CHEM102 Lecture Notes - Lecture 20: Coordination Complex, Diethylenetriamine, Numeral Prefix

• School: University of Alberta
• Department: Chemistry
• Course: CHEM102
• Professor: Camille Bowen-Forbes

Document Summary

Ligands- neutral molecules or anions with donor atoms: each donor atom donates a minimum of one pair of electrons and form a coordinate (covalent) bond with the metal ion. Metal ion- lewis-base donor (e pair accepter: monodentate ligands- single donor atom. Water, ammonia, fluride ion, chloride ion, cyanide ion (:c is the donor), thiocyanate ion (s=c=n anyone donates at a time), nitrite, hydroxide ion. Diethylenetriamine (3), triphosphate ion (3), edta4+ (6: bidentate and polydentate ligands give rise to rings in the complex ion. It is called a chelate: writing formulas. A complex cation or a complex anion with simple counterions. A complex cation with complex anion counterions. Cation (+) is written before the anion (-) in a complex ion. Charge of cation is balanced by the anion: naming coordination compounds. Ligands are named in alphabetical order before the metal ion. Numerical prefix is used to indicate number of ligands (di, tri, tetra etc)