نتایج جستجو برای: unsymmetrical ligand

تعداد نتایج: 108948  

M. Ebrahimi seyed Ali Haj Seiyed Taghia

The prevention of environmental damage in durable unsymmetrical huge-capacitor (UHC) with α-MnO2 nanotubes and amorphous Fe2O3 nanotubes grown on flexible carbon fabric is first designed and fabricated. The assembled novel flexible UHC device with an extended operating voltage window of 1.6 V exhibits excellent performance such as a high energy density of 0.55 mWh/cm3 and good rate capability. ...

Journal: :Inorganica Chimica Acta 2022

[Re3(μ-H)3(μ3-CH3)(CO)9]- (1) reacts with CO at 273 K to quantitatively give the [Re3(μ-H)3(μ-CH3)(CO)10]- derivative (2) through conversion of methyl group from triply doubly-bridging coordination. An NMR isotopic perturbation experiment demonstrates unsymmetrical bridging on Re-Re bond, and a fast exchange, in solution, between one agostic two terminal CH bonds. This is agreement X-Ray diffra...

Journal: :Chemical communications 2011
Janet T F Lau Pui-Chi Lo Yee-Man Tsang Wing-Ping Fong Dennis K P Ng

A series of unsymmetrical silicon(IV) phthalocyanines with a permethylated β-cyclodextrin unit and a sugar or a diamino moiety as the axial substituents have been prepared. These compounds are highly photocytotoxic with IC(50) values as low as 21 nM, which is ca. sevenfold lower than those of the symmetrical bis(cyclodextrin) analogue.

Journal: :Chemical communications 2012
Ludovic Marciasini Nicolas Richy Michel Vaultier Mathieu Pucheault

Sequential borylation of a first aryl iodide using a dialkylaminoborane followed by a Suzuki-Miyaura cross coupling of second aryl iodide ended up with an efficient, selective and practical synthesis of unsymmetrical biaryls. This tandem coupling shows a wide range of applicability.

2007
Najoua Belhaj Mbarek Elmkacher Mohamed Rzaigui Faouzi Bouachir

The cation of the title salt, C(34)H(45)N(2) (+)·PF(6) (-), is a protonated form of an unsymmetrical overcrowded β-imino-amine. The observed bond lengths [C-N = 1.326 (4)-1.341 (4) Å and C-C = 1.383 (4)-1.391 (4) Å] suggest significant delocalization within the π system of the N C C C N backbone.

Journal: :The Journal of organic chemistry 2013
Yan Yang Fan Ni Wen-Ming Shu Shang-Bo Yu Meng Gao An-Xin Wu

An efficient procedure has been developed for the preparation of tetrasubstituted unsymmetrical 1,4-enediones via copper-promoted autotandem catalysis and air as the oxidant. Various N-nucleophiles are compatible with this reaction, such as morpholine, piperidine, pyrrolidine, arylamines, pyrazole, imidazole, benzimidazole, and benzotriazole. This reaction also has significant advantages in eas...

Journal: :Chemical communications 2013
Peter Bellham Michael S Hill Gabriele Kociok-Köhn David J Liptrot

Heavier group 2 (Mg, Ca) bis(trimethylsilyl)amides are catalysts for the formation of unsymmetrical diaminoboranes, [(R(2)N)BH(NR'(2))], by dehydrocoupling of amine boranes and protic amines; a process which is proposed to occur by a sequential metal-centred elimination-insertion-elimination mechanism.

Journal: :Molecules 2013
Yakini Brandy Nailah Brandy Emmanuel Akinboye Malik Lewis Claudia Mouamba Seshat Mack Ray J Butcher Alan J Anderson Oladapo Bakare

Symmetrical and unsymmetrical 3-halo- or 3-methoxy- substituted 2-dibenzoylamino- 1,4-naphthoquinone analogs were synthesized with an average yield of 45% via sodium hydride promoted bis-acylation of 2-amino-3-chloro-1,4-naphthoquinone, 2-amino-3-bromo-1,4-naphthoquinone and 2-amino-3-methoxy-1,4-naphthoquinone.

Journal: :The Journal of organic chemistry 2005
Xiaodan Zhao Zhengkun Yu Shenggang Yan Sizhong Wu Ren Liu Wei He Liandi Wang

[equation: see text] An efficient one-pot route to unsymmetrical diorganyl selenides has been developed by ruthenium(III) chloride catalyzed reactions of dibenzyl or diphenyl diselenides with alkyl halides in the presence of zinc. Organic iodides, bromides, and activated chlorides underwent the reactions efficiently. Unreactive organic chlorides also underwent the same type of selenation with s...

Journal: :Organic & biomolecular chemistry 2015
Ramasamy Manoharan Masilamani Jeganmohan

A regioselective synthesis of substituted pyrroloquinolinones via a ruthenium-catalyzed oxidative cyclization of substituted N-carbamoyl indolines with alkynes is described. The cyclization reaction was compatible with various symmetrical and unsymmetrical alkynes including substituted propiolates. Later, we performed the aromatization of pyrroloquinolinones into indole derivatives in the prese...

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