Consider the complex with the formula K[Co(NH₃)₆](CO₃)₂.
i. Provide the name of the compound.
ii. Calculate the oxidation number of Co.
iii. Sketch its crystal field energy-level diagram.
iv. Classify the complex as either high-spin or low-spin.
v. Identify the number of unpaired electrons, if any

i. +3

ii.potassium hexaamminecobalt(III)carbonate

iii.

.

iv.low-spin complex

v.0 unpaired electrons

i. +2

ii.potassium hexaamminecobaltate(II)dicarbonate

iii.

iv.high-spin complex

v.3 unpaired electrons

i. +3

ii.potassium hexaamminecobalt(III)carbonate

iii.

iv.high-spin complex

v.3 unpaired electrons

i. +2

ii.potassium hexaamminecobaltate(II)dicarbonate

iii.

.

iv.low-spin complex

v.0 unpaired electrons