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On the mechanism of intermolecular nitrogen-atom transfer from a lattice-isolated diruthenium nitride intermediate

Journal Article · · Faraday Discussions
DOI:https://doi.org/10.1039/d2fd00167e· OSTI ID:1909455
 [1];  [2];  [3];  [3];  [4];  [4];  [3]
  1. Texas A & M Univ., College Station, TX (United States); Univ. North Texas
  2. Univ. of North Texas, Denton, TX (United States). Center for Advanced Scientific Computing and Modeling (CASCaM); University of Jeddah (Saudi Arabia)
  3. Texas A & M Univ., College Station, TX (United States)
  4. Univ. of North Texas, Denton, TX (United States). Center for Advanced Scientific Computing and Modeling (CASCaM)
Catalyst confinement within microporous media provides the opportunity to site isolate reactive intermediates, enforce intermolecular functionalization chemistry by co-localizing reactive intermediates and substrates in molecular-scale interstices, and harness non-covalent host–guest interactions to achieve selectivities that are complementary to those accessible in solution. As part of an ongoing program to develop synthetically useful nitrogen-atom transfer (NAT) catalysts, we have demonstrated intermolecular benzylic amination of toluene at a Ru2 nitride intermediate confined within the interstices of a Ru2-based metal–organic framework (MOF), Ru3(btc)2X3 (btc = 1,3,5-benzenetricarboxylate, i.e., Ru-HKUST-1 for X = Cl). Nitride confinement within the extended MOF lattice enabled intermolecular C–H functionalization of benzylic C–H bonds in preference to nitride dimerization, which was encountered with soluble molecular analogues. Detailed study of the kinetic isotope effects (KIEs, i.e., kH/kD) of C–H amination, assayed both as intramolecular effects using partially labeled toluene and as intermolecular effects using a mixture of per-labeled and unlabeled toluene, provided evidence for restricted substrate mobility on the time scale of interstitial NAT. Analysis of these KIEs as a function of material mesoporosity provided approximate experimental values for functionalization in the absence of mass transport barriers. Here, we disclose a combined experimental and computational investigation of the mechanism of NAT from a Ru2 nitride to the C–H bond of toluene. Computed kinetic isotope effects for a H-atom abstraction (HAA)/radical rebound (RR) mechanism are in good agreement with experimental data obtained for C–H amination at the rapid diffusion limit. These results provide the first detailed analysis of the mechanism of intermolecular NAT to a C–H bond, bolster the use of KIEs as a probe of confinement effects on NAT within MOF lattices, and provide mechanistic insights unavailable by experiment because rate-determining mass transport obscured the underlying chemical kinetics.
Research Organization:
Texas A & M University, College Station, TX (United States); Univ. of North Texas, Denton, TX (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
FG02-03ER15387; SC0018977
OSTI ID:
1909455
Alternate ID(s):
OSTI ID: 2433864
OSTI ID: 1971537
Journal Information:
Faraday Discussions, Journal Name: Faraday Discussions Vol. 244; ISSN 1359-6640
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (55)

