Article
Chemistry, Inorganic & Nuclear
Tener F. Jenkins, Samuel Bekoe, Joseph W. Ziller, Filipp Furche, William J. Evans
Summary: The study showed that a C5Me5 complex of Y(II) could be isolated, and a mixture of Y(II) and Y(III) complexes was observed, with methyl groups on the SiMe3 substituent activating C-H bonds.
Article
Chemistry, Inorganic & Nuclear
Amy N. Price, Ankur K. Gupta, Wibe A. de Jong, Polly L. Arnold
Summary: The chemistry of the tris-carbene anion phenyltris(3-alkyl-imidazoline-2-yliden-1-yl)borate, [C3(Me)](-) ligand, for f-block metal cations was investigated. Neutral, molecular complexes were formed for cerium(iii), while a separated ion pair was formed for ytterbium(iii). Computational analyses demonstrated the stronger s donation and greater covalency in the metal-carbon bonds of the [C3(Me)](-) complexes compared to the Tp(Me,Me) complexes. DFT calculations confirmed the crucial role of THF solvent in accurately reproducing the observed molecular and ion-pair geometries for the Ce and Yb complexes.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Tobias J. Sherbow, Keyan Li, Lev N. Zakharov, Michael D. Pluth
Summary: This paper investigates the coordination chemistry of the [B-Ph((t)BuIm)(3)](1-) ligand with redox-inert zinc and explores the behavior of the zinc metal center in a strong coordinating environment. Different zinc coordination complexes with various ligand substitutions were obtained through a series of reactions.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Sofia Friaes, Sara Realista, Clara S. B. Gomes, Paulo N. Martinho, Luis F. Veiros, Martin Albrecht, Beatriz Royo
Summary: New manganese complexes with di-triazolylidene ligands display different ligand coordination modes, bridging and chelating, depending on the substituents and synthetic procedure. The structures of monometallic and bimetallic complexes were determined by X-ray diffraction studies. Cyclic voltammetry studies indicate reversible redox processes for monometallic Mn(i) complexes and a quasi-reversible EC mechanism for the oxidation of bimetallic complexes.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Sabari Panchavarnam, Rima Sengupta, Mangalampalli Ravikanth
Summary: A new ligand was designed and synthesized in two steps, which involved reactions, treatment with Lewis acid, and recrystallization processes, leading to the formation of a novel bispalladium complex that can act as an efficient catalyst.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jueri Sekiguchi, Yugo Kazama, Akihiko Ishii, Norio Nakata
Summary: We investigated the reactions of an iminophosphonamido-silylene with different palladium complexes. The reaction with [Pd(PPh3)(4)] yielded a homoleptic tris(silylene)-palladium(0) complex. Surprisingly, the reaction with [PdMe2(tmeda)] resulted in the formation of a novel non-planar mu(3)-silylyne-bridged tetranuclear palladium cluster with palladium atoms in different oxidation states.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhilin Hou, Allison S. S. Vanecek, Jetze J. J. Tepe, Aaron L. L. Odom
Summary: A structurally characterized metal quinoline complex was prepared using a quinoline-based proteasome inhibitor (Quin1). The kinetics of quinoline displacement and reactivity with deuterated solvents were investigated. It was found that quinolines with more methyl groups on the arene are more kinetically stable.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Qingqing Wen, Thayalan Rajeshkumar, Laurent Maron, Xuebing Leng, Yaofeng Chen
Summary: The first rare-earth metal complex bearing both hydrido- and imido-ligands, a hydrido- and imido-bridged dinuclear ytterbium(III) complex, was successfully synthesized via an unprecedented redox reaction. DFT calculation revealed that the N-2 release from azido compound in the presence of ytterbium(II) is kinetically facile due to cooperative effects. The reactivity investigation of the complex demonstrated redox, addition, and sigma-bond metathesis reactivities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Peng Deng, Xianghui Shi, Xun Gong, Jianhua Cheng
Summary: The successful preparation of scandium methylidyne complexes free of Lewis acids demonstrates their rich chemical properties and flexibility to incorporate organic substrates.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Matteo Bevilacqua, Marco Roverso, Sara Bogialli, Claudia Graiff, Andrea Biffis
Summary: We report a new method for synthesizing phosphine (PR3) and di-N-heterocyclic carbene (di-NHC) ligand stabilized molecular gold nanoclusters (AuNCs). The reaction of di-NHC gold(I) complexes with [Au11(PPh3)8Cl2]Cl clusters results in the formation of three new classes of AuNCs through a controllable reaction sequence. The electronic and steric properties of the di-NHC ligand affect the product distribution, leading to the isolation and characterization of different clusters. One of the characterized clusters shows strong emission in solution.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mark D. Straub, Erik T. Ouellette, Michael A. Boreen, R. David Britt, Khetpakorn Chakarawet, Iskander Douair, Colin A. Gould, Laurent Maron, Iker Del Rosal, David Villarreal, Stefan G. Minasian, John Arnold
Summary: The paragraph translated above discusses the reduction reactions of U(III) and Th(IV) metal complexes with KC8, analyzing the structures and reactivity of the resulting products.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Joseph W. Ziller, William J. Evans
