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Question
Answer the following question.
What are cationic, anionic, and neutral complexes? Give one example of each.
Solution
On the basis of charge on complex ion, coordination complex is classified as:
i. Cationic complex: A positively charged coordination sphere or a coordination compound having a positively charged coordination sphere is called the cationic complex or cationic sphere complex.
e.g. [Zn(NH3)4]2+
ii. Anionic complex: A negatively charged coordination sphere or a coordination compound having a negatively charged coordination sphere is called an anionic complex or anionic sphere complex.
e.g. [Zn(CN)6]3–
iii. Neutral sphere complexes: A coordination complex that does not possess a cationic or anionic sphere are neutral complexes of neutral sphere complexes.
e.g. [Ni(CO)4]
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