1
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Sarker RK, Zargarian D. Reactions of cyclonickelated complexes with hydroxylamines and TEMPO˙: isolation of new TEMPOH adducts of Ni(II) and their reactivities with nucleophiles and oxidants. Dalton Trans 2024; 53:10208-10219. [PMID: 38826045 DOI: 10.1039/d4dt00605d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
This contribution describes a study on the reactivities of the complexes [{κP,κC-(i-Pr)2PO-Ar}Ni(μ-Br)]2, 1a-d (Ar: C6H4, a; 3-Cl-C6H3, b; 3-OMe-C6H3, c; 4-OMe-napthalenyl, d), with hydroxylamines in the presence of TEMPO˙ (TEMPO˙ = (2,2,6,6-tetramethylpiperidinyl-1-yl)oxyl). The results of this study showed that treating 1a-d with a mixture of Et2NOH and TEMPO˙ did not afford the desired oxidation-induced functionalization of the Ni-aryl moiety in 1a-d, giving instead the corresponding κO-TEMPOH adducts [{κP,κC-(i-Pr)2PO-Ar}Ni(Br)(κO-TEMPOH)], 3a-d (TEMPOH = N-hydroxy-2,2,6,6-tetramethylpiperidine). The TEMPOH moiety in these zwitterionic compounds 3 can be displaced by a large excess of acetonitrile (MeCN), 10 equiv. of morpholine, or 1-2 equivalents of imidazole. Although these reactions have given the authenticated products [{κP,κC-(i-Pr)2PO-C6H4}Ni(Br)(NCMe)], 4a, [{κP,κC-(i-Pr)2PO-C6H4}Ni(Br)(morpholine)], 5a, and [{κP,κC-(i-Pr)2PO-C6H4}Ni(imidazole)2]Br, 6a, a few other products were also detected by NMR, indicating that the observed reactivities are far more complex than simple substitution of the TEMPOH moiety. Similarly, treating 3a with AgOC(O)CF3 results in the isolation of [{κP,κC-(i-Pr)2PO-C6H4}Ni{OC(O)CF3}(κO-TEMPOH)], 7a, arising from the substitution of the bromo ligand, whereas spectroscopic evidence suggests further reactivity, possibly including displacement of TEMPOH and oxidative decomposition.
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Affiliation(s)
- Rajib K Sarker
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada.
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada.
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2
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Adilkhanova A, Frolova VF, Yessengazin A, Öztopçu Ö, Gudun KA, Segizbayev M, Matsokin NA, Dmitrienko A, Pilkington M, Khalimon AY. Synthesis and catalytic performance of nickel phosphinite pincer complexes in deoxygenative hydroboration of amides. Dalton Trans 2023; 52:2872-2886. [PMID: 36762562 DOI: 10.1039/d2dt03801c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A series of imino-POCNR, amino-POCNR2, and bis(phosphinite) POCOP pincer complexes of Ni(II) were prepared and tested in catalytic deoxygenative hydroboration of amides with HBPin to the corresponding amines. In contrast to the deoxygenative hydrosilylation approach, primarily developed for tertiary amides, superior reactivity in Ni-catalyzed deoxygenative hydroboration was demonstrated for secondary carboxamides. The bis(phosphinite) hydride complex (POCOP)NiH proved the most active in these reactions, tolerating potentially reducible functionalities such as internal alkenes, esters, nitriles, heteroaromatic compounds, and tertiary amides. Preferable hydroboration of secondary amides was also demonstrated in the presence of primary amide functionalities. The reactions were conducted at 60-80 °C, representing a rare example of a base-metal catalytic system for selective deoxygenation of secondary amides to the corresponding amines under mild conditions. In contrast to secondary amides, deoxygenative hydroboration of primary amides was demonstrated using an iminophosphinite pre-catalyst (POCNDmp)Ni(CH2TMS) (Dmp = 2,6-Me2C6H3). Deoxygenation reactions were suggested to proceed via a direct C-O bond cleavage mechanism, which is triggered by dehydrogenative N-borylation to access more electrophilic N-borylamides amenable to the addition of HBPin to the carbonyl group.
