Platinum(II) metalla-N-heterocyclic carbene complexes featuring pyridyl heterocyclic moiety demonstrate remarkable catalytic efficiency in alkyne hydrosilylation under green light irradiation. The photocatalytic properties of complexes are rationalised by the photo-induced charge transfer occurring in extended condensed system identified with the help of various experimental (UV/vis and emission spectroscopy, cyclic voltammetry) and theoretical methods (DFT/TD-DFT, IFCT analysis).
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/chem.202403264 | DOI Listing |
Dalton Trans
December 2024
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Jiangwan Campus, Fudan University, Shanghai 200438, China.
The phosphaguanidinate rare-earth-metal bis(aminobenzyl) complexes [(PhP)C(NCHPr-2,6)]Ln(CHCH NMe-) (Ln = Y(1-Y) and Lu(1-Lu)) were synthesized by the protonolysis of (PhP)[C(NHR)(NR)] (R = 2,6-(Pr)CH) with Ln(CHCHNMe-) (Ln = Y and Lu). Interestingly, the ring-opening rearrangement product [-MeNCHCHC(NCHPr-2,6)]Lu(CHCHNMe-)[O(CH)PPh] (2) was obtained when the acid-base reaction was carried out in THF solution at 60 °C for 36 h. Additionally, the trinuclear homometallic yttrium multimethyl/methylidene complex {[(PhP)C(NCHPr-2,6)]Y(μ-Me)}(μ-Me)(μ-CH) (3) was synthesized by the treatment of 1-Y with AlMe (2 equiv.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Shandong University, Chemistry and Chemical Engineering, Shanda South Road 27, 250100, Jinan, CHINA.
Catalytic transformation of carbene species constitutes a fundamental part in organic synthesis, and the research in this direction has been dominated by transition metals while organic catalysts are difficult to mimic such transition-metal-like reactivity. It would significantly advance carbene chemistry if organic catalysts enable achieving classical metal-carbene approaches otherwise unrealizable reactions. Herein, we report that chalcogen bonding catalysis can solve reactivity problem to achieve an elusive Buchner ring expansion of aryl ketones appending a cyclopropene moiety as carbene precursor.
View Article and Find Full Text PDFChem Asian J
December 2024
CSIR - North East Institute of Science and Technology, Materials Sciences and Technology Division, Pulibor, CSIR-NEIST, 785006, Jorhat, INDIA.
Bimetallic catalysts have gained attention as promising contenders, owing to the synergistic interaction between two distinct metal centers. In this study, we present two N-heterocyclic carbene iridium(III) pentamethylcyclopentadienyl complexes [Cp*Ir(fcpyNHC)Cl]PF6 (1) and [Cp*Ir(pyNHC)Cl]PF6 (2) where 1 includes a ferrocene moiety acting as a bimetallic complex. Using ceric ammonium nitrate as a sacrificial oxidant, both complexes were tested for water oxidation.
View Article and Find Full Text PDFJ Org Chem
December 2024
College of New Energy, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China.
The photocatalytic dearomative 1,4-hydroboration of naphthalenes with an N-heterocyclic carbene borane (NHC-BH) complex was reported herein with controllable regioselectivity and chemoselectivity. This protocol yielded a wide range of naphthalene derivatives bearing various functional groups, notably bioactive compounds. Hydroboration occurred through the cooperation of photoredox and hydrogen atom transfer via boryl radical addition to naphthalene and further selective protonation.
View Article and Find Full Text PDFInorg Chem
December 2024
Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 19, 30100 Murcia, Spain.
Dicationic, -symmetrical, tris-chelate Pt(IV) complexes of general formula [Pt(trz)(N∧N)](OTf), bearing two cyclometalated 4-butyl-3-methyl-1-phenyl-1-1,2,3-triazol-5-ylidene (trz) ligands and one aromatic diimine [N∧N = 2,2'-bipyridine (bpy, ), 4,4'-di--butyl-2,2'-bipyridine (dbbpy, ), 4,4'-dimethoxi-2,2'-bipyridine (dMeO-bpy, ), 1,10-phenanthroline (phen, ), 4,7-diphenyl-1,10-phenanthroline (bphen, ), dipyrido[3,2-:2',3'-]phenazine (dppz, ), or 2,3-diphenylpyrazino[2,3-][1,10]phenanthroline (dpprzphen, )] are obtained through chloride abstraction from [PtCl(trz)] () using AgOTf in the presence of the corresponding diimine. Complexes show long-lived phosphorescence from LC excited states involving the diimine ligand, with quantum yields that reach 0.18 in solution and 0.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!