Article
Biochemistry & Molecular Biology
Philipp M. Rutz, Joerg Grunenberg, Christian Kleeberg
Summary: This article investigates the versatile use of an unsymmetrical diborane(4) derivative as a precursor for PBP boryl pincer ligand for the synthesis of Co(I), Rh(I) and Ir(I/III) complexes. The coordination chemistry of a homologous series of PBP pincer complexes, particularly the interconversion of five- and four-coordinate complexes, is studied in detail.
Article
Biochemistry & Molecular Biology
Ronja Jordan, Doris Kunz
Summary: The coordination chemistry of an electron-rich macrocyclic CNC pincer-ligand was studied using NMR spectroscopy and X-ray crystal structure analysis. It was found that the ligand exhibited bridging coordination with lithium, facial coordination with potassium, and C-H activation with metal complexes.
Article
Chemistry, Multidisciplinary
Yihan Cao, Wei-Chun Shih, Nattamai Bhuvanesh, Jia Zhou, Oleg Ozerov
Summary: The study demonstrates selective C-H activation in the 2-position of pyridine and quinoline with Rh and Ir complexes, resulting in a 2-pyridyl bridging the transition metal and the boron center. Different ligands on the transition metal lead to isomerism derived from the 2-pyridyl fragment connecting via B-N/C-M or B-C/N-M bonds. The strength of the M-C(pyridyl) bond and the nature of the ligand trans to it play key roles in determining the relative M-C/M-N isomer favorability.
Article
Chemistry, Inorganic & Nuclear
Juan C. Babon, Miguel A. Esteruelas, Enrique Onate, Sonia Paz, Andrea Velez
Summary: The complex OsH4{kappa(3)-P,O,P-[xant((PPr2)-Pr-i)(2)]} (1) activates the Si-H bond of silanes, forming silyl-osmium(IV)-trihydride derivatives. The activation occurs through the generation of an intermediate, resulting from the dissociation of the oxygen atom of the pincer ligand. The cleavage of the Si-H bond in the silanes is the rate-determining step in this reaction.
Article
Chemistry, Inorganic & Nuclear
Frederik Rummel, Frerk Wehmeyer, Matthias Vogt, Robert Langer
Summary: The SNS-type pincer complex [({EtSCH2CH2}(2)NH)RuCl(H)(PPh3)] (2) exists in three different diastereomers (2 a-c), with a difference in the relative orientation of the EtS-groups observed in the molecular structures obtained from single crystal X-Ray diffraction studies. Chemical exchange between the three diastereomers 2 a-c was discovered and quantified using phase-sensitive H-1 and P-31 NOESY NMR spectroscopy. The results suggest an inversion of the ligating sulfur atoms, with a dissociative pathway also potentially playing a role in the configurational inversion.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Nicholas R. Wiedmaier, Hartmut Schubert, Hermann A. Mayer, Lars Wesemann
Summary: The ruthenium carbene pincer complex 2 was synthesized by treating benzo annulated cycloheptatriene bisphosphine 1 with RuCl3. Addition of three equivalents of hydrogen to generate hydrogenated complex 4 was achieved through reaction at elevated temperatures. The dehydrogenation of complex 4 by heating in toluene solution formed ethane and alkyl complex 5 when reacted with ethylene.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Ryohei Kawazu, Takeru Torigoe, Yoichiro Kuninobu
Summary: New ligands have been discovered for iridium-catalyzed C(sp(3))-H borylation of aliphatic compounds. A phenanthroline-based NNSi pincer ligand has shown excellent performance and enables efficient conversion of aliphatic compounds to borylated products using an Ir/NNSi pincer catalyst system.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Wenjun Yang, Ivan Yu. Chernyshov, Manuela Weber, Evgeny A. Pidko, Georgy A. Filonenko
Summary: In this study, a Mn(I) pincer complex that promotes site-controlled transposition of olefins was reported. By suppressing the N-H functionality within the complex through alkylation, a wide range of allylarenes can be efficiently converted to higher-value 1-propenybenzenes with excellent stereoselectivities. The complex also retains the reactivity towards a single positional isomerization for long-chain alkenes.
Article
Chemistry, Physical
Damien B. Culver, James M. Boncella
Summary: New (RPNP)-P-H ligands containing 2,4-xylyl (4mXPN(H)P) and mesityl (MesPN(H)P) groups on the phosphorus atoms were synthesized. These ligands reacted with ruthenium complexes to form various complexes with different reactivities. The activation of ortho methyl groups and the formation of transient amide complexes were observed. These complexes show potential as catalysts for dehydrogenative coupling reactions.
