CHEM 110 Lecture Notes - Lecture 34: Square Planar Molecular Geometry, Diethylenetriamine, Ethylenediamine

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Laura Pavelka

Document Summary

Why does the transition happen in the visible range. Cucl2 is brown, then blue in water. Cubr2 is black, and blue in water. Transition metal as central atom (lewis acid) Transition metal accepts electrons in d orbitals. If charged, surrounded by a counter cation or anion. Same with square planar (4 instead of 6) Molecules or anions which donate electron pairs. Monodentate or polydentate = # of binding sites. Water is mono, despite having 2 lone pairs, because it will only make one bond. Identify transition metal, then identify charge in all ligands. Polydentate with greek prefix gets bis, tris, tetrakis, pentakis tris(ethylenediamine) Named alphabetically by prefix minus greek number. Anionic ligand before neutral ligand in formula. Write oxidation state at end in roman numerals. Ion as a ligand or as a counter ion. Which atom is bonded to the central atom. Not bidentate, only one will bind to central atom. Swapping linkage between ligand donor and atom.