The photometric determination of boron with morin (3 : 5 : 7 : 3' : 4' penta-hydroxy-flavone)
✍ Scribed by A. Jewsbury; G.H. Osborn
- Publisher
- Elsevier Science
- Year
- 1949
- Tongue
- English
- Weight
- 473 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
From the above graph it will be seen that readings can be made over the whole range between IO and 200 pg. After 200 pg, however, the graph flattens out and is, therefore, of little USC for sensitive work. For practical purposes in order to I~eJc~orccs p. 4Ss'.
📜 SIMILAR VOLUMES
Single-crystal X-ray study T = 295 K Mean '(C±C) = 0.003 A Ê Disorder in solvent or counterion R factor = 0.047 wR factor = 0.137 Data-to-parameter ratio = 14.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The title hept-I -enitol( 2) reacted with aldehyde methyl(or phenyl)hydrazones in refluxing methanol or butyl acetate to give I-methyl(or phenyl)-5-(penta-O-acetyl-~-~~u~u~f~~-pentitol-l-yl)pyrazoles in good (for I-methylpyrazoles) or moderate yields (for I-phenylpyrazolcs). The 0-deacetylated produ