572-19-0

Basic information

• Product Name: 1,2-Diphenyl-1,2-bis[(Z)-2-phenylhydrazono]ethane
• Synonyms: (1Z,2Z)-1,2-Diphenylethane-1,2-dione bis[phenyl hydrazone];1,2-Diphenyl-1,2-bis[(Z)-2-phenylhydrazono]ethane;1,2-Diphenylethane-1,2-dione bis[(Z)-phenyl hydrazone];anti-Benzil osazone
• CAS NO: 572-19-0
• Molecular Formula: C₂₆H₂₂N₄
• Molecular Weight: 390.49
• Mol File: 572-19-0.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1,2-Diphenyl-1,2-bis[(Z)-2-phenylhydrazono]ethane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Diphenyl-1,2-bis[(Z)-2-phenylhydrazono]ethane(572-19-0)
• EPA Substance Registry System: 1,2-Diphenyl-1,2-bis[(Z)-2-phenylhydrazono]ethane(572-19-0)

Safety Data

• Hazardous Substances Data: 572-19-0(Hazardous Substances Data)

Upstream product

• 588-64-7 benzaldehyde phenylhydrazone 
• 1695-80-3 benzil bisphenylhydrazone 
• 60-29-7 diethyl ether 
• 7553-56-2 iodine 
• 141-52-6 sodium ethanolate 
• 110-46-3 isopentyl nitrite 
• 100-63-0 phenylhydrazine 
• 3775-15-3 3,4-diphenyl-1,2,5-thiadiazole-1,1-dioxide 

Downstream Products

• 572-18-9 (1E,2E)-1,2-diphenylethane-1,2-dione bis(phenylhydrazone) 
• 27653-10-7 2,4,5-triphenyl-2H-[1,2,3]triazole 
• 62-53-3 aniline 
• 7664-41-7 ammonia 
• 100-52-7 benzaldehyde 
• 134-81-6 benzil 

Relevant articles and documents

The true configuration of the benzilosazone isomers

The 1H NMR-based argument previously used to assign configurations to the three stereoisomers of benzilosazone is briefly reviewed. The configuration of the stable isomer is shown to be Z,Z by single crystal X-ray diffraction analysis, instead of E,E as previously reported. This assignment, together with physical measurements and spectroscopic (NMR and UV) data, allows the establishment of the configuration of all isomers. Computational methods are employed to clarify the relation between the configuration of the isomers and their 1H NMR, thus explaining the origin of the previous erroneous assignment.

Isomerisation of Benzilphenylosazones in the Presence of Acids

Isomerisation process of the three stereomeric benzilphenylosazones (Z,Z E,E and Z,E) in a melt of trichloracetic acid and in an ethylacetate solution of conc. sulfuric acid is studied.It is established that the convertion runs irreversibly to the stable E,E-isomer at low acid concentration.The process is reversible at high acid concentration and the equilibrium state depends on this concentration.