| 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} |
| 521 | DF | .~.~.~ Hydride or organic compound or complex containing alkaline-, B-, or Zn group material {2} |
| 523 | DF | .~.~.~.~ Transition metal-containing {1} |
| 524 | | .~.~.~.~.~ Ti |