Allene

Name:
Allene
Detailed information:

Chemistry name:	propadiene; dimethylenemethane
M Formula:	H2C:C:CH2
Properties:
Colorless gas. Unstable. Fp −136.5C, bp 34.5C. Can be readily liquefied.
Derivation:
(1) Action of zinc dust on 2,3-dichloropropene; (2) pyrolysis of isobutylene; (3) electrolysis of potassium itaconate.
Use:
Organic intermediate.