MOLECULAR POLARITYFIELD NOTE 120 / 175
Is HCONH2 polar or nonpolar?
HCONH2 is polar because the carbonyl and amide groups create a strong unequal charge distribution.
Formamide · approximately planar around C and N
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 HCONH2 is polar
The C=O bond draws electron density toward oxygen, while the nitrogen lone pair interacts with the carbonyl system. The H on carbon and the two N–H bonds do not create an equal opposing end.
What to notice
Amide resonance makes the C–N bond less like a freely rotating simple single bond. A local Lewis sketch is useful but does not capture all electron delocalization.
Common questions about HCONH2
- 01
What does the Lewis structure of HCONH2 show?
The main connectivity is H–C(=O)–NH2. Oxygen has two lone pairs; nitrogen's lone pair participates in amide resonance.
- 02
What is the molecular geometry of HCONH2?
HCONH2 has a approximately planar around C and N molecular geometry. The 3D model shows representative bond angles of 121.3° and 117° and 126.3°. These angles come from the displayed model coordinates.
- 03
What is the molar mass of HCONH2?
HCONH2 has an approximate molar mass of 45.04 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.