نتایج جستجو برای: bimetallic complexes

تعداد نتایج: 140785  

Journal: :Dalton transactions 2013
Joseph D Kistler Pedro Serna Bruce C Gates

A family of supported bimetallic samples was prepared by the reactions of Rh(C2H4)(acac) (acac = acetylacetonate) and Os3(CO)12 with MgO. The samples were characterized by infrared and extended X-ray absorption fine structure spectroscopies, before and after various treatments with hydrogen at temperatures up to 393 K. The spectra identify the following combinations of supported species: (a) [O...

Journal: :Dalton transactions 2015
Mario J Bitzer Alexander Pöthig Christian Jandl Fritz E Kühn Walter Baratta

Reaction of [Ru(OAc)2(PPh3)2] with a P-functionalized imidazolium bromide easily affords a cationic abnormal carbene Ru system. Metalation with Ag2O yields a Ru-Ag complex containing an anionic dicarbene ligand, while subsequent transmetalation with Au(tht)Cl leads to the corresponding Ru-Au system. The bimetallic complexes were characterized by single crystal X-ray diffraction and are the firs...

Journal: :Dalton transactions 2013
Fei Xue Jin Zhao T S Andy Hor

Structurally distinctive dinuclear Ni(II) complexes with furan or thiophene tethered amine-pyrazolyl tripodal hybrid ligands have been synthesized and crystallographically characterized. All complexes are catalytically active towards cross-coupling of aryl/alkyl Grignard reagents with β-H containing alkyl halides at room temperature in the presence of N,N,N',N'-tetramethylethylenediamine (TMEDA...

Journal: :Inorganic chemistry 2013
Chia Nung Tsai Yi-Han Tian Xuetao Shi Richard L Lord H Bernhard Schlegel Yuan Jang Chen John F Endicott

The heretofore unknown emission properties of the metal-to-ligand charge-transfer (MLCT) excited states of several complexes with (ruthenium)(monodentate aromatic ligand, MDA) chromophores are given. Emission spectra and lifetimes in 77 K glasses are reported for several monometallic complexes of the type [Ru(NH3)(5-n)(L)(n)(MDA)](2+) and two bimetallic pyrazine (pz)-bridged [{Ru(NH3)(4-n)(L)(n...

Journal: :Dalton transactions 2017
F Möller L Castañeda-Losada J R C Junqueira R G Miller M L Reback B Mallick M van Gastel U-P Apfel

While bimetallic azacryptands are known to selectively coordinate CO2, there is little knowledge on how different substitution patterns of the azacryptand cage structure influence CO2 coordination. Stopped-flow UV-vis spectroscopy, electrochemical analysis and DFT calculations were performed on a series of dinickel azacryptands and showed different rates of CO2 coordination to the complexes. We...

2013
G. S. Sodhi J. Kaur

Thermogravimetric (TG) studies have been carried out for some bimetallic dithiocarbamate complexes o f the type ZnML4 and NiM 'L4 [M = Co(II), Cu(II); M' = Zn(II), Hg(II); L = N-methylcyclohexyldithiocarbamate; L' = N-ethylcyclohexyldithiocarbamate]. From TG curves, the order, apparent activation energy and apparent activation entropy for the thermal decomposition reaction have been calculated....

Journal: :Dalton transactions 2016
Wenxue Yang Ke-Qing Zhao Bi-Qin Wang Carl Redshaw Mark R J Elsegood Jiang-Lin Zhao Takehiko Yamato

The [2 + 2] Schiff-base macrocycles [2,2'-(CH2CH2)(C6H4N[double bond, length as m-dash]CH)2-2,6-(4-RC6H2OH)]2 ((R)H2), upon reaction with MnCl2 (two equivalents) afforded the bimetallic complex [Cl3Mn(μ-Cl)Mn((Me)H2)] (1) or the salt complex [Cl3Mn(NCMe)][MnCl((tBu)H2)] (2). Under similar conditions, use of the related [2 + 2] oxy-bridged macrocycle [2,2'-O(C6H4N[double bond, length as m-dash]C...

Journal: :Inorganic chemistry 1998
Laba Karki Robert D. Williams Joseph T. Hupp Christian B. Allan Larry O. Spreer

Mixed-valence complexes (chemical species containing multiple metal centers that exist formally in more than one oxidation state) represent ideal models for testing and understanding optical and thermal electron transfer.1 Though the prototypical mixed-valence ion, the Creutz-Taube ion, was first studied over 25 years ago,2 new mixed-valence complexes continue to be made and studied. Among the ...

Journal: :The journal of physical chemistry. B 2010
Svetlana V Eliseeva Gerald Auböck Frank van Mourik Andrea Cannizzo Bo Song Emmanuel Deiters Anne-Sophie Chauvin Majed Chergui Jean-Claude G Bünzli

Multiphoton excited luminescent properties of water-soluble Eu(III) and Tb(III) complexes with derivatives of dipicolinic acid functionalized with a polyoxyethylene pendant arm and terminal groups, [Eu(L(OMe))(3)](3-), [Eu(L(NH2))(3)](3-), and [Tb(L(OH))(3)](3-), as well as of binuclear helicates with overall composition [Ln(2)(L(CX))(3)] (X = 2, 5) are investigated. Characteristic emission fro...

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