Finding unknown compounds
Not what you're looking for?
11. A low-melting solid A was isolated, which combustion analysis showed had composition C9H10O. The substance gave a precipitate when treated with 2,4-dinitrophenylhydrazine solution. Furthermore, when reacted with iodoform reagent, a yellow precipitate of CHI3 was observed. Acidification of the alkaline solution from the iodoform test produced a solid material, B. Reduction of Compound A with LiAlH4 gave Compound C (C9H12O). This material, C, also gave Compound B when treated with iodoform reagent. Vigorous oxidation of A, B, or C with sodium dichromate-sulfuric acid solution gave an acid having a mp = 121-122 degrees C. Your friend needs your assistance in determining the structures for Compounds A, B, and C. Can you identify the three compounds?
12. An organic compound (C9H10O) showed strong absorption in the IR spectrum at 1735/cm and gave a semicarbazone having a melting point of 198 degrees C. it burned with a yellow, sooty flame and also gave a positive iodoform test. The 1H NMR spectrum of the compound provided the following information:
2.11 ppm 3H (singlet)
3.65 ppm 2H (singlet)
7.20 ppm 5H (complex multiplet)
Identify the unknown organic compound.
Purchase this Solution
Solution Summary
This solution answers two chemistry questions, identifying three unknown compounds based on information provided such as acidification of alkaline solution, the vigorous oxidation, results of and iodoform test and how they burn.
Purchase this Solution
Free BrainMass Quizzes
General Chemistry - Classification of Matter
This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.
Match Elements with their Symbols
Elements are provided: choose the matching one- or two-letter symbol for each element.
Organic Chemistry Naming: Alkanes
This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.
Thermochemistry
The quiz helps in revising basic concepts about thermochemistry.