211505-72-5Relevant academic research and scientific papers
Facile C-N bond cleavage mediated by electron-rich cyclopentadienyl cobalt(I) complexes
Werner, Helmut,Hoerlin, Gerhard,Jones, William D.
, p. 45 - 51 (1998)
The reaction of [C5H5Co(PMe3)2] (1) with one equiv of CNCH2Ph leads to the formation of the substitution product [C5H5Co(CNCH2Ph)(PMe3)] (2) which even at room temperature undergoes an intramolecular oxidative addition to give the isomer [C5H5Co(CN)(CH2Ph)(PMe3)] (4). The corresponding Cp*Co derivative [C5Me5Co(CN)(CH2Ph)(PMe3)] (8) is obtained from [C5Me5Co(PMe3)2] (5) and CNCH2Ph. In contrast to 2, the analogous compound [C5H5Co(CNTol)(PMe3)] (6) is quite inert and does not react by N-C bond cleavage. The conversion of 2 to 4 in C6D6, acteone-d6 and methanol-d4 follows first order kinetics with a rate that is almost independent of the concentration of free PMe3. Both 2 and 6 react with Ph2CN2 to give the C,C-bound ketenimine complexes [C5H5Co(κ2-C,C-Ph2C=C=NR)(PMe3)] (9, 10) of which that with R=Tol rearranges thermally to the more stable N,C-bound isomer 11.
