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Abstract
A cobalt(II) complex with alkylisocyanide and triarylphosphine ligands is reported. Tris(cyclohexylisocyanide)bis(triphenylphosphine)cobalt(II) perchlorate, [Co(CNC6H11)3(PPh3)2](ClO4)2, was synthesized by PPh3 ligand-substitution in [Co(CNC6H11)4(AsPh3)2](ClO4)2 in which the distribution of product among [Co(CNC6H11)3(PPh3)2](ClO4)2, [Co(CNC6H11)3(PPh3)2](ClO4, [Co(OPPh3)4](ClO4)2, and unreacted [Co(CNC6H11)4(AsPh3)2](ClO4)2 was controlled in part by the concentration of PPh3 and reaction time. [Co(CNC6H11)3(PPh3)2](ClO4)2 was also synthesized by AgClO4 oxidation of [Co(CNC6H11)3(PPh3)2]ClO4. [Co(CNC6H11)3(PPh3)2](ClO4)2 is easily reduced to [Co(CNC6H11)3(PPh3)2]ClO4 with N2H4.H2O and decomposes into [Co(OPPh3)4](ClO4)2 on prolonged dissolution in CH2Cl2 solution, especially under UV (365 nm) irradiation. Physical properties for [Co(CNC6H11)3(PPh3)2](ClO4)2 and [Co(OPPh3)4](ClO4)2 support trigonal bipyramidal and tetrahedral solution and solid state stereochemistries, respectively, but both complexes have limited stability in most solvents.
Referee I: T. Burkey
Referee II: K. M. DeArmond
Notes
Referee I: T. Burkey
Referee II: K. M. DeArmond