BENSLEY, DENNIS M. (JR);MINTZ, ERIC A., J. ORGANOMET. CHEM., 353,(1988) N 1, C. 93-102
作者:BENSLEY, DENNIS M. (JR)、MINTZ, ERIC A.
DOI:——
日期:——
Davies, Alwyn G.; Goddard, Jeffrey P.; Lusztyk, Ewa, Journal of the Chemical Society. Perkin transactions II, 1982, p. 737 - 744
作者:Davies, Alwyn G.、Goddard, Jeffrey P.、Lusztyk, Ewa、Lusztyk, Janusz
DOI:——
日期:——
Nmr spektroskopie an paramagnetischen komplexen
作者:F.H. Köhler、K.H. Doll、W. Prössdorf
DOI:10.1016/s0022-328x(00)93175-9
日期:1982.1
The paramagnetic metallocenes (EtMe4)Cp2M, M V, VBr, Cr, Co, Ni have been synthesized starting from the THF adducts of MCl2. A detailed 1H and 13C NMR study shows that there are two main effects of peralkylation: a change in redox properties and steric repulsion. The reducing power for M Co, Ni is enhanced and hindered rotation is found for the ethyl group with Cβ being turned away from the metal
从MCl 2的THF加合物开始合成顺磁性茂金属(EtMe 4)Cp 2 M,M fromV,VBr,Cr,Co,Ni 。详尽的1 H和13 C NMR研究表明,过烷基化有两个主要作用:氧化还原特性的改变和空间排斥。MCo,Ni的还原能力增强,并且在Cβ远离金属的情况下,发现乙基的旋转受阻。Cβ允许选择性地确定配体π系统中电子自旋密度的符号。这提供了一种常规的方法来研究自旋离域化,如弯曲的钒钒烯所示。讨论了NMR分析的局限性。