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Affiliation(s)
- Aziza Adilkhanova
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan. .,School of Mining and Geosciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan
| | - Valeriya F Frolova
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Azamat Yessengazin
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Özgür Öztopçu
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Kristina A Gudun
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
| | - Medet Segizbayev
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St Catharines, Ontario L2S 3A1, Canada
| | - Nikita A Matsokin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Anton Dmitrienko
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St Catharines, Ontario L2S 3A1, Canada.,Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario N9B 3P4, Canada
| | - Melanie Pilkington
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St Catharines, Ontario L2S 3A1, Canada
| | - Andrey Y Khalimon
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan.
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3
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Gafurov ZN, Kantyukov AO, Kagilev AA, Kagileva AA, Sakhapov IF, Mikhailov IK, Yakhvarov DG. Recent Advances in Chemistry of Unsymmetrical Phosphorus-Based Pincer Nickel Complexes: From Design to Catalytic Applications. Molecules 2021; 26:4063. [PMID: 34279402 PMCID: PMC8271868 DOI: 10.3390/molecules26134063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/27/2021] [Accepted: 06/29/2021] [Indexed: 11/25/2022] Open
Abstract
Pincer complexes play an important role in organometallic chemistry; in particular, their use as homogeneous catalysts for organic transformations has increased dramatically in recent years. The high catalytic activity of such bis-cyclometallic complexes is associated with the easy tunability of their properties. Moreover, the phosphorus-based unsymmetrical pincers showed higher catalytic activity than the corresponding symmetrical analogues in several catalytic reactions. However, in modern literature, an increasing interest in the development of catalysts based on non-precious metals is observed. For example, nickel, which is an affordable and sustainable analogue of platinum and palladium, known for its low toxicity, has attracted increasing attention in the catalytic chemistry of transition metals in recent years. Thus, this mini-review is devoted to the recent advances in the chemistry of unsymmetrical phosphorus-based pincer nickel complexes, including the ligand design, the synthesis of nickel complexes and their catalytic applications.
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Affiliation(s)
- Zufar N Gafurov
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088 Kazan, Russia
| | - Artyom O Kantyukov
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088 Kazan, Russia
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Alexey A Kagilev
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088 Kazan, Russia
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Alina A Kagileva
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088 Kazan, Russia
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Il'yas F Sakhapov
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088 Kazan, Russia
| | - Ilya K Mikhailov
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Dmitry G Yakhvarov
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, 420088 Kazan, Russia
- Alexander Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
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4
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Luconi L, Tuci G, Gafurov ZN, Mercuri G, Kagilev AA, Pettinari C, Morozov VI, Yakhvarov DG, Rossin A, Giambastiani G. Unsymmetrical nickel (PCN) pincer complexes with a benzothiazole side-arm: Synthesis, characterization and electrochemical properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120182] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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5
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Rahimi N, Zargarian D. Cationic tetra- and pentacoordinate complexes of nickel based on POCN- and POCOP-type pincer ligands: synthesis, characterization, and ligand exchange studies. NEW J CHEM 2021. [DOI: 10.1039/d1nj01355f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The closely related pincer ligands POCN and POCOP display different electron donating properties and different degrees of resistance to ligand exchange reactions proceeding via cationic reaction intermediates.
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Affiliation(s)
- Naser Rahimi
- Département de chimie, Université de Montréal, Montréal (Québec), H3C 3J7, Canada
| | - Davit Zargarian
- Département de chimie, Université de Montréal, Montréal (Québec), H3C 3J7, Canada
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6
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Segizbayev M, Öztopçu Ö, Hayrapetyan D, Shakhman D, Lyssenko KA, Khalimon AY. Transfer hydrogenation of aldehydes and ketones catalyzed using an aminophosphinite POCNH pincer complex of Ni(ii). Dalton Trans 2020; 49:11950-11957. [DOI: 10.1039/d0dt02264k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(POCNH)NiBr catalyzes the transfer hydrogenation of aldehydes and ketones in iPrOH. The reactions tolerate alkenes, esters, amides, nitriles, and heterocycles and proceed via the metal–ligand cooperative mechanism through (POCN)NiII species.
