| 585 / | HD | CHEMISTRY OF HYDROCARBON COMPOUNDS |
| 500 | DF | UNSATURATED COMPOUND SYNTHESIS {14} |
| 502 | DF | .~ By addition of entire unsaturated molecules, e.g., polymerization, etc. {8} |
| 520 | DF | .~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc. {5} |
| 527 | DF | .~.~.~ N- or P-containing catalyst {2} |
| 528 | | .~.~.~.~ Metal phosphate |