1
|
Newman-Stonebraker SH, Raab TJ, Doyle AG. Catalyst Deactivation of a Monoligated CyJohnPhos-bound Nickel(0) Complex. Organometallics 2023; 42:3438-3441. [PMID: 39015779 PMCID: PMC11250466 DOI: 10.1021/acs.organomet.3c00450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
Cross-coupling catalysts are prone to unproductive side reactivity that can limit their practical use in synthetic chemistry. A detailed understanding of these pathways and the conditions that enable them is important for reaction optimization and rational catalyst design. In this work, we report the off-cycle reactivity of a monoligated, CyJohnPhos-bound Ni0 complex following product-forming reductive elimination. In the absence of substrate, free phosphine ligand, or π-accepting additives, dimerization of (CyJohnPhos)Ni0 occurs, followed by C-P bond activation of the ligand to form a phosphido-bridged Ni0/NiII dimer; both the Ni0/Ni0 and Ni0/NiII dimers were structurally characterized. Monomeric (CyJohnPhos)Ni0 must be intercepted by substrate or free ligand to prevent irreversible dimerization and catalyst deactivation.
Collapse
Affiliation(s)
- Samuel H. Newman-Stonebraker
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, USA
| | - T. Judah Raab
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, USA
| | - Abigail G. Doyle
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, USA
| |
Collapse
|
2
|
Huerfano IJ, Laskowski CA, Pink M, Carta V, Hillhouse GL, Caulton KG, Smith JM. Redox-Neutral Transformations of Carbon Dioxide Using Coordinatively Unsaturated Late Metal Silyl Amide Complexes. Inorg Chem 2022; 61:20986-20993. [PMID: 36516978 DOI: 10.1021/acs.inorgchem.2c03453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Two-coordinate silylamido complexes of nickel and copper rapidly react with CO2 to selectively form a new cyanate ligand along with hexamethyldisiloxane byproducts. Mechanistic insight into these reactions was obtained from the synthesis of proposed intermediates, several silyl- and phenyl- substituted amido analogues, and their subsequent reactivity with CO2. These studies suggest that a unique intramolecular double silyl transfer step facilitates CO2 deoxygenation, which likely contributes to the rapid rates of reaction. The deoxygenation reactions create a platform for a synthetic cycle in which copper amido complexes convert CO2 to organic silylcarbamates.
Collapse
Affiliation(s)
- I J Huerfano
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Carl A Laskowski
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Maren Pink
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Veronica Carta
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Gregory L Hillhouse
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Kenneth G Caulton
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Jeremy M Smith
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| |
Collapse
|
3
|
Murueta‐Cruz BA, Berlanga‐Vázquez A, Martínez‐Otero D, Benitez LN, Castillo I, Mondragón‐Díaz A. Planar or Bent? Redox Modulation of Hydrogenase Bimetallic Models by the [Ni
2
(μ‐SAr)
2
] Core Conformation. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Brenda A. Murueta‐Cruz
- Departamento de Química Facultad de Ciencias Universidad del Valle Ciudad Universitaria Meléndez Calle 13 # 100-00 Cali Colombia
| | - Armando Berlanga‐Vázquez
- Instituto de Química Universidad Nacional Autónoma de México Ciudad Universitaria 04510 Ciudad de México México
| | - Diego Martínez‐Otero
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM Carretera Toluca-Atlacomulco km 14.5 Toluca 50200 Estado de México México
| | - Luis Norberto Benitez
- Departamento de Química Facultad de Ciencias Universidad del Valle Ciudad Universitaria Meléndez Calle 13 # 100-00 Cali Colombia
| | - Ivan Castillo
- Instituto de Química Universidad Nacional Autónoma de México Ciudad Universitaria 04510 Ciudad de México México
| | - Alexander Mondragón‐Díaz
- Departamento de Química Facultad de Ciencias Universidad del Valle Ciudad Universitaria Meléndez Calle 13 # 100-00 Cali Colombia
| |
Collapse
|
4
|
