When a transition metal acts as a reducing agent, it donates electrons, resulting in a decrease in its oxidation state.

In an octahedral complex, the coordination number is 6, as there are six ligands surrounding the central metal atom.

The coordination number of the metal ion in [Co(NH3)6]Cl3 is 6, as it is surrounded by six ammonia ligands.

Ligands provide electron pairs to the metal center, forming coordinate covalent bonds and stabilizing the metal complex.

In coordination complexes, the bond formed between a transition metal and a ligand is primarily a coordinate covalent bond, where the ligand donates a pair of electrons.

Reduction of a transition metal complex involves the gain of electrons, which is the definition of a reduction reaction.

Coordination compounds are commonly used in chemotherapy drugs, such as cisplatin, which is used to treat various cancers.

Cyanide (CN-) is a strong field ligand that causes greater splitting of d-orbitals in transition metal complexes.

Iron is the transition metal used as a catalyst in the Haber process for synthesizing ammonia from nitrogen and hydrogen.

Iron is used as a catalyst in the Haber process to synthesize ammonia from nitrogen and hydrogen.

Copper is a transition metal that forms colored compounds due to the presence of partially filled d-orbitals, allowing for d-d electron transitions.

Iron is a transition metal that is commonly associated with the formation of colored compounds due to its variable oxidation states.

Copper is known for its ability to form complex ions and plays a crucial role in biological systems, such as in hemocyanin.