Thorium(IV) and Uranium(IV) Halide Complexes Supported by Bulky β-Diketiminate Ligands
作者:Marisa J. Monreal、Robert J. Wright、David E. Morris、Brian L. Scott、Jeffery T. Golden、Philip P. Power、Jaqueline L. Kiplinger
DOI:10.1021/om3010965
日期:2013.3.11
β-diketiminate complex (LtBu)Th(C5H4Me)Br2 (10). Complexes 7–11 represent rare examples of thoriumcomplexes featuring only one β-diketiminate ligand, and complexes 9–11 are the first examples of thorium and halide complexes supported by the LtBu framework. In a similar manner, both K[LMe] and K[LtBu] were shown to react with UCl4 to give the corresponding mono(β-diketiminate)uranium(IV) chloride complexes (LMe)UCl3(THF)
Reaktionen von carbonylcyclopentadienylhydriden von molybdän und wolfram mit α-aminoacetylenen.II
作者:Harald Brix、Wolfgang Beck
DOI:10.1016/s0022-328x(00)85852-0
日期:1982.8
Insertion of α-aminoacetylenes R1CCNR22 into the metal hydrogen bond of the complexes (η5-L)(η1-L)(CO)2MH (M Mo,W; η5-L C5H5, MeC5H4, indenyl; η1-L CO, phosphite) gives η1-aminovinyl complexes (III) which could be iso lated with η1-L phosphite. CO insertion into the metalvinyl bond yields the η3-acryloyl complexes (IV), which isomerize at higher temperatures for M W and R1 Me, Me3Si;
Raman spectroscopy of the N–N bond in rare earth dinitrogen complexes
作者:Megan E. Fieser、David H. Woen、Jordan F. Corbey、Thomas J. Mueller、Joseph W. Ziller、William J. Evans
DOI:10.1039/c5dt04547a
日期:——
over 20 different rareearthcomplexes containing reduced dinitrogen ligands to determine if these data will correlate with periodic properties or relative stability. Four types of complexes were examined: [(C5Me5)2Ln]2(μ–η2:η2-N2), 1-Ln, [(C5Me4H)2(THF)Ln]2(μ–η2:η2-N2), 2-Ln, [(C5H4Me)2Ln]2(μ–η2:η2-N2), 3-Ln, and [(Me3Si)2N]2(THF)Ln}2(μ–η2:η2-N2), 4-Ln. Although each of the complexes contains a side-on
Tetrahedral versus square planar arrangement of cyclopentadienyl ligands in bimetallic organosamarium complexes. X-ray crystal structure of [(C5H4Me)2(THF)Sm(μ-Cl)]2
作者:William J. Evans、Roy A. Keyer、Joseph W. Ziller
DOI:10.1016/0022-328x(93)80146-3
日期:1993.5
of cyclopentadienyl ring size on the geometry of bimetallic organosamarium complexes have been studied by comparing the X-raycrystalstructure of [(C5H4Me)2(THF)Sm(μ-Cl)]2, prepared from KC5H4Me and SmCl3 in THF, with C5Me5 analogs. The complex crystallizes from THF at −30°C in space group Pbcn with a = 20.312(5), b = 9.626(2), c = 16.225(3) Å, V = 3172.5(12) Å3 and Dcalc = 1.74 g cm−3 for Z = 4. Least-squares
通过比较由KC 5制备的[(C 5 H 4 Me)2(THF)Sm(μ-Cl)] 2的X射线晶体结构,研究了环戊二烯基环大小对双金属有机sa配合物的几何形状的影响。H 4 Me和SmCl 3在THF中的溶液,以及C 5 Me 5类似物。从THF中结晶复杂在-30℃下,在空间群Pbcn与一个= 20.312(5),b = 9.626(2),C ^ = 16.225(3)埃,V = 3172.5(12)一种3和d计算值= 1.74克厘米-3当Z = 4时。基于1759个反射的模型的最小二乘法精化[| F o | >2.0σ(| F o |)]收敛到最终R F = 5.0%。该络合物采用具有垂直于Sm 2 Cl 2平面的分子两倍旋转轴和晶体学反转中心的几何形状。因此,每个(C的两个甲基基团5 ħ 4 Me)的2的Sm部位于相反侧的THF配位体,它们是的反式彼此,和四号丙5 ħ 4Me环质心定义一个正方形平面。SmCl距离为2
Isolation of reactive Ln(<scp>ii</scp>) complexes with C<sub>5</sub>H<sub>4</sub>Me ligands (Cp<sup>Me</sup>) using inverse sandwich countercations: synthesis and structure of [(18-crown-6)K(μ-Cp<sup>Me</sup>)K(18-crown-6)][Cp<sup>Me</sup><sub>3</sub>Ln<sup>II</sup>] (Ln = Tb, Ho)
作者:Daniel N. Huh、Joseph W. Ziller、William J. Evans
DOI:10.1039/c8dt03890b
日期:——
We report that crystallographically-characterizable Ln(ii) complexes of Tb and Ho can be isolated by reducing CpMe3Ln(THF) with KC8 in THF in the presence of 18-crown-6 (18-c-6).