Answer:-

Classification of coordination complexes can be based on the charge of the complex ion. Here’s a rephrased version of your text to avoid plagiarism:

i. Cationic Complex: A cationic complex, also known as a positively charged coordination sphere or coordination compound, is one in which the coordination sphere carries a net positive charge. For example, [Zn(NH3)4]2+ is a cationic complex.

ii. Anionic Complex: An anionic complex, or negatively charged coordination sphere, is a coordination compound where the coordination sphere bears a net negative charge. For instance, [Fe(CN)6]3− is an example of an anionic complex.

iii. Neutral Sphere Complex: Neutral sphere complexes are coordination complexes that do not possess an overall cationic or anionic charge in their coordination sphere. An example of a neutral sphere complex is [Ni(CO)4].

This classification is based on the net charge of the coordination sphere and helps describe the charge characteristics of different types of coordination complexes.