Summary: In this study, the U(v) imido complex 1 was observed for the first time by crystallography, providing new insights into the reaction mechanisms of U(III) compounds with azide reagents.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Tobias J. Sherbow, Lev Zakharov, Michael D. Pluth
Summary: Recent studies have shown that metal-sulfur coordination compounds can regulate reactive sulfur species (RSS) transport. The reaction of B-Ph-((t)BuIm)(3)NiCl with RSS leads to the formation of square planar complexes through protonation of a carbene ligand donor atom. Mechanistic investigation suggest that protonation may occur from the decomposition of reactants, interactions with favorable counterions, or generation of transient unidentified RSS.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Prasenjit Sarkar, Amrit Sarmah, Chandan Mukherjee
Summary: The study presents the first crystallographic example of a stable complex with two different types of radicals co-existing, with the geometry and electronic structure of the complex determined through X-ray crystallography, magnetic and EPR measurements, and density functional theory calculations.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Takako Muraoka, Yuzuki Suzuki, Masato Tsuchimoto, Gama Trigagema, Keiji Ueno, Shinji Koyama
Summary: This article investigates the stabilization methods of silanones and the synthesis and reactions of pyridine-stabilized silanone complexes, revealing their structures and properties, providing important experimental data for the study of silanones.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Conrad A. P. Goodwin, Sierra R. Ciccone, Samuel Bekoe, Sourav Majumdar, Brian L. Scott, Joseph W. Ziller, Andrew J. Gaunt, Filipp Furche, William J. Evans
Summary: New coordination environments for Np(III) and Pu(III) are reported based on pilot studies, with U(III) also studied in the same context. Complexes obtained through reactions showed different electron configurations for U(III), Np(III), and Pu(III).
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Joseph W. Ziller, Filipp Furche, William J. Evans
Summary: Heteroleptic U(III) complexes supported by bis(cyclopentadienyl) frameworks were synthesized and evaluated as precursors to U(II) complexes. The complexes were compared with other related compounds, and their electrochemical behavior was studied, revealing redox couples for U(IV)/U(III) and U(III)/U(II) transitions. The targeted U(II) complexes were analyzed using density functional theory, showing a 5f(3)6d(1) electron configuration as the ground state in each case.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Krishnendu Kundu, Jessica R. K. White, Samuel A. Moehring, Jason M. Yu, Joseph W. Ziller, Filipp Furche, William J. Evans, Stephen Hill
Summary: By controlling the degree of s-orbital mixing in molecules, a large spin hyperfine interaction can be achieved, leading to a 9 GHz clock transition and increased phase memory time. These findings suggest new strategies for the development of molecular quantum technologies.
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Joseph W. Ziller, William J. Evans
Summary: This study found that 1,3,5-trimethyltriazacyclohexane readily adds to bismuth triiodide to form various coordination compounds with different structures and properties, depending on the stoichiometry, solvent, and crystallization conditions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Lauren M. Anderson-Sanchez, Jason M. Yu, Joseph W. Ziller, Filipp Furche, William J. Evans
Summary: The sterically bulky aryloxide ligand OAr* has been used to synthesize thermally stable Ln(II) complexes across the lanthanide series. Reduction of Ln(III) precursors Ln(OAr*)3 with potassium graphite and 2.2.2-cryptand yielded the Ln(II) complexes. The La and Ce complexes were challenging to isolate but could be obtained with the use of 18-crown-6 as a potassium chelator.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Jesse Murillo, Joseph W. Ziller, Brian L. Scott, Andrew J. Gaunt, William J. Evans
Summary: Me3tach readily complexes uranium triiodide to form (Me3tach)2UI3, which is soluble in THF and arenes and can serve as a source of UI3 to form organometallic U(III) complexes. When dissolved in pyridine, (Me3tach)2UI3 forms (Me3tach)UI3(py)2. A comparison was made with a related complex (Me3tacn)UI3(THF) using the larger ligand Me3tacn. Neptunium and plutonium complexes (Me3tach)2NpI3 and (Me3tach)2PuI3 were synthesized in a similar manner.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Amanda B. Chung, Cary R. Stennett, William N. G. Moore, Ming Fang, Joseph W. Ziller, William J. Evans
Summary: The reduction of tris(amide) complexes Ln(NR2)3 (R = SiMe3) with potassium graphite in the presence of various ethers demonstrates high reactivity, as shown by crystal structures of different C-O bond cleavage reactions. The study also highlights the diverse reaction pathways and difficulties in isolating Ln(II) complexes containing the [Ln(NR2)3]1- anion.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Cary R. Stennett, Joseph Q. Nguyen, Joseph W. Ziller, William J. Evans
Summary: The feasibility of using redox-active 2,2'-bipyridine as an electron carrier for lanthanide metallocenes was examined. The synthesis and characterization of Cp*2LnCl-(bipy) and Cp*2Ln(bipy) complexes were carried out. The complexes were then used to achieve two-electron reduction chemistry, including the reduction of azobenzene and the formation of lanthanide organometallic complexes with a (S5)2- ligand.
