Question

Following are several Lewis structures showing all valence electrons. Assign formal charges in each structure as appropriate. (a) CC(C)=O (b) C=C([O-])CN (c) CC=O (d) C=C(C)C(=O)O (c) CCC (f) CO

Short answer

Question: Draw the Lewis structure for each molecule represented in the SMILES notation, and assign appropriate formal charges to each atom in each structure. (a) CC(C)=O Lewis structure: ``` H | H--C--C==O | H ``` Formal charges: All atoms have a formal charge of 0. (b) C=C([O-])CN Lewis structure: ``` H H | | H--C==C--O¯--C--N | H H ``` Formal charges: C (0), C (0), O (-1), C (0), N (0) (c) CC=O Lewis structure: ``` H | H -- C -- C == O ``` Formal charges: All atoms have a formal charge of 0. (d) C=C(C)C(=O)O Lewis structure: ``` H | H -- C == C -- C == O | | H O - H | H ``` Formal charges: All atoms have a formal charge of 0. (e) CCC Lewis structure: ``` H -- C -- C -- C | | | H H H ``` Formal charges: All atoms have a formal charge of 0. (f) CO Lewis structure: ``` H | H--C==O ``` Formal charges: All atoms have a formal charge of 0.

Step-by-step solution

Drawing the Lewis structure

The Lewis structure for CC(C)=O is: ``` H | H--C--C==O | H ```

Assigning formal charges

The formal charges for each atom in this molecule are 0, as all atoms follow the octet rule and no charge is indicated. (b) C=C([O-])CN

Drawing the Lewis structure

The Lewis structure for C=C([O-])CN is: ``` H H | | H--C==C--O¯--C--N | H H ```

Assigning formal charges

The formal charges for each atom are: - C: 0 - C: 0 - O: -1 (as it has an extra electron) - C: 0 - N: 0 (c) CC=O

Drawing the Lewis structure

The Lewis structure for CC=O is: ``` H | H -- C -- C == O ```

Assigning formal charges

The formal charges for each atom in this molecule are 0, as all atoms follow the octet rule and no charge is indicated. (d) C=C(C)C(=O)O

Drawing the Lewis structure

The Lewis structure for C=C(C)C(=O)O is: ``` H | H -- C == C -- C == O | | H O - H | H ```

Assigning formal charges

The formal charges for each atom in this molecule are 0, as all atoms follow the octet rule and no charge is indicated. (e) CCC

Drawing the Lewis structure

The Lewis structure for CCC is: ``` H -- C -- C -- C | | | H H H ```

Assigning formal charges

The formal charges for each atom in this molecule are 0, as all atoms follow the octet rule and no charge is indicated. (f) CO

Drawing the Lewis structure

The Lewis structure for CO is: ``` H | H--C==O ```

Assigning formal charges

The formal charges for each atom in this molecule are 0, as all atoms follow the octet rule and no charge is indicated.