Diffusion in a pore of varying cross section journal September 1958
Unusual Reaction Pathways in the Photolysis of Diazido(phosphane)nickel(II) Complexes: Nitrenes As Intermediates in the Formation of Nickel(0) Complexes journal March 1997
Delocalized Metal-Metal and Metal-Ligand Multiple Bonding in a Linear RuRuN Unit: Elongation of a Traditionally Short RuN Bond journal December 2008
Ligand-Accelerated Activation of Strong CH Bonds of Alkanes by a (Salen)ruthenium(VI)-Nitrido Complex journal July 2012
Multifunctional, Defect-Engineered Metal-Organic Frameworks with Ruthenium Centers: Sorption and Catalytic Properties journal May 2014
Decay of Iron(V) Nitride Complexes By a NN Bond-Coupling Reaction in Solution: A Combined Spectroscopic and Theoretical Analysis journal May 2014
Probing Substrate Diffusion in Interstitial MOF Chemistry with Kinetic Isotope Effects journal March 2018
Traceless Benzylic C−H Amination via Bifunctional N ‐Aminopyridinium Intermediates journal May 2022
Ruthenium Metal-Organic Frameworks with Different Defect Types: Influence on Porosity, Sorption, and Catalytic Properties journal August 2016
In Operando Analysis of Diffusion in Porous Metal‐Organic Framework Catalysts journal December 2018
Precise Control of Molecular Self‐Diffusion in Isoreticular and Multivariate Metal‐Organic Frameworks journal December 2019
4d vs. 5d – Reactivity and Fate of Terminal Nitrido Complexes of Rhodium and Iridium journal September 2010
Beyond ferryl-mediated hydroxylation: 40 years of the rebound mechanism and C–H activation journal December 2016
The effect of dead-end porosity on rock-matrix diffusion journal September 1985
Immobilizing catalysts on porous materials journal March 2006
Immobilized highly dispersed Ni nanoparticles over porous carbon as an efficient catalyst for selective hydrogenation of furfural and levulinic acid journal December 2021
Transition-Metal-Catalyzed C–N Bond Forming Reactions Using Organic Azides as the Nitrogen Source: A Journey for the Mild and Versatile C–H Amination journal March 2015
Elucidating the Structure of the Metal–Organic Framework Ru-HKUST-1 journal August 2020
Reusable N-Heterocyclic Carbene Complex Catalysts and Beyond: A Perspective on Recycling Strategies journal May 2018
Diffusive Transport in Pores. Tortuosity and Molecular Interaction with the Pore Wall journal June 2017
Recent Advances in Porous Materials for Photocatalytic CO2 Reduction journal January 2022
Post-Transition State Bifurcation in Iron-Catalyzed Arene Aminations journal May 2021
Exploiting Confinement Effects to Tune Selectivity in Cyclooctane Metathesis journal August 2017
Catalysis by Metal Organic Frameworks: Perspective and Suggestions for Future Research journal January 2019
Metalloporphyrin Catalyzed C–H Amination journal March 2019
Metal-Catalyzed Nitrogen-Atom Transfer Methods for the Oxidation of Aliphatic C–H Bonds journal January 2012
Acceleration and selectivity enhancement of Diels-Alder reactions by special and catalytic methods journal March 1993
Mesostructured Hybrid Organic–Silica Materials: Ideal Supports for Well-Defined Heterogeneous Organometallic Catalysts journal April 2014
Localization in trans,trans -[(tpy)(Cl) 2 Os III (N 2 )Os II (Cl) 2 (tpy)] + (tpy = 2,2‘:6‘,2‘‘-Terpyridine) journal December 1997
Adsorption of Branched and Cyclic Paraffins in Silicalite. 2. Kinetics journal January 1995
Relation between Catalytic Activity and Size of Particle journal July 1939
Inter- and Intramolecular Experimental and Calculated Equilibrium Isotope Effects for (silox) 2 ( t Bu 3 SiND)TiR + RH (silox = t Bu 3 SiO):  Inferred Kinetic Isotope Effects for RH/D Addition to Transient (silox) 2 TiNSi t Bu 3 journal August 2000
Highly Electrophilic (Salen)ruthenium(VI) Nitrido Complexes journal January 2004
Aryl C−H Bond Amination by an Electrophilic Diruthenium Nitride journal September 2010
Photolysis and Thermolysis of Bis(imino)pyridine Cobalt Azides: C−H Activation from Putative Cobalt Nitrido Complexes journal November 2010
Electrophilic Aromatic Sulfonation with SO3: Concerted or Classic SEAr Mechanism? journal November 2011
Aryl C–H Amination by Diruthenium Nitrides in the Solid State and in Solution at Room Temperature: Experimental and Computational Study of the Reaction Mechanism journal August 2011
A Concerted Mechanism for Ethane Hydroxylation by the Particulate Methane Monooxygenase from Methylococcus capsulatus (Bath) journal January 1996
Experimental Evidence for Extensive Tunneling of Hydrogen in the Lipoxygenase Reaction:  Implications for Enzyme Catalysis journal January 1996
Transport Phenomena: Challenges and Opportunities for Molecular Catalysis in Metal–Organic Frameworks journal June 2020
Formation of the N≡N Triple Bond from Reductive Coupling of a Paramagnetic Diruthenium Nitrido Compound journal February 2022
Four-Electron Oxidation of Phenols to p -Benzoquinone Imines by a (Salen)ruthenium(VI) Nitrido Complex journal April 2016
Measuring and Modulating Substrate Confinement during Nitrogen-Atom Transfer in a Ru 2 -Based Metal-Organic Framework journal November 2019
N-Aminopyridinium reagents as traceless activating groups in the synthesis of N-Aryl aziridines journal June 2022
Manganese-catalysed benzylic C(sp3)–H amination for late-stage functionalization journal April 2018
Photochemical nitrogenation of alkanes and arenes by a strongly luminescent osmium(VI) nitrido complex journal March 2019
Catalytic C–H functionalization by metalloporphyrins: recent developments and future directions journal January 2011
Immobilized Grubbs catalysts on mesoporous silica materials: insight into support characteristics and their impact on catalytic activity and product selectivity journal January 2016
Major advances in the development of ordered mesoporous materials journal January 2020
MOF-enabled confinement and related effects for chemical catalyst presentation and utilization journal January 2022
Photoredox properties of [OsN(NH3)4]3+ and mechanism of formation of [{Os(NH3)4(CH3CN)}2N2]5+ through a nitrido-coupling reaction journal January 1992
Solvothermal growth of a ruthenium metal–organic framework featuring HKUST-1 structure type as thin films on oxide surfaces journal January 2011
Investigation of the synthesis, activation, and isosteric heats of CO2 adsorption of the isostructural series of metal–organic frameworks M3(BTC)2 (M = Cr, Fe, Ni, Cu, Mo, Ru) journal January 2012
N-Amino pyridinium salts in organic synthesis journal January 2023
Stabilizing reactive intermediates through site isolation journal January 2009


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