Dimethoxysilylene (2) reacts with acetylene or dimethylacetylene to form 1,4-disalacyclohexadienes in very good yields. The known addition reactions of dichloro- or dimethylsilylene with olefins cannot be carried out, with the exception of the addition to 2,3-dimethylbutadiene.
X-ray single-crystal structure analysis. NMR spectroscopic analysis of some Yb–silyl complexes pointed at highly ionic interactions between the silyl ligands and the lanthanides. This bonding picture was supported by DFT calculations at the B3PW91/Basis1 level of theory. Detailed theoretical analysis of a disilylated Eu(II) complex suggests that its singly occupied molecular orbitals (SOMOs) are very
Synthesis, characterization and properties of some organozinc hydride complexes
作者:A.J. De Koning、J. Boersma、G.J.M. Van Der Kerk
DOI:10.1016/s0022-328x(00)93381-3
日期:1980.8
The synthesis and characterization of the monopyridine complexes of ethylzinc hydride and phenylzinc hydride are described. On treatment with TMED these complexes are converted into R2Zn3H4. TMED species through a combination of ligand-exchange and disproportionation. The formation of organozinc hydrides from ω-functionally-substituted diorganozinc compounds is only successful when the intramolecular
描述了乙基锌氢化物和苯基锌氢化物的单吡啶配合物的合成和表征。经TMED处理后,这些络合物转化为R 2 Zn 3 H 4。。TMED物种通过配体交换和歧化相结合。仅当这些原料中的分子内配位作用弱且容易被吡啶破坏时,才可以成功地从ω-官能取代的二有机锌化合物形成有机锌氢化物。这些研究的结果用作讨论控制稳定有机锌氢化物形成的因素的基础。RZnH.py配合物很容易还原酮和醛,但在取代环己酮的还原中未观察到异常的立体选择性。EtZnH.py与过量的吡啶反应,形成乙基(1,4-二氢-1-吡啶基)锌(一种可溶于苯的单体)的双吡啶配合物。但是,不能分离出相应的苯基锌配合物。与PH不成比例2 Zn.2py和双(1,4-二氢-1-吡啶基)锌的双吡啶配合物出现。
Chemistry of organosilicon compounds. 108. Efficient trapping of silylenes through disilene intermediates
The first vertical ionization energies of dialkylethers are lowered up to 3 eV (!) by beta-trimethylsilyl substituents and, therefore, further confirm the powerful electron donor effect of -CH3-n[Si(CH3)3]n and -Si[Si(CH3)3]3 groups. The gas-phase photoelectron spectra are assigned based on geometry-optimized MNDO calculations and the substituent effects are discussed in terms of conformationally dependent hyperconjugative second order perturbations.