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Seesaw Molecular Geometry - The seesaw shape maximises the bond angles of the single lone pair and the other atoms in the molecule. An example of a seesaw shaped molecule is sulphur tetrafluoride, or SF4.
Disphenoidal or seesaw (also known as sawhorse [1]) is a type of molecular geometry where there are four bonds to a central atom with overall C 2v molecular symmetry. The name "seesaw" comes from the observation that it looks like a playground seesaw.
Recognizing similarities to simpler molecules will help you predict the molecular geometries of more complex molecules. Example \(\PageIndex{3}\) Use the VSEPR model to predict the molecular geometry of propyne (H 3 C–C≡CH), a gas with some anesthetic properties.
Two regions of electron density around a central atom in a molecule form a linear geometry; three regions form a trigonal planar geometry; four regions form a tetrahedral geometry; five regions form a trigonal bipyramidal geometry; and six regions form an octahedral geometry.
In this video we’ll look at the Seesaw Molecular Geometry and Bond Angles. We'll use the example of SF4 to understand the molecular shape.
Seesaw molecular geometry has one lone pair and four bonds surrounding the central atom. One lone pair is responsible for the seesaw shape of molecules which got its name from its resemblance to the seesaw in the playground. The seesaw shape forms a bond angle of less than 90 to 120 degrees.
Quick Facts Examples, Point group ... Close. The seesaw geometry occurs when a molecule has a steric number of 5, with the central atom being bonded to 4 other atoms and 1 lone pair (AX 4 E 1 in AXE notation).
