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QuestionChemistry

What is the molecular geometry around nitrogen in CH^3NH^2?
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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:
: Identify the Lewis Structure

- In CH₃NH₂ (methylamine), nitrogen is the central atom - Nitrogen has 5 valence electrons - Hydrogen atoms contribute 1 electron each - Carbon contributes 4 electrons

Step 3:
: Determine Electron Geometry

N_{electron \space domains} = 4
- Count total electron domains around nitrogen - These include:

Step 4:

One N-C single bond

Step 5:

One N-H single bond

Step 6:

One lone pair of electrons

Step 7:

One N-H single bond

Step 8:
: Apply VSEPR Theory

- Total electron domains: 4 - Lone pair present: 1 - Electron geometry: Tetrahedral - Lone pair reduces bonding geometry

Step 9:
: Determine Molecular Geometry

- With one lone pair in a tetrahedral arrangement - Molecular geometry is pyramidal (trigonal pyramidal)

Final Answer

The molecular geometry around nitrogen in CH₃NH₂ is trigonal pyramidal.