Stirring 2-methyl-2-butene with catalytic acid in methanol (solvent) gave the et

Question

Stirring 2-methyl-2-butene with catalytic acid in methanol (solvent) gave the ether shown(2 - methoxy-2-methylbutane or tert-amyl methyl ether). Beginning with 2.31 mL of alkene, 1.47 g of product was obtained. Calculate the percent yield. Consult one of the chemical catalogs for this question. Report which catalog you used. There may be some variation on some of the answers. You may need to look at the sample entry in the front of the catalog to interpret the entries. What is the CAS number for acetic acid? What is the density and the index of refraction? What is the CAS number for acetic acid-d_4 i.e. teteradeuteroacetic acid (CD_3 CO_2 D)? What is its density? What is the CAS number for 1-^13 C-labelled acetic acid, i.e. (CH_3^13 CO_2 G)?

Explanation / Answer

4. moles of 2-methyl-2-butene = 2.31 ml x 0.662 g/ml/70.133 g/mol = 0.022 mols

1 mole of alkene forms 1 mole of product

Theoretical mass of product formed = 0.022 mol x 102.173 g/mol = 2.25 g

Actual yield of product = 1.47 g

Percent yield = 1.47 x 100/2.25 = 65.33%

5. CAS for acetic acid = 64-19-7

Density of acetic acid = 1.049 g/ml

index of refraction for acetic acid = 1.371

CAS for acetic acid-d4 = 1186-52-3

Density for acetic acid-d4 = 1.119 g/ml

CAS for 1- 13C labelled acetic acid = 1563-79-7

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