Gravimetric determination of thorium using some carboxylic acids
โ Scribed by Ch.Bheemasankaka Rao; P. Umapathi; V. Venkateswarlu
- Publisher
- Elsevier Science
- Year
- 1961
- Tongue
- English
- Weight
- 61 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0003-2670
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๐ SIMILAR VOLUMES
In stutlying tile effects of irrXIiiLti0n 011 solid oxalic ;lciCl xnC1 nlnnlnniutn o.xalatc, it \V;IS ncccssar-y to clctorn~inc very snix11 ;tnlounts of glycollic acid, glyoxdic itcicl, fc.~rn~~tlclcl~yClc and glyOSill in tile prescncc of similar concentrations of tnrtaric
## Abstract Aminocoumarin derivatives **3โ10** were condensed with diethyl ethoxymethylenemalonate to give intermediates **11โ18.** Thermal cyclizations of intermediates give benzopyranopyridinecarboxylates **19โ26.** These esters were hydrolyzed to the corresponding benzopyranopyridine carboxylic