Yes, SF4 (Sulfur Tetrafluoride) is a polar molecule. The polarity of SF4 arises due to its molecular geometry and the difference in electronegativity between sulfur and fluorine atoms.
SF4 has a seesaw molecular geometry, which means it has one lone pair of electrons on the sulfur atom and four bonding pairs with fluorine atoms. This arrangement creates an asymmetrical distribution of electron density, leading to a net dipole moment. The lone pair on sulfur causes the molecule to be distorted, making it polar.
Fluorine is more electronegative than sulfur, so the bonds between sulfur and fluorine are polar. The vector sum of these bond dipoles does not cancel out due to the asymmetrical shape, resulting in a polar molecule.
In summary, SF4 is polar because of its asymmetrical shape and the presence of polar bonds that do not cancel each other out.