Berkefeld A, Roemelt M, Römelt C, Schubert H, Jeschke G. Modulating Effect of Ligand Charge on the Electronic Properties of 2Ni-2S Structures and Implications for Biological 2M-2S Sites. Inorg Chem 2020; 59:17234-17243. [PMID: 33202137 DOI: 10.1021/acs.inorgchem.0c02467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sulfur-bridged bimetallic 2M-2S type structures are essential cofactors that participate in biological long-range electron transport and metabolism. Metal-sulfur bond covalency is a decisive property for inner sphere (through-bond) type electron transfer that dominates in buried or hydrophobic protein environments. This work reports on a combined experimental and computational study of the effect of ligand charge on the electronic structure of a 2Ni-2S model site that adopts the biologically relevant S = 1/2 redox state. Starting out from an isostructural dinickel(1.5+)-dithiophenolate platform with sulfur-bridged tetrahedral Ni sites, η2:η2-μ-coordination of the S = 1/2 [2Ni-2S]+ core to either a neutral π-system or strongly σ-donating cyclohexadienido renders its electronic structure substantially different. Density functional theory analysis corroborates pulse and continuous wave electron paramagnetic resonance data that associate co-ligand charge with the significant change in the mechanism and size of electron-31P nuclear spin hyperfine coupling to a phosphine reporter ligand at each nickel center. An increasing level of charge donation attenuates direct and through-bridge electronic coupling of the metal sites, resulting in a stronger electronic coupling of the 2Ni-2S core to its terminal phosphine donors. Drawing a connection to biological 2M-2S sites, our 2Ni-2S system indicates that a fine balance of intracore and core-protein electronic coupling is key to biological function for which the degree of charge donation by peripheral donors appears to be a significant parameter.
Collapse
Affiliation(s)
- Andreas Berkefeld
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Michael Roemelt
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Christina Römelt
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| |
Collapse
|
5
|
Mondragón-Díaz A, Robles-Marín E, Murueta-Cruz BA, Aquite JC, Martínez-Alanis PR, Flores-Alamo M, Aullón G, Benítez LN, Castillo I. Conformational Effects of [Ni 2 (μ-ArS) 2 ] Cores on Their Electrocatalytic Activity. Chem Asian J 2019; 14:3301-3312. [PMID: 31400087 DOI: 10.1002/asia.201901037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Indexed: 11/11/2022]
Abstract
Two nickel complexes supported by tridentate NS2 ligands, [Ni2 (κ-N,S,S,S'-NPh {CH2 (MeC6 H2 R')S}2 )2 ] (1; R'=3,5-(CF3 )2 C6 H3 ) and [Ni2 (κ-N,S,S,S'-NiBu {CH2 C6 H4 S}2 )2 ] (2), were prepared as bioinspired models of the active site of [NiFe] hydrogenases. The solid-state structure of 1 reveals that the [Ni2 (μ-ArS)2 ] core is bent, with the planes of the nickel centers at a hinge angle of 81.3(5)°, whereas 2 shows a coplanar arrangement between both nickel(II) ions in the dimeric structure. Complex 1 electrocatalyzes proton reduction from CF3 COOH at -1.93 (overpotential of 1.04 V, with icat /ip ≈21.8) and -1.47 V (overpotential of 580 mV, with icat /ip ≈5.9) versus the ferrocene/ferrocenium redox couple. The electrochemical behavior of 1 relative to that of 2 may be related to the bent [Ni2 (μ-ArS)2 ] core, which allows proximity of the two Ni⋅⋅⋅Ni centers at 2.730(8) Å; thus possibly favoring H+ reduction. In contrast, the planar [Ni2 (μ-ArS)2 ] core of 2 results in a Ni⋅⋅⋅Ni distance of 3.364(4) Å and is unstable in the presence of acid.
Collapse
Affiliation(s)
- Alexander Mondragón-Díaz
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Elvis Robles-Marín
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
| | - Brenda A Murueta-Cruz
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Juan C Aquite
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Paulina R Martínez-Alanis
- Departament de Química Inorgánica i Orgànica, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Marcos Flores-Alamo
- Facultad de Química, División de Estudios de Posgrado, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
| | - Gabriel Aullón
- Departament de Química Inorgánica i Orgànica, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Luis Norberto Benítez
- Departamento de Química, Facultad de Ciencias, Universidad del Valle, Ciudad Universitaria Meléndez, Calle 13, Cali, #100-00, Colombia
| | - Ivan Castillo
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico, 04510, Mexico
| |
Collapse
|
6
|
Kim J, Kim YE, Park K, Lee Y. A Silyl-Nickel Moiety as a Metal–Ligand Cooperative Site. Inorg Chem 2019; 58:11534-11545. [DOI: 10.1021/acs.inorgchem.9b01388] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yeong-Eun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Koeun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| |
Collapse
|
7
|
Robles-Marín E, Mondragón A, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Castillo I. Easily reduced bis-pincer ( NS2) 2molybdenum( iv) to ( NHS2) 2Mo( ii) by alcohols vs. redox-inert ( NS2)( NHS2)iron( iii) complexes. Dalton Trans 2018; 47:10932-10940. [DOI: 10.1039/c8dt01562g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Iron and molybdenum complexes supported by a pincer-type dianionic [NS2]2− donor were prepared to compare their structural, spectroscopic, and electrochemical properties.
