Article
Chemistry, Inorganic & Nuclear
Peter L. Dunn, Melissa Barona, Samantha I. Johnson, Simone Raugei, R. Morris Bullock
Summary: Double hydrogen atom abstraction from (TMP)OsII(NH3)2 with phenoxyl or nitroxyl radicals leads to (TMP)OsIV(NH2)2. This unusual bis(amide) complex is diamagnetic and displays an N-H resonance at 12.0 ppm in its 1H NMR spectrum. Experimental reactivity studies and density functional theory calculations support weak N-H bonds for (TMP)OsII(NH3)2 and (TMP)OsIII(NH3)(NH2). Cyclic voltammetry experiments provide an estimate of the pKa of [(TMP)OsIII(NH3)2]+.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Dmitri Gelman, Ilya Kisets, Sofiya Zabelinskaya
Summary: The synthesis and catalytic studies of a prototypical coordinatively rigid carbometalated half-sandwich Ru(II) complex with a rigid polyaromatic tether were described. Despite its coordinatively and electronically saturated nature, the complex demonstrated the ability to activate and transfer hydrogen to polar and nonpolar double bonds. The catalytic activity was benchmarked in the Ru-catalyzed chemoselective hydrogenation of alpha,beta-unsaturated ketones, with initial mechanistic studies suggesting an inner-sphere mechanism via dihydride intermediates.
Article
Chemistry, Inorganic & Nuclear
Nida Shahid, Rahul Kumar Singh, Navdeep Srivastava, Amrendra K. K. Singh
Summary: A series of Ru(III)-NHC complexes have been prepared through a base-free route. These air and moisture-stable complexes, which represent rare examples of paramagnetic Ru(III)-NHC complexes, were shown to be excellent metal precursors for the synthesis of new Ru(II)-NHC complexes. This work allows easy access to new Ru-NHC complexes for the study of new properties and novel applications.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Tingting Liu, Qingfu Wang, Liandi Wang, Kaikai Wu, Zhengkun Yu
Summary: In this study, multinuclear porphyrin-based ruthenium(II)-NNNN complexes were efficiently assembled and used for low-loading ruthenium-catalyzed transfer hydrogenation of ketones, demonstrating high catalytic activity and yields.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Robert T. Kumah, Stephen O. Ojwach
Summary: In this study, a series of dinuclear piano-stool ruthenium (II) complexes were synthesized and their structures were confirmed using various analytical techniques. The catalytic performances of these complexes in transfer hydrogenation reactions were investigated, and the results showed that they exhibited high catalytic activities and could efficiently catalyze a broad range of ketones at low catalyst loadings.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Marzia Cavallo, Davide Arnodo, Alberto Mannu, Marco Blangetti, Cristina Prandi, Walter Baratta, Salvatore Baldino
Summary: This study describes the use of affordable ruthenium(II) complexes as pre-catalysts in the transfer hydrogenation of carbonyl compounds in deep eutectic media for the first time. The eutectic mixture TBABr/HCOOH acts as both reaction medium and hydrogen source, requiring the addition of a base for the process. The optimized catalytic system of [RuCl(p-cymene)-mu-Cl](2) and dppf has shown good activity for the reduction of aldehydes and ketones to alcohols under mild conditions, with moderate to excellent tolerance towards different functional groups.
Article
Chemistry, Inorganic & Nuclear
Alessio Vidal, Rudy Calligaro, Gilles Gasser, Roger Alberto, Gabriele Balducci, Enzo Alessio
Summary: A synthetic strategy for preparing bis-heteroleptic polypyridyl Ru(II) complexes was described, with the focus on minimizing the formation of undesired species by adjusting reaction conditions. High selectivity towards the desired product was achieved by carefully controlling the reaction parameters and conditions.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Robert T. Kumah, Paranthaman Vijayan, Stephen O. Ojwach
Summary: The reactions between two ligands and ruthenium precursors resulted in the synthesis of organo-carboxamide ruthenium(II) complexes. These complexes exhibited moderate catalytic activities in the transfer hydrogenation of ketones.
