Table 3.
X-ray distances for metal-(bi)carbonate complexes. Both mono- and bi-dentate coordination modes are included
r(Metal-13C) in carbonate modes | (Cu-13C) Å | (Co-13C) Å | (Mn-13C) Å |
---|---|---|---|
Mono-dentate | 2.9a | 3.1b | 3.35c |
Bi-dentate | 2.4-2.5a | 2.3-2.4b | 2.75-2.9c |
2.75-2.95 (this work) |
Based on X-ray diffraction on single crystals of copper complexes: [Cu(HCO3)](aq), [Cu(CO3)](aq), [Cu(CO3)2]2-(aq) and Na2[Cu(CO3)2](s)50
Based on X-ray diffraction on single crystal of cobalt complexes: K2[CoII(H2O)4(CO3)2](s) for mono-dentate, [CoIII(NH3)4CO3]Br(s) for bi-dentate48
Estimated based on ionic radii (Co3+ = 0.63 Å, Co2+ = 0.74 Å, Cu2+ = 0.69 Å and Mn2+ = 0.80 Å)