{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Organic Lab Reactions 254

Organic Lab Reactions 254 - 3-NITROBIPHEN'YL249If the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
3-NITROBIPHEN'YL 249 If the passage of nitrous fumes is continued after the dark green solution stage, the yield is reduced considerably and the product is tarry. Unfor- tunately, there is no simple way of determining exactly when nitrosation is complete. The nitrosoacetylamine is precipitated when the solution is poured into a large volume of ice water. If the product is an oil, it is dis- solved in the aromatic liquid (Component B), and the solution is washed rapidly with water and then kept over a drying agent; if the nitroso- acetylamine is solid, it may be filtered and dried on a porous plate. Most of the solid nitrosoacetylarylamines can be kept at room tempera- ture for over a day without appreciable decomposition. A considerable number of acylarylamines, among them o-chloroacet- anilide, 2,6-dichloro-4-nitroacetanilide, and l-acetamido-2-methylan- thraquinone, form abnormal nitroso compounds with nitrous fumes; others, such as 4-dimethylamino-4'-acetamidoazobenzene, benzene-p-
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online