Structural Feature of an Hexakis-N-methylformamide Cobalt(II) Complex: Pseudo-S6 and Pseudo-C2 Complex Cations

摘要

The cobalt(II) complex [Co(NMF)₆](BPh₄)₂ [NMF = N-methylformamide] [hexakis(N-methylformamide-κO)cobalt(II) bis(tetraphenylborate)] was prepared, and characterized by a single-crystal X-ray method. The compound crystallizes in the triclinic space group P1 and Z = 4 with cell parameters: a = 10.9801(15)Å, b = 22.581(3)Å, c = 23.805(3)Å, α = 72.198(2)°, β = 87.088(2)°, γ = 88.497(3)°, V = 5612.0(13)Å3. Two types of [Co(NMF)₆]2+ cations are found in a crystal, and six NMF molecules coordinate to a cobalt(II) center in each cation. Interestingly, one has a pseudo-S₆ symmetry, and the other has a pseudo-C₂ symmetry.