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QuestionChemistry

"Determine the electron-domain geometry of CCl 4 ​ . Identify the electron-domain geometry of PCl 3 ​ . A. Tetrahedral B. Trigonal pyramidal C. Trigonal planar D. Linear"
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Answer

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

Step 2:
: Understand Electron-Domain Geometry

Electron-domain geometry describes the arrangement of electron domains (bonding and non-bonding) around the central atom in a molecule.

Step 3:
: Analyze CCl₄

For CCl₄: - Central atom is carbon (C) - Total electron domains = 4 (4 single bonds to chlorine atoms) - No lone pairs on the central carbon atom - Number of electron domains = 4 - Electron-domain geometry: Tetrahedral

Step 4:
: Analyze PCl₃

For PCl₃: - Central atom is phosphorus (P) - Total electron domains = 4 (3 single bonds to chlorine atoms + 1 lone pair) - 1 lone pair on the central phosphorus atom - Number of electron domains = 4 - Electron-domain geometry: Tetrahedral

Step 5:
: Select the Correct Answer

Based on the analysis: - CCl₄ has a tetrahedral electron-domain geometry - PCl₃ also has a tetrahedral electron-domain geometry

Final Answer

Tetrahedral Key Insights: - Electron-domain geometry depends on the total number of electron domains - Lone pairs count as electron domains - Tetrahedral geometry occurs when there are 4 electron domains around the central atom