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QuestionChemistry

Draw the Lewis structure for COCl₂, including lone pairs. What is the molecular shape of COCl₂? Is the C-Cl bond in COCl₂ polar or nonpolar? What is the Cl-C-Cl bond angle? Is the molecule COCl₂ polar or nonpolar?
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Answer

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Step 1:
I'll solve this problem step by step, following the specified LaTeX formatting guidelines:

Step 2:
: Determine the total number of valence electrons

Total valence electrons: $$4 + 6 + (7 \times 2) = 24$$ electrons
- Carbon (C): 4 valence electrons - Oxygen (O): 6 valence electrons - Chlorine (Cl): 7 valence electrons (×2)

Step 3:
: Arrange atoms and draw initial skeleton structure

- Place carbon in the center - Attach oxygen with a double bond - Attach two chlorine atoms to carbon

Step 4:
: Lewis Structure Placement

- Central carbon double-bonded to oxygen - Single bonds to two chlorine atoms - Distribute remaining electrons as lone pairs Lewis Structure: \begin{array}{c} \ddot{Cl} \ \quad \downarrow \ O=C-Cl \ \quad \uparrow \ \ddot{Cl} \end{array}

Step 5:
: Molecular Geometry

- Central carbon has three electron domains - Electron domain geometry: Trigonal planar - Molecular shape: Trigonal planar

Step 6:
: Bond Polarity

- C-Cl bonds: Polar (electronegativity difference) - C=O bond: Polar

Step 7:
: Bond Angle

- Cl-C-Cl bond angle: $$120^\circ

Final Answer

1. Lewis Structure: Shown in Step 3 2. Molecular Shape: Trigonal planar 3. C-Cl Bond: Polar 4. Cl-C-Cl Bond Angle: 120^\circ 5. Molecule Polarity: Polar (due to asymmetric distribution of electronegative atoms)