Ah, naming coordination compounds follows IUPAC rules: list ligands alphabetically before the metal, with oxidation state in Roman numerals. Colour comes from d-d transitions when ligands split the d-orbitals, and magnetism depends on whether it's high-spin or low-spin from the pairing energy. But in our crowded Delhi University lab, the real lesson is how the colour changes right before your eyes when you swap chloride for ammonia in a cobalt complex—it’s like magic, *nakki*. What the book doesn’t say is that sometimes the colour won’t match the theory because our lab’s chemicals are old and the water is impure, so you learn to trust your eyes over the page sometimes.
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