For 10 points, give this name for an atom or molecule that bonds to a central metal atom in a coordination complex.
One of these is termed non-innocent if it can exist in multiple oxidation states, and Zeise's salt contains one of these were backbonding places d electrons in a pi antibonding orbital. The concept of hapticity is used to describe the structure of one of these in a bond, which can also be described by a "bite angle," and ones termed labile are easily reactive. Polydentate ones form bonds over several sites and are termed chelating [KEE-lating], an example of which is EDTA. For 10 points, give this name for an atom or molecule that bonds to a central metal atom in a coordination complex.
One of these is termed non-innocent if it can exist in multiple oxidation states, and Zeise's salt contains one of these were backbonding places
{ligand} [accept {chelate} or {chelating agent} until “{polydentate ones}”; {then} prompt on it until mentioned]