A visual notebook for molecular polarity.
IsPolar answers one question per molecule: polar or nonpolar? The answer appears first, followed by the shape and bond reasoning that makes it useful.
How the answers are made
We consider bond polarity and the three-dimensional arrangement of the atoms. Equal bond dipoles can cancel in a symmetric molecule; a different atom, a lone pair or a different shape can leave a net dipole. VSEPR is a starting point for predicting shape, not a replacement for experimental evidence.
Read the VSEPR guide ↗What the 3D models show
Atom coordinates come from PubChem 3D conformers when available. Selected geometries and angle claims are checked against NIST data. When neither provides a suitable model, the page uses an illustrative geometry and labels it as such. Atom sizes and bond thickness are chosen for readability; they are not measured atomic radii.
Model bond angles are calculated from the displayed coordinates. An angle shown for an illustrative model describes that drawing, not a new experimental measurement.
Lewis notes describe bonds and lone pairs using common classroom drawings. Where resonance, radicals, or electron-deficient centers matter, the note calls out the limits of a single sketch.
Molar masses are calculated from the formula using the CIAAW 2024 abridged standard atomic weights and rounded to two decimal places.
Questions or corrections?
If a molecule’s explanation or model needs attention, please tell us which page you were reading and what looked wrong.
info@ispolar.app ↗