MOLECULAR POLARITYFIELD NOTE 38 / 175
Is C4H4O polar or nonpolar?
Furan (C4H4O) is polar because an oxygen atom occupies one vertex of the ring and breaks all-carbon symmetry.
Furan · planar five-membered aromatic ring
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 C4H4O is polar
Furan is a five-membered aromatic ring with four CH positions and one oxygen. The oxygen-bearing side differs from the hydrocarbon side, giving the ring a net dipole.
What to notice
One oxygen lone pair participates in aromatic delocalization while the other is in the ring plane; the simple ring sketch does not show all electron behavior.
Common questions about C4H4O
- 01
What does the Lewis structure of C4H4O show?
The ring is O–CH=CH–CH=CH– in a closed cycle. Oxygen has two lone pairs, with one contributing to aromaticity.
- 02
What is the molecular geometry of C4H4O?
C4H4O has a planar five-membered aromatic ring molecular geometry. The 3D model shows representative bond angles of 106.6° and 106.1° and 127.6°. These angles come from the displayed model coordinates.
- 03
What is the molar mass of C4H4O?
C4H4O has an approximate molar mass of 68.07 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.