Molecular Formula | C14H10Cl2N2 |
Molar Mass | 277.15 |
Physical and Chemical Properties | Bis (2-chlorobenzylidene) hydrazine is a slightly yellow amorphous powder, pure product m.p.141.5 ~ 142.5 ℃, easily soluble in hot dichloroethane and acetone, slightly soluble in ethanol, almost insoluble in water. |
Use | bis (2-chlorobenzylidene) hydrazine is an intermediate for the production of the acaricide tetrarazine. |
production method | bis (2-chlorobenzylidene) hydrazine is prepared from O-chlorobenzaldehyde and hydrazine hydrate as raw materials. 46L of O-chlorobenzaldehyde and 30L of 95% ethanol were placed in a 500L reactor, and stirring was started. 13 L hydrazine hydrate diluted with 170 L dilute ethanol was added dropwise at 20-30 ℃, and the mixture was kept for 3h after the addition was completed. After completion of the reaction, the material was put into a centrifuge for filtration, and the filter cake was washed with a small amount of water and sent to a rake dryer for drying to obtain a finished product. |