MOLECULAR POLARITYFIELD NOTE 139 / 175
Is NH2CONH2 polar or nonpolar?
NH2CONH2 is polar because its carbonyl oxygen and two amide groups do not form equal opposite dipoles.
Urea · approximately planar at carbonyl C and both N centers
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 NH2CONH2 is polar
The central carbon is double-bonded to oxygen and bonded to two –NH2 groups. The nitrogen groups are equivalent, but neither is an oxygen atom opposite C=O, so the carbonyl contribution remains.
What to notice
Urea's two N ends are alike; the third direction around carbon is C=O. Local symmetry between nitrogens does not make the whole molecule nonpolar.
Common questions about NH2CONH2
- 01
What does the Lewis structure of NH2CONH2 show?
The connectivity is H2N–C(=O)–NH2. Oxygen has two lone pairs, and each nitrogen has a lone pair involved in resonance.
- 02
What is the molecular geometry of NH2CONH2?
NH2CONH2 has a approximately planar at carbonyl C and both N centers molecular geometry. The 3D model shows representative bond angles of 121.6° and 117.1° and 121.2°. These angles come from the displayed model coordinates.
- 03
What is the molar mass of NH2CONH2?
NH2CONH2 has an approximate molar mass of 60.06 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.