MOLECULAR POLARITYFIELD NOTE 02 / 175
Is C2H4Br2 polar or nonpolar?
1,2-Dibromoethane (C2H4Br2) is polar because its bromine-substituted ends have C–Br dipoles that vary with rotation.
1,2-Dibromoethane · tetrahedral at both C; flexible chain
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 C2H4Br2 is polar
The C–C bond of 1,2-dibromoethane rotates, giving conformers with different C–Br alignments. The molecular dipole is therefore conformation dependent rather than fixed by one flat structural formula.
What to notice
The anti conformer can have strong cancellation, while other conformers do not; a single 3D model is one conformer, not every shape in solution.
Common questions about C2H4Br2
- 01
What does the Lewis structure of C2H4Br2 show?
The structure is Br–CH2–CH2–Br, with single bonds throughout. Each bromine has three lone pairs.
- 02
What is the molecular geometry of C2H4Br2?
C2H4Br2 has a tetrahedral at both C; flexible chain molecular geometry. The 3D model shows representative bond angles of 109.5° and 106.7° and 112.4°. These angles come from the displayed model coordinates.
- 03
What is the molar mass of C2H4Br2?
C2H4Br2 has an approximate molar mass of 187.86 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.