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Affiliation(s)
- Medet Segizbayev
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Özgür Öztopçu
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Davit Hayrapetyan
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Dinmukhamed Shakhman
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
| | - Konstantin A. Lyssenko
- Department of Chemistry
- Lomonosov Moscow State University
- Moscow 119991
- Russia
- Plekhanov Russian University of Economics
| | - Andrey Y. Khalimon
- Department of Chemistry
- School of Sciences and Humanities
- Nazarbayev University
- Nur-Sultan 010000
- Kazakhstan
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7
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Mangin LP, Zargarian D. C–H Nickelation of Naphthyl Phosphinites: Electronic and Steric Limitations, Regioselectivity, and Tandem C–P Functionalization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00660] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Loïc P. Mangin
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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8
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Importance of thorough conformational analysis in modelling transition metal-mediated reactions: Case studies on pincer complexes containing phosphine groups. JOURNAL OF SAUDI CHEMICAL SOCIETY 2019. [DOI: 10.1016/j.jscs.2019.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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9
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Lapointe S, Khaskin E, Fayzullin RR, Khusnutdinova JR. Nickel(II) Complexes with Electron-Rich, Sterically Hindered PNP Pincer Ligands Enable Uncommon Modes of Ligand Dearomatization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00558] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Sébastien Lapointe
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Eugene Khaskin
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Robert R. Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FCR Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Street, Kazan 420088, Russian Federation
| | - Julia R. Khusnutdinova
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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10
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Affiliation(s)
- Loïc P. Mangin
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Davit Zargarian
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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11
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Lapointe S, Khaskin E, Fayzullin RR, Khusnutdinova JR. Stable Nickel(I) Complexes with Electron-Rich, Sterically-Hindered, Innocent PNP Pincer Ligands. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sébastien Lapointe
- Okinawa Institute of Science and Technology Graduate University, Coordination Chemistry and Catalysis Unit, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Eugene Khaskin
- Okinawa Institute of Science and Technology Graduate University, Coordination Chemistry and Catalysis Unit, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Robert R. Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FCR Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Street, Kazan 420088, Russian Federation
| | - Julia R. Khusnutdinova
- Okinawa Institute of Science and Technology Graduate University, Coordination Chemistry and Catalysis Unit, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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12
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Cloutier JP, Rechignat L, Canac Y, Ess DH, Zargarian D. C-O and C-N Functionalization of Cationic, NCN-Type Pincer Complexes of Trivalent Nickel: Mechanism, Selectivity, and Kinetic Isotope Effect. Inorg Chem 2019; 58:3861-3874. [PMID: 30821151 DOI: 10.1021/acs.inorgchem.8b03489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This report presents the synthesis of new mono- and dicationic NCN-NiIII complexes and describes their reactivities with protic substrates. (NCN is the pincer-type ligand κ N, κ C, κ N-2,6-(CH2NMe2)2-C6H3.) Treating van Koten's trivalent complex (NCN)NiIIIBr2 with AgSbF6 in acetonitrile gives the dicationic complex [(NCN)NiIII(MeCN)3]2+, whereas the latter complex undergoes a ligand-exchange reaction with (NCN)NiIIIBr2 to furnish the related monocationic complex [(NCN)NiIII(Br)(MeCN)]+. These trivalent complexes have been characterized by X-ray diffraction analysis and EPR spectroscopy. Treating these trivalent complexes with methanol and methylamine led, respectively, to C-OCH3 or C-NH(CH3) functionalization of the Ni-aryl moiety in these complexes, C-heteroatom bond formation taking place at the ipso-C. These reactions also generate the cationic divalent complex [(NCN)NiII(NCMe)]+, which was prepared independently and characterized fully. The unanticipated formation of the latter divalent species suggested a comproportionation side reaction between the cationic trivalent precursors and a monovalent species generated at the C-O and C-N bond formation steps; this scenario was supported by direct reaction of the trivalent complexes with the monovalent compound (PPh3)3NiICl. Kinetic measurements and density functional theory analysis have been used to investigate the mechanism of these C-O and C-N functionalization reactions and to rationalize the observed inverse kinetic isotope effect in the reaction of [(NCN)NiIII(Br)(MeCN)]+ with CH3OH/CD3OD.
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Affiliation(s)
| | | | - Yves Canac
- LCC-CNRS , Université de Toulouse , CNRS, Toulouse , France
| | - Daniel H Ess
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84604 , United States
| | - Davit Zargarian
- Département de chimie , Université de Montréal , Montréal , Québec H3C 3J7 , Canada
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13
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Gudun KA, Segizbayev M, Adamov A, Plessow PN, Lyssenko KA, Balanay MP, Khalimon AY. POCN Ni(ii) pincer complexes: synthesis, characterization and evaluation of catalytic hydrosilylation and hydroboration activities. Dalton Trans 2019; 48:1732-1746. [DOI: 10.1039/c8dt04854a] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(POCN)Ni(ii) complexes were found to mediate a variety of carbonyl hydroboration reactions, including chemoselective hydroboration of benzaldehyde and hydroborative reduction of amides.
