MOLECULAR POLARITYFIELD NOTE 06 / 175
Is Acetamide (C2H5NO) polar or nonpolar?
Acetamide (C2H5NO) is polar because its carbonyl and amide groups create strongly unequal electron density.
Acetamide · trigonal planar at carbonyl C; tetrahedral at methyl C
The molecule in space
Drag to turn the molecule. Show angles to read the model geometry.
01 / MODEL RECORDPubChem 3D coordinates. Atom sizes and bond thickness are illustrative.How model data is used ↗
Why C2H5NO is polar
Acetamide has the connectivity CH3–C(=O)–NH2. The carbonyl C=O bond is strongly polar, while the nitrogen lone pair interacts with the adjacent carbonyl system. These two heteroatom regions are not balanced by the methyl group.
What to notice
The amide nitrogen is closer to planar than an isolated amine nitrogen because its lone pair can delocalize toward the carbonyl. The model is one conformer of that linked group.
Common questions about C2H5NO
- 01
What does the Lewis structure of C2H5NO show?
The neutral drawing is CH3–C(=O)–NH2. Oxygen has two lone pairs and nitrogen has one; the C–N bond has partial double-bond character through resonance.
- 02
What is the molecular geometry of C2H5NO?
C2H5NO has a trigonal planar at carbonyl C; tetrahedral at methyl C molecular geometry. The 3D model shows representative bond angles of 120.9° and 122.5° and 116.6°. These angles come from the displayed model coordinates.
- 03
What is the molar mass of C2H5NO?
C2H5NO has an approximate molar mass of 59.07 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.