Set includes: 4 Bromine Atoms, Framework Rods 8 Chlorine Atoms, Framework Rods 4 Fluorine Atoms, Framework Rods 30 Hydrogen Atoms, Framework Rods 10 Hydrogen Atoms, Space Filling 2 Iodine Atoms, Framework Rods Atom Centers 30 Carbon Atom Centers 6 Nitrogen Atom Centers 8 Oxygen Atom Centers Materials Assembly Instructions 25 Fasteners 12 Pieces Plastic Tubing

Molecular Design, Inc. Models. For constructing framework and/or space-filling molecular models of many compounds introduced in beginning organic chemistry courses. Excellent for demonstrating optical isomers (chirality); cistrans configurational isomers; boat and chair conformations; carbocyclic compounds; and tetrahedral, trigonal, and linear geometries. Van der Waals radii are represented to precise scale (25 mm=1 Angstrom unit) in atom centers (carbon, nitrogen, and oxygen), framework atoms (hydrogen and halogens), and the space-filling hydrogen atom attachment (50 mm diam).

All atoms are color-coded, sturdy plastic components. A unique fastener attaches one atom center to another. Flexible plastic tubing is used to fabricate pi bonds and it replaces the fastener wherever a bond angle is necessarily distorted, as in certain cyclic structures. And instructional booklet provides examples of models that visualize stereochemical concepts.