216655-41-3

Upstream product

• 90-47-1 xanth-9-one 
• 90-94-8 bis(p-dimethylaminophenyl)methanone 
• 16291-32-0 biphenyl-2,2'-diyl-bis-lithium 
• 2236-52-4 2,2'-diiodobiphenyl 
• 90-96-0 bis(p-methoxyphenyl)methanone 

Downstream Products

• 216655-36-6 spiro[10,10-bis(4-dimethylaminophenyl)-9,10-dihydrophenanthrene-9,9'-[9H]xanthene] 

Relevant academic research and scientific papers

Preparation and Molecular Structures of 9,10-Dihydrophenanthrenes: Substituent Effects on the Long Bond Length

9,10-Dihydrophenanthrene derivatives 1-3 with electron-donating and/or -accepting groups at their 9,10-positions were prepared, and their precise molecular structures were determined by X-ray analyses at 203 K. The long C9-C10 bond [1.646(4) A] in the hexaarylethane-type compound 1 with four electron-donating groups is mainly caused by steric interaction. Push-pull type substitution does not induce the elongation of the central bond in the present system; the corresponding distance in 9,9-bis(4-dimethylaminophenyl)-10,10-dicyano derivative 2 [1.599(4) A] is intermediate between those of 1 and the tetracyano compound 3 [1.587(2) A].

A new type of tricolor electrochromic system based on the dynamic redox properties of hexaarylethane derivatives

Electrochemical interconversion between 9,9,10,10-tetra-aryldihydrophenanthrene 1 and 2,2′-bis(triarylmethylium) 22+ has been proven to proceed via open form cation radical 2+ as a stable intermediate; using these three species, a no