Article
Materials Science, Ceramics
Ulrich Schubert
Summary: Molecular metal oxo or oxo/alkoxo clusters can be isolated by hydrolysis of metal alkoxides and understanding of these clusters contributes to the knowledge of sol-gel chemistry. The ligands stabilize the cluster core and affect its structure, easily changing their position on the cluster surface and being exchanged under certain conditions.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Akhil K. Sivan, Jisha Mary Thomas, Chinnappan Sivasankar
Summary: Ammonia is an essential component for human society and has extensive applications and serves as a valuable source of energy. This theoretical work explores the utilization of [Co(N-2)((PNP)-P-R)] and ruthenium coordinated by nitrogen-doped graphene (NDG) as catalysts for the activation of N-2. The concept of Frustrated Lewis Pair [AH](+)[BH](-) (FLP-H-2) is utilized as a co-catalyst to prevent competitive binding of N-2 and H-2 to the metal center and enable the functionalization of N-2 into NH3 and hydrazine.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Review
Chemistry, Inorganic & Nuclear
Tingting Liu, Liandi Wang, Kaikai Wu, Qingfu Wang, Zhengkun Yu
Summary: This article provides a summary of the synthesis and organic synthetic applications of various pincer-type ruthenium(II) complexes. These complexes showed high catalytic activities in transfer hydrogenation of ketones, C-C bond formation from alcohols and ketones, and dehydrogenation reactions. The catalytically active intermediates for these transformations were identified as RuH complexes. The review covers mononuclear ruthenium(II) pincer complexes for (asymmetric) transfer hydrogenation of ketones, multinuclear ruthenium(II) complexes for transfer hydrogenation of ketones, and mononuclear ruthenium(II) complexes for other reactions such as Oppenauer-type oxidation, beta-alkylation of secondary alcohols, synthesis of multisubstituted heterocycles, and acceptorless dehydrogenation of N-heterocycles and secondary alcohols.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Jacob R. Prat, Ryan C. Cammarota, Brendan J. Graziano, James T. Moore, Connie C. Lu
Summary: A nickel-boron complex and its derivatives with unique bonding structure have been synthesized, demonstrating stable nickel coordination and low thermodynamic hydricity. The flexible topology of the boron metalloligand provides favorable hydrogen binding affinity and strong hydride donicity, at the expense of high H 2 basicity during deprotonation to form the hydride.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Surabhi Bhatt, Neha Meena, Mukesh Kumar, Nattamai Bhuvanesh, Anil Kumar, Anuj K. Sharma, Hemant Joshi
Summary: This report describes the synthesis, characterization, and catalytic activity of two ruthenium(II) ENE pincer complexes. The complex with selenium coordination, C2, showed higher efficiency compared to the complex with sulfur coordination, C1. Interactions of these complexes with CT-DNA and BSA were also studied.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Salvatore Baldino, Steven Giboulot, Denise Lovison, Hans Guenter Nedden, Alexander Poethig, Antonio Zanotti-Gerosa, Daniele Zuccaccia, Maurizio Ballico, Walter Baratta
Summary: A series of rhodium complexes have been synthesized and their isomerization reactions in methanol have been studied, using different nitrogen ligands and diphosphine ligands in the synthesis process.
Review
Chemistry, Multidisciplinary
Annie L. Colebatch, Benjamin J. Frogley, Anthony F. Hill, Chee S. Onn
Summary: The chemistry of transition metal carbynes has traditionally been dominated by species with hydrocarbyl or amino substituents, but there is a recent emergence of carbynes with other main-group substituents, particularly heavier elements of the p-block. This review focuses on the chemistry of heavier pnictogen-functionalised C-1 ligands and discusses recent developments in related phospha-isonitrile and cya-phosphide ligands.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Benjamin J. Frogley, Anthony F. Hill
Summary: The reactivity of tungsten diphenylarsinocarbyne and its formation of complexes with different metal centers, particularly with gold(i), are discussed. The treatment with MeOSO2CF3 results in methylation at arsenic, leading to the formation of arsoniocarbyne. This provides a new example of coordination chemistry involving tungsten and gold.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Liam K. Burt, Anthony F. Hill
Summary: The nature of the W=C-Pt carbido bridge was investigated through the synthesis of a series of complexes. The results showed that disubstitution occurs for aryl isocyanides, while monosubstitution occurs for alkyl isocyanides.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Liam K. Burt, Rian D. Dewhurst, Anthony F. Hill, Richard Y. Kong, Emily E. Nahon, Chee S. Onn
Summary: This study reports a series of rare mu(2)-halocarbyne complexes and characterizes and analyzes them through experimental and computational methods.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Ryan M. Kirk, Anthony F. Hill
Summary: This study reports the first examples of late transition metal eta(5)-arsolyls serving as ditopic donors to extraneous metal centres through both conventional and polar-covalent interactions.
Article
Chemistry, Multidisciplinary
Benjamin J. Frogley, Anthony F. Hill, Steven S. Welsh
Summary: Mono- and bimetallic anthracenes functionalised by alkynyl and alkynyl substituents are obtained through sequential cross-coupling reactions of the 9-bromoanthracenyl carbyne [W{ CC(C6H4)(2)CBr}(CO)(2)(Tp*)].
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Benjamin J. Frogley, Anthony F. Hill, Steven S. Welsh
Summary: Three examples of 9-bromo-10-(alkylidynyl)anthracenes were prepared using modified reaction protocols, with different ancillary ligands affecting the outcome of cross-coupling reactions. The study also revealed the formation of trimetallic bow-tie complexes when using smaller ligands.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Benjamin J. Frogley, Anthony F. Hill, Ryan M. Kirk
Summary: The gold(i)-catalysed tandem transmetallation reaction allows for the synthesis of a variety of novel arsinocarbyne complexes, including heterocyclic phenarsazininyl and arsolyl examples.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Benjamin J. Frogley, Anthony F. Hill
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Harrison J. Barnett, Anthony F. Hill
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Inorganic & Nuclear
Liam K. Burt, Anthony F. Hill
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Liam K. Burt, Richard L. Cordiner, Anthony F. Hill, Richard A. Manzano, Joerg Wagler
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Benjamin J. Frogley, Anthony F. Hill, Antonia Seitz
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Benjamin J. Frogley, Anthony F. Hill, Manab Sharma, Arup Sinha, Jas S. Ward
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Inorganic & Nuclear
Benjamin J. Frogley, Anthony F. Hill
DALTON TRANSACTIONS
(2020)