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Affiliation(s)
- Kristina A. Gudun
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Medet Segizbayev
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Assyl Adamov
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Philipp N. Plessow
- Institute of Catalysis Research and Technology (IKFT)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - Konstantin A. Lyssenko
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- Moscow 119991
- Russia
- Plekhanov Russian University of Economics
| | - Mannix P. Balanay
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
| | - Andrey Y. Khalimon
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- Astana 010000
- Kazakhstan
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14
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Kurisu N, Asano E, Hatayama Y, Kurihara Y, Hashimoto T, Funatsu K, Ueda K, Yamaguchi Y. A β-Diketiminato-Based Pincer-Type Nickel(II) Complex: Synthesis and Catalytic Performance in the Cross-Coupling of Aryl Fluorides with Aryl Grignard Reagents. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801179] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Nobutaka Kurisu
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Erika Asano
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Yuki Hatayama
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Youji Kurihara
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Toru Hashimoto
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Kei Funatsu
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Kazuyoshi Ueda
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
| | - Yoshitaka Yamaguchi
- Department of Advanced Materials Chemistry; Graduate School of Engineering; Yokohama National University; 79-5 Tokiwadai 240-8501 Hodogaya-ku, Yokohama Japan
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15
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Soobramoney L, Bala MD, Friedrich HB. Utilisation of new NiSNS pincer complexes in paraffin oxidation. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.04.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Gafurov ZN, Kagilev AA, Kantyukov AO, Balabaev AA, Sinyashin OG, Yakhvarov DG. Classification and synthesis of nickel pincer complexes. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2086-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Cloutier JP, Zargarian D. Functionalization of the Aryl Moiety in the Pincer Complex (NCN)NiIIIBr2: Insights on NiIII-Promoted Carbon–Heteroatom Coupling. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00103] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Davit Zargarian
- Département de chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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18
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POBOP pincer complexes of nickel(II): Synthesis and B H activation of the carborane ligand upon oxidation with iodine. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.10.040] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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19
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Mangin LP, Zargarian D. C–H nickellation of phenol-derived phosphinites: regioselectivity and structures of cyclonickellated complexes. Dalton Trans 2017; 46:16159-16170. [DOI: 10.1039/c7dt03403b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclonickellation of aryl phosphinites derived from substituted phenols is regioselective: high sensitivity to sterics favors nickellation at the less hindered C–H.
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Affiliation(s)
- Loïc P. Mangin
- Département de chimie
- Université de Montréal
- Montréal
- Canada H3C 3J7
| | - Davit Zargarian
- Département de chimie
- Université de Montréal
- Montréal
- Canada H3C 3J7
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20
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Bour JR, Camasso NM, Meucci EA, Kampf JW, Canty AJ, Sanford MS. Carbon–Carbon Bond-Forming Reductive Elimination from Isolated Nickel(III) Complexes. J Am Chem Soc 2016; 138:16105-16111. [DOI: 10.1021/jacs.6b10350] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- James R. Bour
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Nicole M. Camasso
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Elizabeth A. Meucci
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Jeff W. Kampf
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Allan J. Canty
- School
of Physical Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Melanie S. Sanford
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
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21
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Martinez GE, Ocampo C, Park YJ, Fout AR. Accessing Pincer Bis(carbene) Ni(IV) Complexes from Ni(II) via Halogen and Halogen Surrogates. J Am Chem Soc 2016; 138:4290-3. [PMID: 27014933 DOI: 10.1021/jacs.5b12827] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This communication describes the two-electron oxidation of ((DIPP)CCC)NiX ((DIPP)CCC = bis(diisopropylphenyl-benzimidazol-2-ylidene)phenyl); X = Cl or Br) with halogen and halogen surrogates to form ((DIPP)CCC)NiX3. These complexes represent a rare oxidation state of nickel, as well as an unprecedented reaction pathway to access these species through Br2 and halogen surrogate (benzyltrimethylammonium tribromide). The Ni(IV) complexes have been characterized by a suite of spectroscopic techniques and can readily reduce to the Ni(II) counterpart, allowing for cycling between the Ni(II)/Ni(IV) oxidation states.
