788-11800. [DOI: 10.1021/acs.inorgchem.8b01959] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People’s Republic of China
| | - Ping Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Yunjie Luo
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
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5
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Luconi L, Rossin A, Tuci G, Gafurov Z, Lyubov DM, Trifonov AA, Cicchi S, Ba H, Pham‐Huu C, Yakhvarov D, Giambastiani G. Benzoimidazole‐Pyridylamido Zirconium and Hafnium Alkyl Complexes as Homogeneous Catalysts for Tandem Carbon Dioxide Hydrosilylation to Methane. ChemCatChem 2018. [DOI: 10.1002/cctc.201800077] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lapo Luconi
- Institute of Chemistry of OrganoMetallic Compounds, ICCOM-CNR Via Madonna del Piano, 10 50019 Sesto Fiorentino (Florence) Italy
| | - Andrea Rossin
- Institute of Chemistry of OrganoMetallic Compounds, ICCOM-CNR Via Madonna del Piano, 10 50019 Sesto Fiorentino (Florence) Italy
| | - Giulia Tuci
- Institute of Chemistry of OrganoMetallic Compounds, ICCOM-CNR Via Madonna del Piano, 10 50019 Sesto Fiorentino (Florence) Italy
- Department of Chemistry “Ugo Schiff”University of Florence 50019 Sesto Fiorentino Italy
| | - Zufar Gafurov
- A.E.Arbuzov Institute of Organic and Physical ChemistryRussian Academy of Sciences Arbuzov str. 8 420088 Kazan Russian Federation
- Kazan Federal University 420008 Kazan Russian Federation
| | - Dmitrii M. Lyubov
- G. A. Razuvaev Institute of Organometallic Chemistry of theRussian Academy of Sciences Tropinina 49, GSP-445 603950 Nizhny Novgorod Russia
| | - Alexander A. Trifonov
- G. A. Razuvaev Institute of Organometallic Chemistry of theRussian Academy of Sciences Tropinina 49, GSP-445 603950 Nizhny Novgorod Russia
| | - Stefano Cicchi
- Department of Chemistry “Ugo Schiff”University of Florence 50019 Sesto Fiorentino Italy
| | - Housseinou Ba
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES-CNRS)UMR 7515 CNRS-University of Strasbourg (UdS) France
| | - Cuong Pham‐Huu
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES-CNRS)UMR 7515 CNRS-University of Strasbourg (UdS) France
| | - Dmitry Yakhvarov
- A.E.Arbuzov Institute of Organic and Physical ChemistryRussian Academy of Sciences Arbuzov str. 8 420088 Kazan Russian Federation
- Kazan Federal University 420008 Kazan Russian Federation
| | - Giuliano Giambastiani
- Institute of Chemistry of OrganoMetallic Compounds, ICCOM-CNR Via Madonna del Piano, 10 50019 Sesto Fiorentino (Florence) Italy
- Kazan Federal University 420008 Kazan Russian Federation
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6
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Cimino A, Moscatelli F, Ferretti F, Ragaini F, Germain S, Hannedouche J, Schulz E, Luconi L, Rossin A, Giambastiani G. Novel yttrium and zirconium catalysts featuring reduced Ar-BIANH2 ligands for olefin hydroamination (Ar-BIANH2 = bis-arylaminoacenaphthylene). NEW J CHEM 2016. [DOI: 10.1039/c6nj02199a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Even demanding aminoalkenes can be cyclized by Ar-BIANH2 yttrium complexes; a related zirconium complex has been crystallographically characterized.
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Affiliation(s)
- Alessandro Cimino
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Filippo Moscatelli
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Francesco Ferretti
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Fabio Ragaini
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Stéphane Germain
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Jérôme Hannedouche
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Emmanuelle Schulz
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Lapo Luconi
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
| | - Andrea Rossin
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
| | - Giuliano Giambastiani
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
- Kazan Federal University
- 420008 Kazan
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7
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Gallegos C, Camacho R, Valiente M, Cuenca T, Cano J. Cyclopentadienyl-based Mg complexes in the intramolecular hydroamination of aminoalkenes: mechanistic evidence for cationic versus neutral magnesium derivatives. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01040c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Mechanistic evidence in the catalytic hydroamination of aminoalkenes for a cationic magnesium derivative.
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Affiliation(s)
- Carlos Gallegos
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Ruth Camacho
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Mercedes Valiente
- Dpto de Química Física
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Tomás Cuenca
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Jesús Cano
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
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8
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Zhang Y, Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Intramolecular hydroamination reactions catalyzed by zirconium complexes bearing bridged bis(phenolato) ligands. RSC Adv 2016. [DOI: 10.1039/c5ra23270h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Cationic species derived from zirconium complexes stabilized by bridged bis(phenolato) ligands showed good activities in catalyzing intramolecular hydroamination/cyclization of primary and secondary amines.
