| 摘要 |
1288554 1,1<SP>1</SP> - Ethylene - 2,21 - bipyridylium salts IMPERIAL CHEMICAL INDUSTRIES Ltd 25 Sept 1969 [4 Oct 1968] 47224/68 Heading C2C 1,1<SP>1</SP> - Ethylene - 2,21 - bipyridylium salts are produced by heating 2,2<SP>1</SP>-bipyridyl, optionally substituted by alkyl groups, with ethylene glycol and an acid. Suitable acids are, for example, hydrogen halides and sulphuric, phosphoric and boric acids. Examples are given of the preparation of 1, 1<SP>1</SP>.ethylene.2,2<SP>1</SP>.bipyridylium bis-bisulphate, phosphate, dibromide, dichloride, sulphate, phosphate and borate. |
