?106 IECarbon forms an unusual unstable oxide of formula
Chapter , Problem 106IE(choose chapter or problem)
106 IE
Carbon forms an unusual unstable oxide of formula C3O2, called carbon suboxide. Carbon suboxide is made by using P2O5 to dehydrate the dicarboxylic acid called malonic acid, which has the formula HOOC—CH2—COOH. (a) Write a balanced reaction for the production of carbon suboxide from malonic acid. (b) How many grams of carbon suboxide could be made from 20.00 g of malonic acid? (c) Suggest a Lewis structure for C3O2. (Hint: The Lewis structure of malonic acid suggests which atoms are connected to which.) (d) By using the information in Table, predict the C—C and C—O bond lengths in C3O2.
Table Average Bond Lengths for Some Single, Double, and Triple Bonds
Bond |
Bond Length (Å) |
Bond |
Bond Length (Å) |
C—C |
1.54 |
N—N |
1.47 |
C=C |
1.34 |
N=N |
1.24 |
C≡C |
1.20 |
N≡N |
1.10 |
C—N |
1.43 |
N—O |
1.36 |
C=N |
1.38 |
N=O |
1.22 |
C≡N |
1.16 |
|
|
|
O—O |
1.48 |
|
C—O |
1.43 |
O=O |
1.21 |
C=O |
1.23 |
|
|
C≡O |
1.13 |
|
(e) Sketch the Lewis structure of a product that could result by the addition of 2 mol of H2 to 1 mol of C3O2.
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