CXVII.—Colour and constitution of azo-compounds. Part I

John Theodore Hewitt, Herbert Victor Mitchell
1907 Journal of the Chemical Society Transactions  
IN two papers brought before tbe Society rather more.tha,n a year ago (Trans., 1906, 89, 13, 17) attention was drawn to the remarkable change of colour observed when p-nitrobenzeneazo-4 : 6-dimethylcoumarin and p-nitrobenzeneazo-4-methyl-a-naphthacoumarin were dissolved in alkali. Both substances are reddish-brown in colour and they dissolve in neutral solvents with a similar shade; the former gives,
doi:10.1039/ct9079101251 fatcat:tlf3mxoe4ra3hm6h45xt2zofla