CH2Cl2, commonly known as dichloromethane or methane dichloride, has a tetrahedral shape.
The molecule consists of one carbon atom bonded to two hydrogen atoms and two chlorine atoms. Although it has four regions of electron density around the central carbon atom, the presence of different atoms (hydrogen and chlorine) results in the molecule not being perfectly symmetrical.
Using the VSEPR (Valence Shell Electron Pair Repulsion) theory, we can determine that the arrangement of these bonds will have a tetrahedral geometry, but due to the different electronegativities and sizes of the atoms, the actual shape has some distortion. The bond angles in CH2Cl2 are slightly less than the ideal tetrahedral angle of 109.5 degrees. This means the molecule is not planar and has a three-dimensional structure that places the chlorine atoms further apart due to their larger size and higher electron repulsion compared to hydrogen atoms.
Overall, CH2Cl2 exhibits a tetrahedral geometry, though its shape is influenced by the nature of its constituent atoms.