“…More recently, a complexes of m-DNB with ketones of a general formula CH3COCH2R (R = Me, Et, n-Pr, i-Bu, n-Bu) were described,174 as well as TNB a complexes with MeCO(CH2)2COMe,166 MeCOPr-i,166 Et2CO,166,175 (PhCH2)2CO,175 cyclopentanone,175 cyclohexanone,175 and (CO)3MnC5H4CH2COCH3. 176 Methyl ethyl ketone and acetylacetone yielded two isomeric a complexes due to the possible deprotonation of the methyl as well as the methylene group in these compounds. 166 In alkaline media aldehydes react with m-DNB and TNB to give a complexes formed by addition of the alcoholate of the aldol of the corresponding aldehyde to the nitro aromatic substrate.…”