Collapse
Affiliation(s)
- Elvis Robles-Marín
- Instituto de Química
- Universidad Nacional Autónoma de México
- Circuito Exterior
- CU
- México DF
| | | | - Paulina R. Martínez-Alanis
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Gabriel Aullón
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Marcos Flores-Alamo
- Facultad de Química
- División de Estudios de Posgrado
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- México DF
| | - Ivan Castillo
- Instituto de Química
- Universidad Nacional Autónoma de México
- Circuito Exterior
- CU
- México DF
| |
Collapse
|
8
|
Koch F, Berkefeld A. Reactant or reagent? Oxidation of H2 at electronically distinct nickel-thiolate sites [Ni2(μ-SR)2]+ and [Ni–SR]+. Dalton Trans 2018; 47:10561-10568. [DOI: 10.1039/c8dt00275d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The chemical bond between a Lewis-acidic metal and a Brønsted/Lewis-basic sulphur donor provides M–S structures with functional properties that are relevant for a variety of processes such as the heterolytic cleavage of H2.
Collapse
Affiliation(s)
- Felix Koch
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Andreas Berkefeld
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| |
Collapse
|
9
|
Friedrich J, Qiao Y, Maichle-Mössmer C, Schelter EJ, Anwander R. Redox-enhanced hemilability of a tris(tert-butoxy)siloxy ligand at cerium. Dalton Trans 2018; 47:10113-10123. [DOI: 10.1039/c8dt01878b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Combined structural/electrochemical/computational studies of ceric Ce[OSi(OtBu)3]4 and cerous [Ce{OSi(OtBu)3}4][K(2.2.2-crypt)] suggest a redox-modulated coordination switch of a tris(tert-butoxy)siloxy ligand.
Collapse
Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | | | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Reiner Anwander
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| |
Collapse
|
10
|
Koch F, Berkefeld A, Speiser B, Schubert H. Mechanistic Aspects of Redox-Induced Assembly and Disassembly of S-Bridged [2M-2S] Structures. Chemistry 2017; 23:16681-16690. [PMID: 28976037 DOI: 10.1002/chem.201704599] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Indexed: 11/06/2022]
Abstract
Sulfur-bridged binuclear structures [2M-2S] play a pivotal role in a variety of chemical processes such as bond breaking and formation and electron transfer. In general, structural persistence is deemed essential to the respective function but owing to the lack of a suitable molecular model system, the current understanding of the factors that control the thermodynamic and kinetic stability of [2M-2S] cores clearly is limited. This work reports a series of binuclear complexes of nickel derived from a 1,4-terphenyldithiophenol ligand platform that is ideally suited for mechanistic work to overcome this limitation. Redox-induced assembly and disassembly of S-bridged [2M-2S] fragments have been investigated at the molecular level. As part of an extended square scheme, metastable binuclear structures that are significant mechanistically have been identified, characterized, and their reactivity studied quantitatively. Electronic properties that are inherent to [2M-2S] structures and determine thermodynamic and kinetic stability are differentiated from steric effects imposed by co-ligands.
Collapse
Affiliation(s)
- Felix Koch
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Germany
| | - Andreas Berkefeld
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Germany
| | - Bernd Speiser
- Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Germany
| |
Collapse
|
11
|
Lin CY, Power PP. Complexes of Ni(i): a “rare” oxidation state of growing importance. Chem Soc Rev 2017; 46:5347-5399. [DOI: 10.1039/c7cs00216e] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The synthesis and diverse structures, reactivity (small molecule activation and catalysis) and magnetic properties of Ni(i) complexes are summarized.
Collapse
Affiliation(s)
- Chun-Yi Lin
- Department of Chemistry
- University of California
- Davis
- USA
| | | |
Collapse
|