CHEM 332 Lecture Notes - Lecture 2: Repeat Unit, Bioavailability, Jmol

• School: McGill University
• Department: Chemistry
• Course: CHEM 332
• Professor: Tomislav Friscic

Document Summary

Solids are built up of molecules and molecular properties are determined by functional groups. Solid state properties depend on the nature of the solid that has formed: molecular structure + structure of molecular assembly solid state properties of a material. Is there order within a crystal: low order o amorphous or random arrangement. Usually higher in energy, thus less stable. Referred to as a glass or rubber. Creation of an amorphous material can be known as vitrification (latin to make glass) No truly perfectly disordered/random material due to isotropes and the inherent shape of the molecules (planar axis in benzene) Local organization sites can serves as nucleation sites for crystallization (teach other sites to organize: high order o crystalline or 3 dimensional periodicity. Will revert to amorphous with the addition of energy: the solid state is dynamic in that the internal structure can interconvert between amorphous or crystalline. Usually low activation energy- organic glasses crystallize easily.