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Affiliation(s)
- Gabriel Espinosa Martinez
- School of Chemical Sciences, University of Illinois at Urbana-Champaign , 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Cristian Ocampo
- School of Chemical Sciences, University of Illinois at Urbana-Champaign , 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Yun Ji Park
- School of Chemical Sciences, University of Illinois at Urbana-Champaign , 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Alison R Fout
- School of Chemical Sciences, University of Illinois at Urbana-Champaign , 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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22
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Vabre B, Canac Y, Lepetit C, Duhayon C, Chauvin R, Zargarian D. Charge Effects in PCP Pincer Complexes of NiIIbearing Phosphinite and Imidazol(i)ophosphine Coordinating Jaws: From Synthesis to Catalysis through Bonding Analysis. Chemistry 2015; 21:17403-14. [DOI: 10.1002/chem.201502491] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 11/11/2022]
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Lapointe S, Vabre B, Zargarian D. POCOP-Type Pincer Complexes of Nickel: Synthesis, Characterization, and Ligand Exchange Reactivities of New Cationic Acetonitrile Adducts. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00272] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sébastien Lapointe
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Boris Vabre
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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Khake SM, Soni V, Gonnade RG, Punji B. Design and development of POCN-pincer palladium catalysts for C-H bond arylation of azoles with aryl iodides. Dalton Trans 2015; 43:16084-96. [PMID: 25238444 DOI: 10.1039/c4dt01547a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Well-defined and efficient POCN-ligated palladium complexes have been developed for the direct C-H bond arylation of azoles with aryl iodides. The phosphinite-amine pincer ligands 1-(R2PO)-C6H4-3-(CH2N(i)Pr2) [(R2)POCN(iPr2)-H; R = (i)Pr (), R = (t)Bu ()] and corresponding palladium complexes {2-(R2PO)-C6H3-6-(CH2N(i)Pr2)}PdCl [((R2)POCN(iPr2))PdCl; R = (i)Pr (), R = (t)Bu ()] were synthesized in good yields. Treatment of palladium complex with KI and AgOAc afforded the complexes ((iPr2)POCN(iPr2))PdI () and ((iPr2)POCN(iPr2))Pd(OAc) (), respectively. Similarly, the reaction of with benzothiazolyl-lithium produces the ((iPr2)POCN(iPr2))Pd(benzothiazolyl) () complex in a quantitative yield. The pincer palladium complex efficiently catalyzes the C-H bond arylation of benzothiazole, substituted-benzoxazoles and 5-aryl oxazoles with diverse aryl iodides in the presence of CuI as a co-catalyst under mild reaction conditions. This represents the first example of a pincer palladium complex being applied for the direct C-H bond arylation of any heterocycle with low catalyst loading. A preliminary mechanistic investigation reveals that palladium nanoparticles are presumably not the catalytically active form of and supports the direct involvement of the catalyst , with complex being a probable key intermediate in the catalytic reaction.
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Affiliation(s)
- Shrikant M Khake
- Organometallic Synthesis and Catalysis Group, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune - 411 008, Maharashtra, India.
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26
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Salah A, Corpet M, ul-Hassan Khan N, Zargarian D, Spasyuk DM. Synthesis of unsymmetrical 5,6-POCOP′-type pincer complexes of nickel(ii): impact of nickelacycle size on structures and spectroscopic properties. NEW J CHEM 2015. [DOI: 10.1039/c5nj00807g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different structures and reactivities observed with the unsymmetrical (5,6-POCOP) and symmetrical (5,5-POCOP) pincer complexes of Ni(ii) underline the importance of the metallacycle ring size and its degree of flexibility.