NEW JOURNAL OF CHEMISTRY
(2022)
Review
Chemistry, Inorganic & Nuclear
Antal Udvardy, Ferenc Joo, Agnes Katho
Summary: The compound 1,3,5-Triaza-7-phosphaadamantane (pta, phosphaurotropine) has played a crucial role in the development of aqueous organometallic chemistry and catalysis due to its easy synthesis, oxidation stability, versatile functionalization possibilities, and high solubility in both water and common organic solvents. It has been used to synthesize transition metal complexes and has been employed as catalysts in various important aqueous-phase processes, contributing significantly to the advancement of green chemical processes.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Inorganic & Nuclear
Brandon T. Watson, Mukundam Vanga, Anurag Noonikara-Poyil, Alvaro Munoz-Castro, H. V. Rasika Dias
Summary: Bis-and tris-pyridyl borate ligands with pyridyl donor arms, a methylated boron cap, and a fluorine-lined coordination pocket have been synthesized and used in coinage metal chemistry. These ligands allowed for the isolation of group 11 metal-ethylene complexes, with gold complexes showing the largest coordination-induced upfield shifts of the ethylene 13C resonance. Solid-state structures of these complexes revealed the rare K2 coordination mode instead of the typical K3 coordination mode. Computational analyses indicated the favored K2 coordination mode and the strong interaction between gold(I) and ethylene.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Sebastian Parra-Melipan, Vicente Lopez, Sergio A. Moya, Gonzalo Valdebenito, Braulio Aranda, Pedro Aguirre
Summary: This paper reports the catalytic activity of a series of ruthenium (II) complexes containing phosphorus nitrogen bidentated (P-N) ligands in the hydrogenation of furfural via hydrogen transfer reaction. The results show high activity of the complexes with both hydrogen donor sources, with better selectivity observed when formic acid was used. The use of formic acid as the hydrogen source yielded furfuryl alcohol with 100% selectivity, providing renewable products with applications in the organic chemical industry.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Inorganic & Nuclear
Dai Oyama, Takatoshi Kanno, Tsugiko Takase
Summary: This study successfully synthesized ruthenium complexes containing both hydroquinone and quinone units, which allowed for the isolation and characterization of their reduced and oxidized forms. The properties of the complexes were compared, and synergistic effects between metal complexes and redox-active organic compounds were demonstrated through electron transfer and photoirradiation-induced quinone/hydroquinone interconversion.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Feng Chen, Isolda Romero-Canelon, Abraha Habtemariam, Ji-Inn Song, Samya Banerjee, Guy J. Clarkson, Lijiang Song, Ivan Prokes, Peter J. Sadler
Summary: We synthesized a series of novel substituted sulfonyl ethylenediamine (en) Ru-II arene complexes, which showed antiproliferative activity against cancer cells and exhibited catalytic activity in transfer hydrogenation reactions and reactions with thiols.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Duc Hanh Nguyen, Delphine Merel, Nicolas Merle, Xavier Trivelli, Frederic Capet, Regis M. Gauvin
Summary: Neutral and ionic ruthenium and iron aliphatic (PNP)-P-H-type pincer complexes with benzyl, n-butyl or tert-butyl isocyanide ancillary ligands have been prepared and characterized. The ruthenium complexes are active in acceptorless alcohol dehydrogenative coupling reactions, with 3a-c showing higher initial activity.
DALTON TRANSACTIONS
(2021)
Article
Multidisciplinary Sciences
Andreas Weilhard, Stephen P. Argent, Victor Sans
Summary: The study presents a methodology utilizing ionic liquids as buffers for catalytically transforming CO2 into formic acid with high efficiency. The combination of multifunctional basic ionic liquids and catalyst design enables the synthesis of formic acid with very high catalytic efficiency. This highly efficient catalytic system avoids the use of strong bases and the formation of formate salts.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Guojun Hu, Ziyue Deng, Yanwei Wang, Dan Yuan, Yong Zhang, Yingming Yao
Summary: A series of rare-earth metal complexes were synthesized and used as efficient initiators for the polymerization of trimethylene carbonate (TMC) and (L)-lactide ((L)-LA).
