Articles with "diimine" as a keyword



Synthesis and Photophysical Evaluation of 3,3’‐Nitrogen Bis‐Substituted fac‐[Re(CO)3(Diimine)Br] Complexes

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Published in 2024 at "Helvetica Chimica Acta"

DOI: 10.1002/hlca.202300239

Abstract: The preparations, photophysical and electrochemical properties of a series of fac‐[Re(CO)3(diimine)Br] complexes are presented. The bipyridine (bpy) based diimine ligands feature symmetrical and asymmetrical 3,3’‐diamino‐2,2’‐bipyridine substitution patterns. Photophysical and electrochemical properties of these complexes are… read more here.

Keywords: photophysical evaluation; diimine complexes; synthesis photophysical; diimine ... See more keywords

γ-Diimine palladium(II) based complexes mediated polymerization of methyl methacrylate

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Published in 2017 at "Arabian Journal of Chemistry"

DOI: 10.1016/j.arabjc.2013.02.019

Abstract: Abstract The synthesis of new palladium(II) complexes of the type [Pd(A–N C–ph–C N–A)Cl2] (4a–e) (A = cyclohexyl (a), 2-isoprpropyl (b), pyrenyl (c), naphthyl (d), and 2,6-diisopropyl (e)) is described. The isolated γ-diimine ligands and their corresponding palladium(II)… read more here.

Keywords: palladium; polymerization; methyl methacrylate; diimine ... See more keywords

Synthesis and electronic characterization of mixed diimine ligand rhodium(III) complexes using a versatile triflate precursor

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Published in 2017 at "Inorganica Chimica Acta"

DOI: 10.1016/j.ica.2017.02.011

Abstract: Abstract We report here the first general, high purity, high yield synthesis of thirteen mixed diimine ligand complexes of rhodium(III), nine of which are new and four which are known and were made as controls.… read more here.

Keywords: triflate; diimine ligand; electronic characterization; mixed diimine ... See more keywords

Octahedral Iron Complexes of Pyrazine(diimine) Pincers: Ligand Electronic Effects and Protonation.

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Published in 2020 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.0c02211

Abstract: Redox noninnocent ligands are known to be involved in altering the overall electronic nature of organometallic complexes by serving as an electron reservoir. Pyrazine(diimine) backbones in these complexes introduce enhanced π acidity over their more… read more here.

Keywords: pyrazine diimine; diimine; pzdi 2fe; octahedral iron ... See more keywords

Boosting the Thermal Stability of α-Diimine Palladium Complexes in Norbornene Polymerization from Construction of Intraligand Hydrogen Bonding and Simultaneous Increasing Axial/Equatorial Bulkiness.

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Published in 2021 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.0c03185

Abstract: Increasing the thermostability of α-diimine late-transition-metal complexes and therefore rendering them more active at higher temperatures is of great importance, yet challenging for the olefin polymerization field. In the present research, a new family of… read more here.

Keywords: polymerization; palladium complexes; diimine palladium; diimine ... See more keywords

Exploring the Relationship between the Polyethylene Microstructure and Spatial Structure of α-Diimine Pd(II) Catalysts via a Hybrid Steric Strategy.

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Published in 2022 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.1c03969

Abstract: The branching density of polyethylene generated in the α-diimine Pd(II) system is usually very high, largely independent of simple ligand modifications with steric or electronic perturbations, or the polymerization conditions. In this study, we designed… read more here.

Keywords: polyethylene microstructure; spatial structure; relationship polyethylene; diimine ... See more keywords

Effects of Structural Constraints on Excited-State Properties in Dimeric Cu(I) Diimine Complexes.

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Published in 2024 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.4c01251

Abstract: Copper(I) bis-diimine complexes have played important roles in light-activated processes that can lead to their potential applications in photocatalysis and chemical sensing. Their metal-to-ligand charge-transfer (MLCT) excited-state properties are tunable by various structural factors. Dimeric… read more here.

Keywords: state properties; excited state; diimine complexes; structural constraints ... See more keywords
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Supramolecular Construction of Cyanide-Bridged ReI Diimine Multichromophores.

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Published in 2019 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.8b02974

Abstract: The reactions of labile [Re(diimine)(CO)3(H2O)]+ precursors (diimine = 2,2'-bipyridine, bpy; 1,10-phenanthroline, phen) with dicyanoargentate anion produce the dirhenium cyanide-bridged compounds [{Re(diimine)(CO)3}2CN)]+ (1 and 2). Substitution of the axial carbonyl ligands in 2 for triphenylphosphine gives… read more here.

Keywords: supramolecular construction; bridged rei; cyanide bridged; construction cyanide ... See more keywords

Iridium(I)– and Rhodium(I)–Olefin Complexes Containing an α-Diimine Supporting Ligand

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Published in 2022 at "Organometallics"

DOI: 10.1021/acs.organomet.2c00036

Abstract: Iridium(I) complexes of the type IrX(olefin)(α-diimine) (α-diimine = 1,4-bis(2,6-xylyl)-2,3-dimethyl-1,4-diaza-1,3-butadiene; X = Cl, I, Me, O2CCF3; olefin = ethylene, cyclooctene (COE)) were synthesized from the readily available precursor [IrCl(COE)2]2. These complexes display unusual 1H NMR spectra… read more here.

Keywords: olefin complexes; diimine; iridium rhodium; rhodium ... See more keywords

Deciphering the Olefin Isomerization-Polymerization Paradox of Palladium(II) Diimine Catalysts: Discovery of Simultaneous and Independent Pathways of Olefin Isomerization and Living Polymerization.

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Published in 2023 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.3c01513

Abstract: This work elucidates a long-standing unexplained paradox commonly observed within the polymerization of α-olefin using palladium (Pd)(II)-diimine catalysts, in which isomerization and living polymerization of α-olefins are both observed. With a classical mechanistic understanding of… read more here.

Keywords: olefin isomerization; diimine; isomerization; isomerization living ... See more keywords

Structural and Electronic Noninnocence of α-Diimine Ligands on Niobium for Reductive C-Cl Bond Activation and Catalytic Radical Addition Reactions.

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Published in 2017 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.7b02710

Abstract: A d0 niobium(V) complex, NbCl3(α-diimine) (1a), supported by a dianionic redox-active N,N'-bis(2,6-diisopropylphenyl)-1,4-diaza-2,3-dimethyl-1,3-butadiene (α-diimine) ligand (ene-diamido ligand) served as a catalyst for radical addition reactions of CCl4 to α-olefins and cyclic alkenes, selectively affording 1:1 radical… read more here.

Keywords: addition; bond; reaction; diimine ... See more keywords