Reaction of 1,6-cyclodecadiyne and 1,8-cyclotetradecadiyne with substituted CpCo(cod)
摘要:
The yields of CpCo-capped cyclobutadiene superphane from 1,6-cyclodecadiyne (1) and (R-C5H4)Co(cod) varies considerably with the substituents R. Electron-withdrawing substituents give yields between 35 and 45 % while electron-donating substituents give very small yields. In the case of 1,8-cyclotetradecadiyne (2) such a dependence on R is much less pronounced. The reaction between 1 and 2 and the indenyl complex (eta5-C9H7)Co(cod) is also reported.
The preparation of finely divided metal powders and transition metal complexes using “organically solvated” magnesium
作者:Helmut Bönnemann、Borislav Bogdanović、Rainer Brinkmann、Bernd Spliethoff、Da-Wei He
DOI:10.1016/0022-328x(93)83004-f
日期:1993.6
Mg★ is an excellent in situ reducing agent for transition metal salts, giving highly reactive metal powders of Groups 8–12. In the presence of electron donor ligands, this reduction provides a useful one-step route to organotransition metal complexes. The application of 35 kHz ultrasound during the reaction improves the dispersity of the metal powders and enhances the yields of the complexes.