环戊二烯基环易位发生在甲苯中的[Ca(C 5 Me 5)2 ]和[Ln(C 5 H 5)3 ]络合物之间,从而生成混合环化合物[Ln(C 5 Me 5)2(C 2 H 5) ](Ln 1 -La,1 -Nd)。1- Nd已经通过X射线衍射表征为空间上拥挤的单体。[Ca(C 5 Me 5)2(thf)x ]和[La(C 5 H 5)之间仅交换一个环在甲苯中的3(thf)x ]产生[La(C 5 Me 5)C 5 H 5)2(thf)](2)。与[M(C 5 H 5)2 ](MSn,Pb,Mn)反应,[Ca(C 5 M 5)2(thf)x ]产生相应的[M(C 5 Me 5)2 ]配合物。K [C 5 Me 5 ]与[La(C 5 H 5)3(thf)],[Sn(C 5 H 5)2 ]和[Pb [C 5 H 5)2 ]在甲苯中分别得到环交换产物2,[Sn(C 5 Me 5)2 ]和[Pb(C 5
Spectroscopy of unstable complexes of organometallic compounds with small molecules at low temperatures
作者:B.V. Lokshin、I.I. Greenwald
DOI:10.1016/0022-2860(90)80003-3
日期:1990.5
Abstract Using IR spectroscopy, evidence has been obtained that organometalliccompounds of transition metals (metallocenes, arenemetaltricarbonyls) and of non-transition elements (alkyl derivatives of II–V group elements) are capable of forming unstable complexes with small molecules (N 2 , O 2 , H 2 , CH 4 ), which can be stabilized at low temperatures. The structure determination of the complexes
A Family of Decamethylmetallocene Charge-Transfer Salt Magnets Using Methyl Tricyanoethylenecarboxylate (MTCE) as the Electron Acceptor
作者:Guangbin Wang、Carla Slebodnick、Ray J. Butcher、Mary C. Tam、T. Daniel Crawford、Gordon T. Yee
DOI:10.1021/ja0457213
日期:2004.12.1
one-electron acceptor building block for the synthesis of isomorphous decamethylmetallocene charge-transfersalt magnets of the formula [MCp*2][MTCE], M = Cr, Mn, and Fe. Functionally and electrochemically, MTCE is a hybrid between tetracyanoethylene (TCNE) and dimethyl dicyanofumarate (DMeDCF), two acceptors that have previously been found to support ferromagnetism. The X-raycrystalstructure of the chromium
三氰基乙烯羧酸甲酯 (MTCE) 已被用作单电子受体构件,用于合成式 [MCp*2][MTCE]、M = Cr、Mn 和 Fe 的同晶十甲基茂金属电荷转移盐磁体。在功能和电化学方面,MTCE 是四氰基乙烯 (TCNE) 和二氰基富马酸二甲酯 (DMeDCF) 的混合物,这两种受体以前已被发现支持铁磁性。铬类似物的 X 射线晶体结构 [CrCp*2][MTCE] 表明它存在于正交空间群 Pnma 中预期的混合堆叠结构中,a = 14.739(3) A, b = 10.7869(19 ) A 和 c = 15.771(3) A 和 Z = 4。正如预期的那样,所有三个家族成员都表现出占主导地位的铁磁耦合,据推测这反映了叠内相互作用。然而,体磁特性主要不同于对其 TCNE 和 DMeDCF 类似物特性的简单内插或外推。密度泛函理论计算已被用于阐明这一观察结果。
Design and Synthesis of a Library of Molecule-Based Magnets: The Charge-Transfer Salt Approach
作者:Bharat B. Kaul、Bruce C. Noll、Gordon T. Yee
DOI:10.1006/jssc.2001.9174
日期:2001.7
The rules governing magnetic coupling in molecule-based materials are still being defined. Until they are clear, synthetic efforts should ideally yield many new candidate magnets for a minimal investment of time and effort. One approach that satisfies this requirement is the synthesis of magnetic charge-transfersalts from metallocenes and easily identifiable organic acceptors. This strategy offers
Structural characterization of potassium salts of the decamethylmanganocene anion Cp*<sub>2</sub>Mn<sup>−</sup>
作者:Moritz Malischewski、Konrad Seppelt
DOI:10.1039/c9dt03551f
日期:——
For the first time the crystal structure of a permethylated metallocene anion has been obtained. The 17 valence electron complex decamethylmanganocene Cp*2Mn is reduced by molten potassium in THF to its extremely air-sensitive anion [Cp*2Mn]−. The potassium salt [K(THF)2]+[Cp*2Mn]− crystallizes upon cooling from hot THF and forms infinite polymeric chains exhibiting strong K⋯C contacts. In the presence