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Van Ha Nguyen, John H. K. Yip
Summary: In this study, eight PtII-azulene complexes were synthesized to investigate the effect of metalation on the electronic structures, spectroscopy, and luminescence of organic chromophores. The results showed that the attachment of Pt substituents to azulene affected the HOMOs, LUMOs, and luminescence properties. The study provides insights into the role of metalation in modifying the properties of organic chromophores.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Moon Kedia, Virender Singh, Bhaskaran Shankar, Malaichamy Sathiyendiran
Summary: This study synthesized two types of neutral binuclear metallocycles using a one-pot solvothermal method and characterized their structures. The analysis revealed that these complexes adopt a binuclear heteroleptic cyclic architecture and belong to phosphine oxide donor (P=O)-based supramolecular coordination cyclic complexes.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Radhey S. Srivastava
Summary: This study demonstrates the effectiveness of zero-valent elements as reductants for the deoxydehydration reaction of polyols catalyzed by ONO-pincer ligated molybdenum dioxo. The insolubility and easy separability of the reductants and their oxidized products during the reaction are emphasized. Additionally, the choice of ligand has an impact on the catalytic performance of the reaction.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Hao Zhou, Yajun Sun, Li Deng, Weiran Yang, Yuehui Li
Summary: Efficient Ru-catalyzed hydrogenation of aldehydes was achieved using carbazole-derived phosphine ligands, with the crucial role of N-H moiety in promoting the catalytic reaction. The method was successfully applied in the Co/Ru-catalyzed hydroformylation process, resulting in the production of long-chain alcohols with excellent yields.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Theodor Danescu, Alexandru Lupan, Radu Silaghi-Dumitrescu, R. Bruce King
Summary: The structures and energies of complexes containing (Me2C2N2P)2Ru2(CO)n and (Me2C2N2P)2Fe2(CO)n have been studied. Low-energy structures are characterized by the presence of bridging diazaphospholyl rings, while higher-energy structures involve different ligand structures.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Savannah C. Kapper, Aamani Ponnekanti, Jonas Schaab, Tian-yi Li, Christine L. Chung, Gael Ung, Peter I. Djurovich, Mark E. Thompson
Summary: Organometallic iridium complexes with two cyclometalated ligands and one bis-oxazoline derived ancillary ligand were studied. These complexes have emission spanning across the visible and near-ultraviolet region, with moderate to high photoluminescence quantum yields. The (ppy)2Ir(BOX-CN) complexes were resolved into Delta- and Lambda-diastereomers based on solubility differences.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zahra Karimi Sangari, Hossein Naeimi
Summary: In this research, a nanostructured CoCuFe2O4 catalyst was prepared using a brief and useful synthetic strategy. This catalyst was used for synthesizing 1,2,4,5-tetrasubstituted imidazole derivatives under ultrasonic irradiation. The approach offers advantages such as high efficiency, short reaction times, simplicity of the reaction medium, accelerated reaction rates, and easier separation and purification of products.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rukhsana Gul, Wajid Munir, Ebraheem Abdu Musad Saleh, Shaukat Shujah, Muhammad Sirajuddin, Saira Tabassum, Khalil Ur Rehman, Dilfaraz Khan, Sameerah I. Al-Saeedi, Ehab A. Abdelrahman
Summary: Two new Schiff base ligands were synthesized and used to form copper, nickel, and cobalt complexes. The synthesized compounds were characterized and screened for various biological activities. The metal complexes showed better activities in antibacterial, antifungal, antidiabetic, and antioxidant assays.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Review
Chemistry, Inorganic & Nuclear
Ahsan Nazir, Pengwei Huo, Ameena Tur Rasool
Summary: This review explores the potential of g-C3N4-based S-scheme heterojunctions in addressing environmental issues. It summarizes the mechanism and preparation techniques of S-scheme heterojunctions based on g-C3N4, and presents recent studies on their applications in pollutant removal, CO2 reduction, hydrogen production, and bacterial disinfection. The review concludes with an outlook on future challenges for g-C3N4-based S-scheme heterojunctions.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Francois Mazars, Koffi Senam Etse, Guillermo Zaragoza, Lionel Delaude
Summary: The activity of three Pd-PEPPSI catalyst precursors with N-heterocyclic carbene (NHC) ligands derived from caffeine and theophylline in Mizoroki-Heck reactions was tested. The results showed that the catalysts achieved high conversions and yields, especially in the presence of electron-withdrawing substituents.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Bo-Han Wu, Xue Zhou, Lin Liu, Zheng-Bo Han
Summary: Researching carbon dioxide removal from flue gas and natural gas is crucial. Metal-organic frameworks (MOFs) are commonly used in adsorption due to their high surface area, porosity, and chemical properties. An ultra-microporous MOF CPM-20(Co) with mixed ligand was synthesized using inexpensive ligands. The material exhibited high selectivities and low regenerative energy, making it a promising option for CO2 separation in industries.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)