6-Membered Rings
Six-membered rings with a single heteroatom:
| Heteroatom | Saturated | Unsaturated |
|---|---|---|
| Nitrogen | Piperidine (Azinane is not used) | Pyridine (Azine is not used) |
| Oxygen | Oxane | Pyran (2H-Oxine is not used) |
| Sulfur | Thiane | Thiopyran (2H-Thiine is not used) |
| Silicon | Salinane | Siline |
| Germanium | Germinane | Germine |
| Tin | Stanninane | Stannine |
| Boron | Borinane | Borinine |
| Phosphorus | Phosphinane | Phosphinine |
| Arsenic | Arsinane | Arsinine |
With two heteroatoms:
| Heteroatom | Saturated | Unsaturated |
|---|---|---|
| Nitrogen / nitrogen | Piperazine | Diazines |
| Oxygen / nitrogen | Morpholine | Oxazine |
| Sulfur / nitrogen | Thiomorpholine | Thiazine |
| Oxygen / oxygen | Dioxane | Dioxine |
| Sulfur / sulfur | Dithiane | Dithiine |
With three heteroatoms:
| Heteroatom | Saturated | Unsaturated |
|---|---|---|
| Nitrogen | Triazine | |
| Oxygen | Trioxane |
With four heteroatoms:
| Heteroatom | Saturated | Unsaturated |
|---|---|---|
| Nitrogen | Tetrazine |
The hypothetical compound with six nitrogen heteroatoms would be hexazine.
Read more about this topic: Heterocyclic Compound
Famous quotes containing the word rings:
“‘She has got rings on every finger,
Round one of them she have got three.
She have gold enough around her middle
To buy Northumberland that belongs to thee.”
—Unknown. Young Beichan (l. 61–64)