207291-66-5Relevant academic research and scientific papers
Synthesis and reactions with CO and C2H4 of Cobalt(I) complexes containing trimethylphosphine and chelating o-Diphenylphosphanylphenolate ligands
Klein, Hans-Friedrich,Brand, Alexandra,Cordier, Gerhard
, p. 307 - 314 (2007/10/03)
In tetracoordinate cobalt(I) halide compounds CoX(Ph2P∩OH)(PMe3)2 (X = Cl, Br) o-phosphanylphenols Ph2P∩OH are coordinated as phosphane ligands. In the presence of base chelating anions Ph2P∩O- give rise to pentacoordinate complexes Co(Ph2 P∩O)(PMe3)3. Molecular structures are presented for both types of compounds. The five-membered chelate ring in Co(Ph2P∩O)(PMe3)3 is resistant to protonation, and ring-opening is not observed in the presence of CO or C2H4. Replacing one of the trimethylphosphanes by one of the π-acceptor ligands affords fluxional complex molecules which upon cooling attain definite ground-state geometries out of a multitude of possible isomers.
