174231-27-7Relevant articles and documents
Exploring the Transphobia Effect on Heteroleptic NHC Cycloplatinated Complexes
Fuertes, Sara,Chueca, Andrés J.,Sicilia, Violeta
, p. 9885 - 9895 (2015)
The synthesis of 1-(4-cyanophenyl)-1H-imidazol (1) has been carried out by an improved method. Then its corresponding imidazolium iodide salt, 2, has been used to prepare the N-heterocyclic carbene (NHC) cycloplatinated compound [{Pt(μ-Cl)(CC?)}2] (4) (HCC?-κC? = 1-(4-cyanophenyl)-3-methyl-1H-imidazol-2-ylidene) following a step-by-step protocol. The intermediate complex [PtCl(η3-2-Me-C3H4) (HCC?-κC?)] (3) has also been isolated and characterized. Using 4 as precursor, several heteroleptic complexes of stoicheometry [PtCl(CC?)L] (L = PPh3 (5), pyridine (py, 6), 2,6-dimethylphenyl isocyanide (CNXyl, 7), and 2-mercapto-1-methylimidazole (MMI, 8)) and [Pt(CC?)LL′]PF6 (L = PPh3, L′ = py (9), CNXyl (10), and MMI (11)) have been synthesized. Complexes 6-8 were obtained as a mixture of cis- and trans-(C?,L) isomers, while trans-(C?,L) isomer was the only one observed for complexes 5 and 9-11. Their geometries have been discussed in terms of the degree of transphobia (T) of pairs of trans ligands and supported by theoretical calculations. The trans influence of the two σ Pt-C bonds present in these molecules, Pt-CAr and Pt-C?(NHC), has been compared from the JPt-P values observed in the new complex [Pt(CC?)(dppe)]PF6 (dppe = 1, 2-bis(diphenylphosphino)ethane, 12).
NHC ligand-based half-sandwich iridium complexes: synthesis, structure and catalytic activity in acceptorless dehydrogenation and transfer hydrogenation
Deng, Wei,Jin, Yan,Li, Rong-Jian,Liu, Zhen-Jiang,Wang, Yang,Yao, Zi-Jian
, p. 19002 - 19010 (2021/10/29)
A set of neutral C,C-chelate half-sandwich iridium(iii) complexes have been prepared with NHC ligands that contain pendant aromatic rings as potentially chelating donor sites. The catalytic activity of such iridium complexes has been investigated for the acceptorless dehydrogenation (AD) reactions of alcohols and for the transfer hydrogenation reactions of ketones. The prepared iridium(iii) complexes show excellent catalytic activity for AD reactions of a wide range of secondary alcohols, and they are also shown to be effective for the synthesis of aldehydes from primary alcohols without the observation of undesired byproducts such as esters. Additionally, these complexes are also highly efficient in transfer hydrogenation of ketones and aldehydes, which give the alcohols in good yields under mild conditions. The exact structure and bonding mode of the NHC-based iridium complexes was identified using various spectroscopic methods and single crystal X-ray analysis.
Luminescent biscarbene iridium(iii) complexes as living cell imaging reagents
Zhou, Yuyang,Jia, Junli,Li, Wanfei,Fei, Hao,Zhou, Ming
, p. 3230 - 3232 (2013/05/08)
Five iridium(iii) complexes with two N-heterocyclic carbene (NHC) ligands and an ancillary ligand have been designed and successfully synthesized. With multicolor photoluminescence and low toxicity, these carbene complexes were tested, for the first time,
PROCESS FOR PREPARING TRANSITION METAL-CARBENE COMPLEXES
-
Page/Page column 14, (2009/01/24)
Process for preparing cyclometallated transition metal-carbene complexes comprising at least one carbene ligand, which comprises reacting a ligand precursor with a base, an auxiliary reagent and a metal complex comprising at least one metal M1
USE OF TRANSITION METAL CARBENE COMPLEXES IN ORGANIC LIGHT-EMITTING DIODES (OLEDS)
-
Page/Page column 58, (2008/06/13)
The invention relates to the use of transition metal carbene complexes in organic light-emitting diodes (OLEDS), to a light-emitting layer, a blocking layer for electrons or excitrons or a blocking layer for holes containing these transition metal carbene
