Hexacyanotriquinarenemethane dianion is obtained as a stable, highly teterapolar substance in one step by the reaction of 4-lithiophenyldicyanomethyllithium with ethyl chloroformate. The acidity of its conjugate acid was determined to be p<I>K</I><SUB>a</SUB>1 = <I>ca.</I> 2.5 and p<I>K</I><SUB>a</SUB>2 = 3.0.
- Chemistry letters
Chemistry letters 1997(10), 1057-1058, 1997-10
The Chemical Society of Japan