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Affiliation(s)
- Abderrahmen Salah
- Département de chimie
- Université de Montréal
- Montréal (Québec)
- Canada H3C 3J7
| | - Martin Corpet
- Département de chimie
- Université de Montréal
- Montréal (Québec)
- Canada H3C 3J7
| | | | - Davit Zargarian
- Département de chimie
- Université de Montréal
- Montréal (Québec)
- Canada H3C 3J7
| | - Denis M. Spasyuk
- Département de chimie
- Université de Montréal
- Montréal (Québec)
- Canada H3C 3J7
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27
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Cloutier JP, Vabre B, Moungang-Soumé B, Zargarian D. Synthesis and Reactivities of New NCN-Type Pincer Complexes of Nickel. Organometallics 2014. [DOI: 10.1021/om5010176] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Boris Vabre
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | | | - Davit Zargarian
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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Hao J, Vabre B, Zargarian D. POCOP-Ligated Nickel Siloxide Complexes: Syntheses, Characterization, and Reactivities. Organometallics 2014. [DOI: 10.1021/om500916d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jingjun Hao
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Boris Vabre
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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29
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Mougang-Soumé B, Belanger-Gariépy F, Zargarian D. Synthesis, Characterization, and Oxidation of New POCNimine-Type Pincer Complexes of Nickel. Organometallics 2014. [DOI: 10.1021/om500529e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | | | - Davit Zargarian
- Department of Chemistry, Université de Montréal, Montreal, Quebec, Canada
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30
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Kita MR, Miller AJM. Cation-Modulated Reactivity of Iridium Hydride Pincer-Crown Ether Complexes. J Am Chem Soc 2014; 136:14519-29. [DOI: 10.1021/ja507324s] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew R. Kita
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, 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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31
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Hao J, Vabre B, Mougang-Soumé B, Zargarian D. Small molecule activation by POC(sp3)OP-nickel complexes. Chemistry 2014; 20:12544-52. [PMID: 25145857 DOI: 10.1002/chem.201402933] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 12/13/2022]
Abstract
This contribution describes the reactivities of CO2 , CO, O2 , and ArNC with the pincer-type complexes [(κ(P) ,κ(C) ,κ(P') -POC sp 3OP)NiX] (POC sp 3OP=(R2 POCH2 )2 CH; R=iPr; X=OSiMe3 , NArH; Ar=2,6-iPr2 C6 H3 ). Reaction of the amido derivative with CO2 and CO leads to a simple insertion into the NiN bond to give stable carbamate and carbamoyl derivatives, respectively, the pincer ligand backbone remaining intact in both cases. In contrast, the analogous reactions with the siloxide derivative produced kinetically labile insertion products that either revert to the starting material (in the case of CO2 ) or react further to give the mixed-valent, dinickel species [(POC sp 3OP)Ni(II) {μ,κ(O) ,κ(P) ,κ(P') -OCOCH(CH2 CH2 OPR2 )2 }Ni(0) (CO)2 ]. The zero-valent center in the latter compound is ligated by a new ligand arising from transformation of the POC sp 3OP ligand backbone. The carbonylation and carboxylation of the siloxido derivative also produced minor quantities of a side-product identified as the trinickel species, [{(η(3) -allyl)Ni(μ(O) ,κ(P) -R2 PO)2 }2 Ni], arising from total dismantling of the POC sp 3OP ligand. Similar reactivities were observed with isonitrile, ArNC: reaction with the siloxido derivative resulted in a complex sequence of steps involving initial insertion, a 1,3-hydrogen shift, and an Arbuzov rearrangement to give [Ni(CNAr)4 ] and a methacrylamide based on fragments of the POC sp 3OP ligand. Oxygenation of the amido and siloxido derivatives led to the phosphinate derivative, [(POC sp 3OP)Ni(OP(O)R2 )], arising from oxidative transformation of the original ligand frame; the reaction with the Ni-NHAr derivative also gave ArHNP(O)R2 through a complex NP bond-forming reaction.
