نتایج جستجو برای: dissymmetric dinuclear complexes

تعداد نتایج: 138514  

Journal: :Chemical communications 2005
Kenji Hirata Toshiaki Suzuki Ai Noya Izuru Takei Masanobu Hidai

The reactions of [Cp*MCl2]2(Cp*=eta5-C5Me5, M = Rh, Ir) with thiacalix[4]arene (TC4A(OH)4) and tetramercaptothiacalix[4]arene (TC4A(SH)4) gave the mononuclear complexes [(Cp*M){eta3-TC4A(OH)2(O)2}] and the dinuclear complexes [(Cp*M)2{eta3eta3-TC4A(S)4}] respectively, while the analogous reactions with dimercaptothiacalix[4]arene (TC4A(OH)2(SH)2) produced the tetranuclear complexes [(Cp*M)2(Cp*...

Journal: :Inorganic chemistry 2006
Stefano Stagni Antonio Palazzi Stefano Zacchini Barbara Ballarin Carlo Bruno Massimo Marcaccio Francesco Paolucci Magda Monari Maurizio Carano Allen J Bard

A new family of mono- and dinuclear ruthenium polypyridyl complexes containing 5-aryltetrazolate ligands such as the deprotonated form of 4-(1H-tetrazol-5-yl)benzonitrile (4-TBNH) and bis(1H-tetrazol-5-yl)benzene (BTBH(2)) have been synthesized and thoroughly characterized. The reactivity of the mononuclear species toward different electrophiles such as H(+) and CH(3)(+) has been investigated, ...

Journal: :The Journal of pharmacology and experimental therapeutics 2003
Alberta Bergamo Gabriele Stocco Barbara Gava Moreno Cocchietto Enzo Alessio Barbara Serli Elisabetta Iengo Gianni Sava

We have examined the biological and antitumor activity of a series of dinuclear ruthenium complexes. The aim of this study was to compare the in vitro effects of these new compounds on cell proliferation, cell distribution among cell cycle phases, and the expression of some proteins involved in cell cycle regulation. Results obtained show a mild cytotoxic activity against human and murine cell ...

Journal: :Journal of the American Chemical Society 2003
Hannes Spillmann Alexandre Dmitriev Nian Lin Paolo Messina Johannes V Barth Klaus Kern

We demonstrate the rational design of nanoporous two-dimensional supramolecular structures by the hierarchical assembly of organic molecules and transition metal atoms at surfaces. Single-molecule level observations with scanning tunneling microscopy monitor the successive aufbau of structures with increasing complexity. From the primary components secondary mononuclear chiral complexes are for...

Journal: :Dalton transactions 2016
Shi Jiang Samuel Quintero-Duque Thierry Roisnel Vincent Dorcet Mary Grellier Sylviane Sabo-Etienne Christophe Darcel Jean-Baptiste Sortais

A new and efficient method based on the simple metalating reagent Fe(CO)5 has been developed for the straightforward synthesis of well defined cyclometalled PCP iron carbonyl pincer complexes. The reaction proceeds cleanly under mild conditions at 30 °C and UV irradiation. Four hydride pincer complexes are synthesized and fully characterized as well as an intermediate dinuclear species. The new...

Journal: :Chemical communications 2015
Yusuke Kita Kosuke Higashida Kenta Yamaji Atsuhiro Iimuro Kazushi Mashima

Asymmetric hydrogenation of quinazolinium salts was catalysed by halogen-bridged dinuclear iridium complexes bearing chiral diphosphine ligands, yielding tetrahydroquinazoline and 3,4-dihydroquinazoline with high enantioselectivity. A derivative of chiral dihydroquinazoline was used as a chiral NHC ligand.

Journal: :Dalton transactions 2008
Martin Jarenmark Sascha Kappen Matti Haukka Ebbe Nordlander

Dinuclear carboxylate-bridged zinc complexes of one symmetric and one asymmetric phenolate-based ligand catalyse the transesterification of 2-hydroxypropyl-p-nitrophenyl phosphate (HPNP) at different rates, with an unsymmetrical complex being more active than a symmetric one.

Journal: :Chemical communications 2013
Tina M Konrad Jamie T Durrani Christopher J Cobley Matthew L Clarke

Using a family of novel mononuclear and dinuclear palladium complexes of phanephos ligands, the simultaneous control of regioselectivity and enantioselectivity in the hydroxycarbonylation and alkoxycarbonylation of styrene derivatives has been realised for the first time.

Journal: :Dalton transactions 2009
Christian Radloff Jan J Weigand F Ekkehardt Hahn

A tetranuclear molecular rectangle consisting of two bridging dicarbene ligands and two bridging diphosphine ligands was prepared by connection of two dinuclear gold(I) complexes with 1,2-bis(diphenylphosphino)ethane.

Journal: :Dalton transactions 2015
Chui-Shan Tsang Lingjing Chen Lu-Wei Li Shek-Man Yiu Tai-Chu Lau Hoi-Lun Kwong

The pyridine-containing ligands and react with Ni(2+) ions to afford dinuclear triple-stranded helicate and tetrahedral cage supramolecular complexes, respectively; the two architectures exhibit contrasting reactivity towards electro- and photocatalytic proton reduction.

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