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Separation and determination of metals as complexes of 1-nitroso-2-naphthol-6-sulphonic and 2-nitroso-1-naphthol-6-sulphonic acids

✍ Scribed by Sir�n, Heli ;Riekkola, Marja-Liisa

Publisher: Springer-Verlag
Year: 1986
Weight: 624 KB
Volume: 90
Category: Article
ISSN: 0344-838X
DOI: 10.1007/bf01364298

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## Abstract Condensation of the zinc salt, formed in nearly quantitative manner, with indoline bases (I) in the presence of cyclic amines affords the title compounds in moderate to good yields.