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Affiliation(s)
- Jingjun Hao
- Département de chimie, Université de Montréal, 2900 Boul. Edouard-Montpetit, Montréal, Québec, H3C 3 J7 (Canada)
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Vabre B, Petiot P, Declercq R, Zargarian D. Fluoro and Trifluoromethyl Derivatives of POCOP-Type Pincer Complexes of Nickel: Preparation and Reactivities in SN2 Fluorination and Direct Benzylation of Unactivated Arenes. Organometallics 2014. [DOI: 10.1021/om500472b] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Boris Vabre
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Pauline Petiot
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Richard Declercq
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Davit Zargarian
- Department
of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
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33
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Hao J, Mougang-Soumé B, Vabre B, Zargarian D. On the Stability of a POCsp3OP-Type Pincer Ligand in Nickel(II) Complexes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310386] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Hao J, Mougang-Soumé B, Vabre B, Zargarian D. On the Stability of a POCsp3OP-Type Pincer Ligand in Nickel(II) Complexes. Angew Chem Int Ed Engl 2014; 53:3218-22. [DOI: 10.1002/anie.201310386] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Indexed: 11/10/2022]
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35
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Venkanna GT, Tammineni S, Arman HD, Tonzetich ZJ. Synthesis, Characterization, and Catalytic Activity of Ni(II) Alkyl Complexes Supported by Pyrrole-Diphosphine Ligands. Organometallics 2013; 32:4656-4663. [PMID: 24567662 PMCID: PMC3931010 DOI: 10.1021/om400630q] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The organometallic Ni(II) chemistry of the pyrrole-based pincer ligands, (P2RPyr)- (P2RPyr = 2,5-(R2PCH2)2C4H2N, R = Ph or Cy) is reported. Reactions of Grignard reagents with [NiCl(P2R Pyr)] afford a variety of alkyl and aryl complexes (methyl, ethyl, benzyl, phenyl, and allyl) that all display square planar geometries about nickel. The hydride complex, [NiH(P2CyPyr)], can also prepared either through treatment of [NiCl(P2CyPyr)] with LiHBEt3, or by reaction of H(P2RPyr) with [Ni(COD)2] (COD = 1,4-cyclooctadiene). Reactions of the methyl and hydride complexes with CO and CO2, respectively, evince clean migratory insertion chemistry of the Ni-C and Ni-H bonds. Both the alkyl and chloride complexes are active catalysts for the Kumada coupling of aryl chlorides and aryl or alkyl Grignard reagents at room temperature. The solid-state structures of several of the complexes are reported.
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Affiliation(s)
| | - Swetha Tammineni
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249
| | - Hadi D. Arman
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249
| | - Zachary J. Tonzetich
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249
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36
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37
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Vabre B, Spasyuk DM, Zargarian D. Impact of Backbone Substituents on POCOP-Ni Pincer Complexes: A Structural, Spectroscopic, and Electrochemical Study. Organometallics 2012. [DOI: 10.1021/om3009475] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Boris Vabre
- Département
de Chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| | - Denis M. Spasyuk
- Département
de Chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| | - Davit Zargarian
- Département
de Chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
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38
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Kumar S, Mani G, Mondal S, Chattaraj PK. Pyrrole-based new diphosphines: Pd and Ni complexes bearing the PNP pincer ligand. Inorg Chem 2012; 51:12527-39. [PMID: 23137009 DOI: 10.1021/ic301967r] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new class of diphosphine PNP pincer ligand, 2,5-bis(diphenylphosphinomethyl)pyrrole 2, was synthesized by the reaction between Ph2PH and 2,5-bis(dimethylaminomethyl)pyrrole in 90% yield. The analogous reaction of Ph2PH with 1,9-bis(dimethylaminomethyl)diphenyldipyrrolylmethane readily afforded a PNNP type diphosphine ligand, 1,9-bis(diphenylphosphinomethyl)diphenyldipyrrolylmethane 5 in 92% yield. These phosphine compounds were oxidized with H2O2 and S8 to give the corresponding phosphoryl and thiophosphoryl compounds 6-9 in very good yields. The reaction of the PNP pincer ligand 2 with [PdCl2(PhCN)2] in the presence of Et3N afforded the mononuclear Pd(II) complex, [PdCl{C4H2N-2,5-(CH2PPh2)2-κ(3)PNP}] 10 in 87% yield. Conversely, treatment of 2 with [PdCl2(PhCN)2] in the absence of Et3N gave the dinuclear Pd(II) complex [Pd2Cl4{μ-C4H3N-2,5-(CH2PPh2)2-κ(2)PP}2], the structure which is proposed based on the spectroscopic data. When 2 was treated with Pd(0) precursor [Pd2(dba)3]·CHCl3 the dinuclear Pd(I) complex [Pd2{μ-C4H2N-2,5-(CH2PPh2)2-κ(2)PN,κ(1)P}2], 12, was obtained in 23% yield. The formation of complex 12 is solvent dependent, which transforms into complex 10 in CDCl3 as studied by variable temperature (1)H and (31)P NMR methods. Treatment of 2 with [Ni(OAc)2]·4H2O gave the mononuclear Ni(II) pincer complex [Ni(OAc){C4H2N-2,5-(CH2PPh2)2-κ(3)PNP}], 13, which upon treatment with an excess of LiCl or LiBr or KI afforded the respective halide ion substituted Ni(II) complexes, [NiX{C4H2N-2,5-(CH2PPh2)2-κ(3)PNP}] (X = Cl, Br, and I), 14-16, in very good yields. The structures of 5, 2,5-bis(diphenylphosphorylmethyl)pyrrole 6, 10, 12, and 14-16 were determined by the single crystal X-ray diffraction method. In the structure of 12, two short contacts between the diagonally positioned Pd and P atoms are observed. To understand these weak interactions, density functional theory (DFT) calculations were done and an interaction MO diagram is presented.
