117506-46-4Relevant articles and documents
Syntheses with Nitriles, LXXX. Dicyanomethylenepyrazolinones and Their Chromophoric Properties
Junek, Hans,Klade, Manfred,Sterk, Heinz,Fabian, Walter
, p. 993 - 1010 (2007/10/02)
1-Phenyl-2-pyrazolin-5-ones 1a-e react with tetracyanoethylene forming the corresponding dicyanomethylenepyrazolin-5-ones 2a-e.The products are deeply coloured with absorption bands between 550 and 650 nm, but low ε-values and negative solvatochromic effe