نتایج جستجو برای: lanthanide halides

تعداد نتایج: 7935  

2014
Matthew J Langton Octavia A Blackburn Thomas Lang Stephen Faulkner Paul D Beer

The first anion-templated synthesis of a lanthanide-containing interlocked molecule is demonstrated by utilizing a nitrite anion to template initial pseudorotaxane formation. Subsequent stoppering of the interpenetrated assembly allows for the preparation of a lanthanide-functionalized [2]rotaxane in high yield. Following removal of the nitrite anion template, the europium [2]rotaxane host is d...

Journal: :Journal of Chemical Education 1976

Journal: :Acta Crystallographica Section A Foundations of Crystallography 1993

Journal: :CrystEngComm 2021

Reactions in water between lanthanide chlorides and the di-sodium salt of 2-hydroxyterephthalic acid (H2hbdc) lead to six families lanthanide-based coordination polymers depending on ion crystal growth method.

A highly efficient Ullmann homocoupling reaction of aryl halides using palladium (II) phosphine-ylide complexes as homogenous pre-catalysts under aerobic conditions has been developed without the need for any chemical co‐reducing agents. The procedure is relatively mild and appears to have broad applicability, being useful for the homocoupling of both electron-deficient and electron-rich aryl h...

Journal: :Inorganica Chimica Acta 2021

Crystal growths in gel medium of lanthanide-based coordination polymers with 2,5-dihydroxyterephthalate (dhbdc2−) as ligand lead to two different crystal structures depending on the lanthanide ion. Lanthanide-based that crystallize these structural type have respective chemical formulas [Ln2(dhbdc)3(H2O)12·6H2O]∞ Ln = La-Nd, and [Ln2(dhbdc)3(H2O)8·6H2O]∞ Sm-Yb plus Y. Only Nd-based Yb-based exh...

Journal: :Nature Chemical Biology 2018

2005
Andrew Tigchelaar William Tam

Iridium-catalyzed intramolecular [4 + 2] cycloadditions of diene-tethered alkynyl halides were investigated by using [IrCl(cod)](2) as catalyst, and dppe was found to be the most suitable phosphine ligand for the reaction. No oxidative insertion of the iridium into the carbon-halide bond was observed, and the reactions proceeded to provide the halogenated cycloadducts in good yield (75-94%). Th...

2006
Jun Terao Nobuaki Kambe

This account reviews transition metal-catalyzed C–C bond formation reactions using alkyl halides, which have rarely been used as carbon sources in conventional transition metal-catalyzed systems. In the reactions, ate complexes formed by the reaction of transition metals with a Grignard reagent play important roles as the active catalytic species. The reactions mentioned here are mechanisticall...

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