17825-40-0

Basic information

• Product Name: 3,4,5,6-tetramethylphenanthrene-9,10-dione
• CAS NO: 17825-40-0
• Molecular Formula: C₁₈H₁₆O₂
• Molecular Weight: 264.3184
• Mol File: 17825-40-0.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 465.8°C at 760 mmHg
• Flash Point: 201.3°C
• Density: 1.179g/cm³
• Vapor Pressure: 7.45E-09mmHg at 25°C
• Refractive Index: 1.612
• CAS DataBase Reference: 3,4,5,6-tetramethylphenanthrene-9,10-dione(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4,5,6-tetramethylphenanthrene-9,10-dione(17825-40-0)
• EPA Substance Registry System: 3,4,5,6-tetramethylphenanthrene-9,10-dione(17825-40-0)

Safety Data

• Hazardous Substances Data: 17825-40-0(Hazardous Substances Data)

Upstream product

• 7343-07-9 (+/-)-5,5',6,6'-tetramethyldiphenic acid 
• 138488-69-4 Dimethyl 5,5',6,6'-tetramethyldiphenate 

Relevant articles and documents

Syntheses, Enrichment of Enantiomers, and Barriers to Racemization of Twisted 9,10-Phenanthrenquinones

The known syntheses of the 9,10-phenanthrenequinones 10a-c were improved by the chlorotrimethylsilane modification of the acyloin condensation of biaryl diesters.The novel quinones 4a, 4b, and 12 were prepared.For the first time, enantiomers (M and P) of this class of compounds were enriched semipreparatively by liquid chromatography on optically active sorbents.The barriers to thermal racemization amount to 90-130 kJ mol-1 (Table 2) and are thus higher than the barriers for the corresponding phenanthrene hydrocarbons by roughly 20 kJ mol -1.The reasons for this increase are discussed in terms of repulsive interactions in the trans ition state of helix inversion.