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Affiliation(s)
- Yu Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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9
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Clark WD, Akurathi G, Valle HU, Hollis TK. Crystal structure of tris-(di-methyl-amido-κN)-bis-(di-methyl-amine-κN)-zirconium(IV) iodide. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2016; 72:73-5. [PMID: 26870590 PMCID: PMC4704753 DOI: 10.1107/s2056989015023919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 12/11/2015] [Indexed: 11/13/2022]
Abstract
The crystal structure of tris(dimethylamido)bis(dimethylamine) zirconium(IV) iodide is reported. Zirconium amides have become increasingly popular and useful due to their widespread use as precursors to other zirconium complexes and their use in the production of solid oxide fuel cells (SOFCs). Herein we report the molecular structure of tris(dimethylamido)bis(dimethylamine)zirconium(IV) iodide, [Zr(C2H6N)3(C2H7N)2]I. The bond lengths and bond angles are consistent with a slightly distorted trigonal–bipyramidal coordination geometry around the metal atom. N⋯I contacts of 3.6153 (15) and 3.5922 (14) Å are consistent with the presence of N—H⋯I interactions. These N—H⋯I interactions link the complex cations and iodide anions into extended chains that propagate parallel to the a axis.
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Affiliation(s)
- Wesley D Clark
- Department of Chemistry, Mississippi State University, Mississippi State, 39762, USA
| | | | - Henry U Valle
- Department of Chemistry, Mississippi State University, Mississippi State, 39762, USA
| | - T Keith Hollis
- Department of Chemistry, Mississippi State University, Mississippi State, 39762, USA
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10
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Bailey WD, Luconi L, Rossin A, Yakhvarov D, Flowers SE, Kaminsky W, Kemp RA, Giambastiani G, Goldberg KI. Pyrazole-Based PCN Pincer Complexes of Palladium(II): Mono- and Dinuclear Hydroxide Complexes and Ligand Rollover C–H Activation. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00355] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wilson D. Bailey
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Lapo Luconi
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, 50019 Sesto F.no Florence, Italy
| | - Andrea Rossin
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, 50019 Sesto F.no Florence, Italy
| | | | - Sarah E. Flowers
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Werner Kaminsky
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Richard A. Kemp
- Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
- Advanced
Materials Laboratory, Sandia National Laboratories, Albuquerque, New Mexico 87106, United States
| | - Giuliano Giambastiani
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, 50019 Sesto F.no Florence, Italy
- Kazan Federal University, 420008 Kazan, Russian Federation
| | - Karen I. Goldberg
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
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11
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Elagab HA, Alt HG. Bis(benzimidazolyl, benzothiazolyl, and benzoxazolyl)benzene complexes as catalysts for ethylene polymerization. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.01.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Zirconium catalysed intermolecular hydroamination reactions of secondary amines with alkynes. Chem Commun (Camb) 2015; 51:7633-6. [DOI: 10.1039/c5cc01780g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of group 4 metal catalysts capable of mediating intermolecular hydroamination reactions of secondary aromatic amines is reported.
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Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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13
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Germain S, Schulz E, Hannedouche J. Anti-Markovnikov Hydroamination of Aromatic Alkenes with Secondary Amines Catalyzed by Easily Accessible Yttrium Complexes. ChemCatChem 2014. [DOI: 10.1002/cctc.201402012] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Synthesis of Group 4 Metal Complexes Stabilized by an Amine-Bridged Bis(phenolato) Ligand and Their Catalytic Behavior in Intermolecular Hydroamination Reactions. Organometallics 2014. [DOI: 10.1021/om401158a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
- The Institute of Low Carbon Economy, Suzhou 215123, People’s Republic of China
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
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15
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Metal and halogen dependence of the rate effect in hydroamination/cyclization of unactivated aminoalkenes: Synthesis, characterization, and catalytic rates of CCC-NHC hafnium and zirconium pincer complexes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.11.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Luconi L, Klosin J, Smith AJ, Germain S, Schulz E, Hannedouche J, Giambastiani G. Cationic Group-IV pincer-type complexes for polymerization and hydroamination catalysis. Dalton Trans 2013; 42:16056-65. [PMID: 23945547 DOI: 10.1039/c3dt51620b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neutral Zr(IV) and Hf(IV) dimethyl complexes stabilized by unsymmetrical dianionic {N,C,N'} pincer ligands have been prepared from their corresponding bis-amido complexes upon treatment with AlMe3. Their structure consists of a central σ-bonded aryl donor group (C) capable of forming robust M-C bonds with the metal center, enforced by the synergic effect of both the coordination of peripheral donor groups (N) and the chelating rigid structure of the {N,C,N} ligand framework. Such a combination translates into systems having a unique balance between stability and reactivity. These Zr(IV) and Hf(IV) dimethyl complexes were converted in situ into cationic species [M(IV){N(-),C(-),N}Me][B(C6F5)4] which are active catalysts for the room temperature (r.t.) intramolecular hydroamination/cyclization of primary and secondary aminoalkenes as well as for the high temperature ethylene-1-octene copolymerizations.
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Affiliation(s)
- Lapo Luconi
- Institute of Chemistry of OrganoMetallic Compounds ICCOM-CNR, Via Madonna del Piano, 10-50019, Sesto F.no., Florence, Italy.
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