Article
Nanoscience & Nanotechnology
William N. G. Moore, Timothy J. McSorley, Alexandre Vincent, Joseph W. Ziller, Luis A. Jauregui, William J. Evans
Summary: The utility of molecular precursors for constructing van der Waals heterostructures was explored by studying the compound [(THF)Cs(mu- eta 5:eta 5-Cp ')3TmII]. Thin films were successfully exfoliated from single crystals and stacked under hexagonal boron nitride to create an air-stable van der Waals heterostructure.
ACS APPLIED NANO MATERIALS
(2023)
Editorial Material
Public, Environmental & Occupational Health
Amanda B. B. Chung, Cy H. Fujimoto, William J. Evans
Summary: We present a narrative of an incident in a chemistry laboratory involving the purification of benzene using a distillation apparatus. The incident resulted in an injury to a graduate student and a fire causing $3.5 million in damages. Unfortunately, due to the extent of the fire, the direct cause of the incident could not be determined. Lessons learned from this incident include conducting risk assessments, maintaining proper lab housekeeping, updating chemical inventory, monitoring long duration experiments, calling for backup, ensuring compliance with building codes, wearing personal protective equipment, and always calling 911 during emergencies.
ACS CHEMICAL HEALTH & SAFETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Cory J. Windorff, Conrad A. P. Goodwin, Joseph M. Sperling, Thomas E. Albrecht-Schonzart, Zhuanling Bai, William J. Evans, Zachary K. Huffman, Renaud Jeannin, Brian N. Long, David P. Mills, Todd N. Poe, Joseph W. Ziller
Summary: This study aimed to find a trivalent plutonium halide phosphine oxide compound but accidentally isolated a tetravalent plutonium halide compound, which was characterized using various techniques. A putative plutonyl complex was also observed, and a series of similar compounds were synthesized for comparison.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Joseph Q. Nguyen, Lauren M. Anderson-Sanchez, William N. G. Moore, Joseph W. Ziller, Filipp Furche, William J. Evans
Summary: The importance of the specific trialkylsilyl substituent in the cyclopentadienyl chemistry of C5H4SiR3 ligands has been demonstrated by the synthesis of low oxidation-state thorium complexes. Crystalline tris(monosilyl-substituted cyclopentadienyl) Th(III) and Th(II) complexes can be isolated when the substituent is isopropyl.
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Joseph W. Ziller, William J. Evans
Summary: The reactions of 1,3,5-trimethyl-triazacyclohexane with rare-earth metal iodide, chloride, and triflate salts were investigated as alternative precursors for THF-free reactions. These reactions produced soluble (Me(3)tach)(2)LnI(3) and (Me(3)tach)(2)LnCl3 complexes with unique structures.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Justin C. Wedal, Joseph W. Ziller, William J. Evans
Summary: In this study, the U(v) imido complex 1 was observed for the first time by crystallography, providing new insights into the reaction mechanisms of U(III) compounds with azide reagents.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Justin C. Wedal, Nathalia Cajiao, Michael L. Neidig, William J. Evans
Summary: A new synthesis of Th(ii) complexes has been discovered, which involves the addition of simple MX salts to Cp'' Th-3(III) in the presence of 18-crown-6 or 2.2.2-cryptand. This synthesis method is applicable to MX salts where M is Li, Na, K and X is H, Cl, Me, N-3.
CHEMICAL COMMUNICATIONS
(2022)