MOLECULAR POLARITYFIELD NOTE 131 / 175
Is Methanethiol (CH4S) polar or nonpolar?
Methanethiol (CH4S) is polar because its C–S–H end is bent and differs from the methyl end.
Methanethiol · tetrahedral at C; bent at S
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 CH4S is polar
Methanethiol is CH3–S–H. Sulfur forms two single bonds and has two lone pairs, leaving a bent C–S–H region. Its bonds and charge distribution are unlike the three C–H directions around carbon, so the molecule is polar.
What to notice
Replacing methanol's oxygen with sulfur changes bond strengths, but the methyl group and bent X–H end still make an asymmetric molecule.
Common questions about CH4S
- 01
What does the Lewis structure of CH4S show?
The structure is CH3–S–H. Sulfur has two single bonds and two lone pairs; carbon has three C–H bonds and one C–S bond.
- 02
What is the molecular geometry of CH4S?
CH4S has a tetrahedral at C; bent at S molecular geometry. The 3D model shows representative bond angles of 96.6° and 109.9° and 109°. These angles come from the displayed model coordinates.
- 03
What is the molar mass of CH4S?
CH4S has an approximate molar mass of 48.10 g/mol, calculated from its formula using abridged standard atomic weights. Natural isotope variation can change the last digits.