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# Name the molecule whose structure is not explained by VBT?

Last updated date: 26th Mar 2023
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Hint: In order to answer this question, to know the molecules whose structure are not explained by VBT, we will first name the molecule structure and then we will explain the VBT concept or working mechanism.

According to VBT theory, a metal atom or ion may use its $\left( {n - 1} \right)d,ns,np,or{\text{ }}ns,np$ , and orbitals for hybridization to yield a range of identical orbitals of definite geometry such as octahedral, tetrahedral, square planar, and so on when it is influenced by ligands. The ligand orbitals that can contribute electron sets for bonding are allowed to overlap with these hybrid orbitals.
Efficacy Chemical bonding plays a role in deciding the shapes of molecules, according to bond theory. It states that when two atoms' half-filled orbitals collide, the electrons pair up as a result of the collision. A covalent bond is formed as a result. The overlapping of orbitals determines the bond frequency. The stronger the bond, the greater the overlap. The two types of overlapping orbitals are discussed in VBT. When orbitals in the internuclear axis overlap, a sigma bond is formed. The formation of a pi bond occurs when two unhybridized $p-orbitals$ collide. A single covalent bond has one sigma bond, a double covalent bond has one sigma and one $\pi - bond$ , and a triple covalent bond has one sigma and two $\pi - bonds$ .