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Affiliation(s)
- Shanish Kumar
- Department of Chemistry, Indian Institute of Technology , Kharagpur, India 721 302
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39
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Grüger N, Wadepohl H, Gade LH. A readily accessible PNP pincer ligand with a pyrrole backbone and its Ni(I/II) chemistry. Dalton Trans 2012; 41:14028-30. [PMID: 23104555 DOI: 10.1039/c2dt32199h] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel chelating PNP pincer ligand 2,5-bis((diphenylphosphino)methyl)-1H-pyrrole (1) was prepared and its nickel coordination chemistry explored. The reaction with Ni(COD)(2) led to a diamagnetic dinuclear nickel(I) complex (4) which was also obtained by the reaction of the square planar Ni(II) complexes [(PNP-Ph(2))NiX] (X = Cl (2), X = I (3)) with Li(Et(3)BH).
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Affiliation(s)
- Nora Grüger
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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40
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Vabre B, Canac Y, Duhayon C, Chauvin R, Zargarian D. Nickel(II) complexes of the new pincer-type unsymmetrical ligands PIMCOP, PIMIOCOP, and NHCCOP: versatile binding motifs. Chem Commun (Camb) 2012; 48:10446-8. [PMID: 22990128 DOI: 10.1039/c2cc35377f] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chelation/nickellation of an unsymmetrical meta-phenylene-based ligand featuring phosphinite and imidazolophosphine functionalities gives the corresponding pincer complex. N-Methylation of the latter generates a new complex featuring the ternary moiety NHC→Ph(2)P(+)→Ni, which can be converted subsequently into the binary moiety NHC→Ni by extrusion of Ph(2)P(+), thus allowing a sequential synthesis of pincer complexes displaying varying degrees of dipolar character.
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Affiliation(s)
- Boris Vabre
- Département de chimie, Université de Montréal, C. P. 6128, Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
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41
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Vabre B, Lambert ML, Petit A, Ess DH, Zargarian D. Nickelation of PCP- and POCOP-Type Pincer Ligands: Kinetics and Mechanism. Organometallics 2012. [DOI: 10.1021/om3003784] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Boris Vabre
- Département
de chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| | - Melinda L. Lambert
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah
84602, United
States
| | - Alban Petit
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah
84602, United
States
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah
84602, United
States
| | - Davit Zargarian
- Département
de chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
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42
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Ghorai D, Kumar S, Mani G. Mononuclear, helical binuclear palladium and lithium complexes bearing a new pyrrole-based NNN-pincer ligand: fluxional property. Dalton Trans 2012; 41:9503-12. [DOI: 10.1039/c2dt30816a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Liang LC, Lee WY, Hung YT, Hsiao YC, Cheng LC, Chen WC. Nickel complexes incorporating an amido phosphine chelate with a pendant amine arm: Synthesis, structure, and catalytic Kumada coupling. Dalton Trans 2012; 41:1381-8. [DOI: 10.1039/c1dt11338k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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44
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Zhang J, Adhikary A, King KM, Krause JA, Guan H. Substituent effects on Ni–S bond dissociation energies and kinetic stability of nickel arylthiolate complexes supported by a bis(phosphinite)-based pincer ligand. Dalton Trans 2012; 41:7959-68. [DOI: 10.1039/c2dt30407d] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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45
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Salah AB, Offenstein C, Zargarian D. Hydroamination and Alcoholysis of Acrylonitrile Promoted by the Pincer Complex {κP,κC,κP-2,6-(Ph2PO)2C6H3}Ni(OSO2CF3). Organometallics 2011. [DOI: 10.1021/om200549p] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Caroline Offenstein
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Davit Zargarian
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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46
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Salah AB, Zargarian D. The impact of P-substituents on the structures, spectroscopic properties, and reactivities of POCOP-type pincer complexes of nickel(ii). Dalton Trans 2011; 40:8977-85. [DOI: 10.1039/c1dt10381d] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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