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.
Control of the Catalytic Synthesis of Pyridine from Alkynes and Nitriles by the (η6-Borinato)-Nigands at Cobalt
吡啶的从炔烃和腈的催化合成的控制由(η 6 -Borinato)-Nigands在钴
Reaction of 1,6-cyclodecadiyne and 1,8-cyclotetradecadiyne with substituted CpCo(cod)
作者:Rolf Gleiter、Georg Pflaesterer
DOI:10.1021/om00029a051
日期:1993.5
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.
A correlation between 13C and 59Co NMR data and the catalytic activity of organocobalt complexes in the synthesis of pyridine derivatives
作者:Helmut Bönnemann、Werner Brijoux、Rainer Brinkmann、Willi Meurers、Richard Mynott、Wolfgang Von Philipsborn、Thomas Egolf