Build octasulfur, S8, with the Indigo® 68821W point group molecular model kit to demonstrate D4d point group symmetry and puckered crown ring geometry. Ideal for undergraduate and advanced inorganic chemistry and spectroscopy courses.
The Indigo® 68821W model kit builds octasulfur, S8, a stable allotrope of elemental sulfur. The puckered crown ring model shows D4d symmetry elements that include the principal C4 rotation axis, four C2 axes perpendicular to it, an S8 improper rotation axis, and four dihedral mirror planes σd. Cyclooctasulfur derivatives and substituted crown ring structures are also characteristic of the D4d point group.
Indigo Instruments has held inventory of genuine Cochranes of Oxford (Orbit) parts for 30+ years (see "Skeletal (Orbit/Minit)) that are compatible with every molecular model set/kit we have sold since day 1. This level of quality may appear expensive but no parts support from other vendors costs even more.
The 68845NV Foundation (basic) chemistry model set and the 68827W chemistry advanced organic chemistry molecular model set can build some of the point groups shown above as can the 68847W class organic-inorganic molecular model set. These sets can be customized for other courses in inorganic chemistry & biochemistry. Contact us with your details. Minimum order quantities may apply.
Note: the parts listed below apply to the entire kit not the specific model referred to on this page.
| P/N | Description | QTY |
|---|---|---|
| 68186-20 | Wobbly bond, 20mm, each | 104 |
| 68186-25 | Wobbly bond, 25mm, each | 10 |
| 68186-30 | Wobbly bond, 30mm, each | 52 |
| 68186-35 | Wobbly bond, 35mm, each | 39 |
| 68186-50 | Wobbly bond, 50mm, each | 10 |
| 68216C | Atom, Orbit, H "a", white, 1 prong | 95 |
| 68217C | Atom, Orbit, N "a", blue, 1 prong | 2 |
| 68219C | Atom, Orbit, F "a", light green, 1 prong | 15 |
| 68221C | Atom, Orbit, Cl "a", green, 1 prong | 16 |
| 68228C | Atom, Orbit, S "c", 100 degree, yellow | 8 |
| 68230C | Atom, Orbit, O "d", 110 degree, red | 8 |
| 68241C | Atom, Orbit, C "j", planar: 120-120-120, black | 1 |
| 68244C | Atom, Orbit, C "k", tetrahedral, black | 50 |
| 68245C | Atom, Orbit, N "k", tetrahedral, blue | 8 |
| 68247C | Atom, Orbit, P "k", tetrahedral, purple | 1 |
| 68255C | Atom, Orbit, S "l", octahedral, yellow | 1 |
| 68258C | Atom, Orbit "l", octahedral, grey | 3 |
| 68259C | Atom, Orbit, C "m", trigonal bipyramidal, black | 11 |
| 68505C | 2 |
Many thanks to Alyssa Doue of Mt. St. Vincent University in Halifax, Nova Scotia who says: "I've built the point groups and they're awesome!" Click on her Google Review for more.
This model set has the flexibility needed to teach symmetry point groups effectively, as well as modeling metal coordination complexes. Some atoms have holes perpendicular to their main bonds, allowing for modeling H-bonds or electrostatic interactions. Construction-wise, atoms pieces are smaller relative to the bond pieces, emphasizing the relative space taken up by orbitals compared to nuclei. However, this can also make it difficult to change molecular structure quickly. Indigo Instruments customer service was also very helpful in processing my order quickly and completing forms required by my institution for requisition.
Thanks for the feedback. It is an unusual set & the only one we know of that can build ferrocene.