Dalton Transactions

doi: 10.1039/d5dt90097bpmid: N/A

doi: 10.1039/d5dt90098kpmid: N/A

doi: 10.1039/d5dt90099apmid: N/A

Singh, Sohan; Yadav, Nisha; Mahala, Suman; Yadav, Jatin; Behera, Kamalakanta; Rao, Gyandshwar Kumar; Joshi, Hemant; Sharma, Kamal Nayan

doi: 10.1039/d4dt03502jpmid: 40181704

Organotellurium ligand-facilitated metal structures are known for their catalytic activity, anti-cancer activities, and nanomaterial applications. A wide range of organotellurium ligands, including telluroethers, pincer-based frameworks, and tellurolates, have been extensively explored for their coordination with diverse metal centers. These ligands have been successfully complexed with base metals, platinum group metals, rare earth elements, and representative metals, providing a unified resource of literature on metal complexes of organotellurium ligands. The resulting metal–organotellurium complexes exhibit intriguing structural diversities and potential applications in catalysis, materials science, and coordination chemistry. A comprehensive review on various applications of organotellurium ligands has not been available since 2005. Moreover, within the broader field of chalcogen chemistry, organotellurium ligands remain relatively less explored. Hence, this review focuses on the synthetic strategies and various applications of metal complexes containing organotellurium ligands, addressing a significant and critical gap existing in the literature. This review provides a comprehensive analysis of organotellurium ligands, focusing on their synthesis, structural diversity, and coordination chemistry. Beyond their fundamental significance, these ligands play a vital role in life sciences, nanochemistry, and materials science. Their catalytic proficiency is evident in essential organic reactions, including the Suzuki–Miyaura and Mizoroki–Heck couplings, alcohol oxidation, C–N bond formation, aldehyde activation, and nitrophenol reduction.

Philippopoulos, Athanassios I.; Demopoulos, Constantinos A.

doi: 10.1039/d4dt03496apmid: 40062437

Metal complexes displaying anti-inflammatory and antithrombotic properties are a promising research area. Development of new and effective anti-inflammatory and antithrombotic agents is necessary to prevent inflammatory-assisted diseases, thromboembolic disease and oxidative stress. In this frontier article, we report on coordination and organometallic compounds displaying anti-inflammatory and/or antithrombotic potencies, particularly through the inhibition of platelet aggregation. Non -classic targets, such as the platelet-activating factor (PAF), a phospholipid signaling molecule of the immune system and the most potent lipid mediator of inflammation, and its receptor (PAFR), along with collagen, serve as the target molecules in addition to thrombin and ADP (adenosine diphosphate). This article elucidates the progress in this area over the last 15 years, focusing on the great potential of transition metal complexes as possible therapeutic agents to treat inflammatory-assisted diseases, thromboembolic disease and oxidative stress. Metal-based inhibitors of inflammatory mediators could potentially constitute an interesting class of compounds as alternatives to the organic analogues currently in use. Results of this study show that this class of compounds merit further research towards the preparation of new metal-based complexes with improved pharmacological profiles.

Obeso, Juan L.; Barrios-Vargas, Luz J.; López-Cervantes, Valeria B.; Amador-Sánchez, Yoarhy A.; Martin-Guaregua, Nancy; Peralta, Ricardo A.; Munoz, Ramon; Martínez, Ana; Leyva, Carolina; Solis-Ibarra, Diego; Sánchez-González, Elí; Ibarra, Ilich A.; Montiel-Palma, Virginia

doi: 10.1039/d3dt03985dpmid: 40314775

Meyer, Felix; Demeshko, Serhiy; Golz, Christopher; Townrow, Oliver P. E.; Fischer, Malte

doi: 10.1039/d5dt00480bpmid: 40045774

We present the synthesis and characterization of the parent isolable monomeric triplet titanocene complex, stabilized by the N-heterocyclic carbene (NHC) IMe4. Investigated by SQUID magnetometry and quantum-chemical calculations, reactivity studies of the titanium precursor [Cp2Ti(btmsa)] (2) with the NHC IiPr2Me2 and the zirconocene complex [Cp2Zr(py)(btmsa)] (1) revealed divergent reactivity patterns, highlighting the role of steric and electronic effects in stabilization.

Ziółkowska, Aleksandra; Błaszkiewicz, Wiktoria; Kruczyński, Tomasz

doi: 10.1039/d5dt00692apmid: 40331274

A new lithium salt of diphosphane, (iPr2N)PhP–P(SiMe3)Li (2), featuring two substituents with distinct electronic characterstics, is reported. A subsequent reaction of the compound 2 with benzophenone was yielded a novel phosphanylphosphaalkene (3). The isolated compound was subsequently treated with nBuLi and PhLi to obtain stable activators (3a and 3b) for the potential polymerization of phosphorus-rich compounds.

Paramanik, Krishnendu; Bandopadhyay, Nilaj; Sarkar, Gayetri; Ghosh, Sourav; Panda, Subhra Jyoti; Purohit, Chandra Shekhar; Ghosh, Prasanta; Biswas, Bhaskar; Das, Hari Sankar

doi: 10.1039/d5dt00299kpmid: 40341953

In this work, a newly designed phenalenyl (PLY)-based copper-bipyridine (BPY) heteroleptic system of the form [(BPY)CuII(PLY)Cl] has been introduced as a cheap and effective catalytic system for the biarylation of furan using aryldiazonium salts. The crucial function of each unit of [(BPY)CuII(PLY)Cl] in this catalytic reaction was determined through a combination of structural, electrochemical, spectroscopic, theoretical, and mechanistic studies.

Ataie, Saeed; Khanzadeh, Atousa; Tom Baker, R.

doi: 10.1039/d5dt01008jpmid: 40343751

Phosphine-free catalysts for the Mizoroki–Heck cross-coupling reaction offer significant advantages in terms of air and moisture stability. We synthesized two palladium(ii) complexes featuring a thiolate-imine-thioether SNS pincer ligand: Pd(κ2-SNSMe)2 (Pd-1) and PdI(κ3-SNSMe) (Pd-2). Their catalytic activities were compared, with Pd-2 demonstrating excellent reactivity at a low catalyst loading of 1.5 mol%, efficiently producing olefin products across various substrates within 5 hours. Conversely, Pd-1 showed no catalytic activity due to its isomerization to a Pd(ii)-N2S2 complex via imine C–C bond formation at elevated temperatures, which restricted access to coordination sites necessary for oxidative addition and alkene coordination. Heating Pd-2 with excess NEt3 affords a Pd dithiolate tetramer, [Pd(μ-κ3-SNS)]4via selective C–S bond activation.