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Coordination Compounds — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds3 Marks
Question
Explain cationic, anionic and neutral sphere complexes with example.
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Answer

1. Cationic Complexes: A cationic sphere complex is a coordination compound with a positively charged coordination sphere.
For example: $\left[ Co \left( NH _3\right)_5 Cl \right] SO _4 \rightleftharpoons\left( Co \left( NH _3\right)_5 Cl \right)^{2+}+ SO _4^{2-}$
2. Anionic Sphere Complexes: An anionic complex is a coordination compound with a negatively charged coordination sphere.
For example: $\left[ Ni ( CN )_4\right]^{2-} K _3\left[ Fe ( CN )_6\right] \rightleftharpoons 3 K ^{+}+\left[ Fe ( CN )_6\right]^{3-}$
3. Neutral Sphere Complexes: A neutral coordination complex lacks cationic or anionic spheres.
For example: $\left[ Pt \left( NH _3\right)_2 Cl _2\right],\left[ Ni ( Co )_4\right]$

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