The column was packed with 12 g of alumina. A 50:50 mixture of ferrocene and acetylferrocene was weighed on the electronic balance (total mass = 0.102 g, or 102 mg), and placed at the top of the column. Elution was first with hexane, which caused a yellow band to move down the white alumina. After the yellow fraction was collected, the eluent was replaced by TBME, which was passed through the column until the red fraction was collected. The two colored solutions were heated in a 70 °C water bath until the solvents were evaporated and colored solids were obtained. Percent recoveries for each compound were calculated, and melting points were taken. Data for the first, fastest-moving fraction: 0.045 g yellow solid, mp = 170-171 °C. Data for the second, slowest-moving fraction: 0.054 g orange solid, mp= 75-80 °C.

The column was packed with 12 g of alumina. A 50:50 mixture of ferrocene and acetylferrocene was weighed on the electronic balance (total mass = 0.102 g, or 102 mg), and placed at the top of the column. Elution was first with hexane, which caused a yellow band to move down the white alumina. After the yellow fraction was collected, the eluent was replaced by TBME, which was passed through the column until the red fraction was collected. The two colored solutions were heated in a 70 °C water bath until the solvents were evaporated and colored solids were obtained. Percent recoveries for each compound were calculated, and melting points were taken. Data for the first, fastest-moving fraction: 0.045 g yellow solid, mp = 170-171 °C. Data for the second, slowest-moving fraction: 0.054 g orange solid, mp= 75-80 °C.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter33: Automated Methods Of Analysis

Section: Chapter Questions

Problem 33.8QAP

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