compound 1 1 methanol benzine compound 2 1 ethyl benzine compound 3 methyl aceta
ID: 1006344 • Letter: C
Question
compound 1 1 methanol benzine
compound 2 1 ethyl benzine
compound 3 methyl acetate
compound 4 benezine with double bond on second and third carbon inside ( dont know the name)
compound 5 2 benzine
compound 6 1 chloro benzine
xompound 7 benzoic acid
compound 8 ethyl amine benezine
1 what general conclusion can you draw about heteroatoms such as N,O and Cl and polarity ?
2 which compound in each pair do you expect to elute first out of a column with a polar stationary phase ?
3 which compound in each pair do you expect to have higher Rf value on a TLC plate ?
draw a diagram that models what happens to compounds 1 and 2 as they travel down a column with a silica gel stationary phase hexane mobile phase methanil mobile phase include drawing of the compound at the begaining middle and end of the elution process
Explanation / Answer
1. Chlorine is least polar and oxygen is most polar.
2. From your question 'pair' is not clear but according to these compounds, polarity order is-
Compound 7 > Compound 1 > Compound 8 > Compound 6 > Compound 3 > Compound 2 > Compound 5 > Compound 4
Comound 2, 4, 5 and 6 will have almost same polarity. Most polar compound will elute at last and least one will elute first.
3. Least polar compound will have higher Rf value on a TLC plate.
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