126107-05-9Relevant academic research and scientific papers
Reaction of CH2O with [Co(PMe3)4]X (X = PF6 and BPh4). Structural characterization of [Co(CO)(PMe3)4]PF6 and the nonstoichiometric complex [CoH2-2x(CO)x(PMe3)4]BPh4
Pérès, Yolande,Dartiguenave, Michèle,Dartiguenave, Yves,Britten, James F.,Beauchamp, André L.
, p. 1041 - 1047 (2008/10/08)
[Co(PMe3)4]PF6 reacts with formaldehyde to form [Co(CO)(PMe3)4]PF6, which is shown by X-ray diffraction (P21/n, a = 11.280, b 14.948, c = 14.088 ?, β = 90.69°, Z = 4, R = 0.029) to contain trigonal-bipyramidal cations with CO in the equatorial position. From [Co(PMe3)4]BPh4, [Co(CO)(PMe3)4]BPh4 is formed in low yield. The major product is crystallographically characterized (P21, a = 15.985, b = 12.512, c = 20.410 ?, β = 111.76 (3)°, Z = 4, R = 0.048) and found to contain the cis-octahedral Co(III) dihydrido species [CoH2(PMe3)4]+ and the Co(I) cation [Co(CO)(PMe3)4]+ with CO in the axial position. These two ions are disordered over the cationic sites in the crystal. The presence of these species in the nonstoichiometric material is also indicated by infrared and NMR data on the compound and its 2H- and 13C-labeled derivatives.
