Li 2 + and Li 2 – ions have the same bond order ( 0.5).īut Li 2 – has more electrons in higher energy antibonding molecular orbital as compared to Li 2 +. Li 2 + is more stable as compared to Li 2 – : Thus lithium molecule (Li2) is more stable. In combination with the final structure coordinates, you can draw a 3-D diagram with bonds drawn to link the atoms that the bonding table shows as having a bond. Therefore, Li2 has stronger single covalent bonding. Since the bond order of Li 2 is higher than Li 2 + and Li 2. The antibonding molecular orbital σ*2 s contains 1 electron.īond order = Number of electrons in BMO – Number ofīond order = 0.5 Arrange the following species in increasing order of stability: Li 2, Li2 +, Li 2 – Chemistry Class important question MO diagram Stability order of Li2,Li2-,Li2+ Based on general diagram for molecular orbital of second row of O 2 molecule, the 2p MO is below the 2p molecular orbitals. As two H nuclei move toward each other, the 1 s atomic orbitals of the isolated atoms gradually merge into a new molecular orbital in which the greatest electron density falls between the two nuclei. In the case of Li 2 -, the 2 electrons are present in σ 2s orbitals. This is the hydrogen molecule ion, which consists of two nuclei of charge +1, and a single electron shared between them. This also causes a large jump in energy in the 2p. Notice how the from the 2p behaves more non-bonding like due to mixing, same with the 2s. This is the reasoning for the rearrangement from a more familiar diagram. The bond order of the boron cation is also calculated and the mea. With nitrogen, we see the two molecular orbitals mixing and the energy repulsion. In the case of Li 2 +, the 1 electrons are present in σ 2s orbitals.īond order = Number of electrons in BMO – Number of electrons in ABMO / 2 This video discusses how to draw the molecular orbital (MO) diagram for the B2(+) molecule. How to draw the molecular orbital diagram of Li 2, Li2 +, Li2 – ? MO diagram MO diagram of Li2 ,Li2+ ,Li2. the atomic orbitals have similar energies. the atoms have an equal number of valence electrons. electrons in the orbitals have the same spin. A dihydrogen molecule, H 2, readily forms, because the energy of a H 2 molecule is lower than that of two H atoms. Atomic orbitals combine most effectively to form molecular orbitals when. The electronic configuration of the molecule is (1s2) (1s0). When the atomic orbitals of the two atoms combine, the electrons occupy the molecular orbital of lowest energy, the 1s bonding orbital. The antibonding molecular orbital σ*2 s is empty.īond order = Number of electrons in BMO – Number of electrons in ABMO /2īond order 1 shows that there is a single covalent bond between the lithium atoms in the Li 2 molecule. A dihydrogen molecule (H 2) forms from two hydrogen atoms. The 2 electrons are present in σ 2s orbitals. How do draw the Molecular Orbital Diagram of Lithium molecule (Li 2)?Īccording to the molecular orbital theory, the molecular orbital diagram of the lithium molecule is shown below: MO diagram Li2 bond order The electronic configuration of the Li atom is 1s 2 2s 1. The distribution of electrons in lithium electronic shells is as follows: The atomic number of Lithium (Li ) is 3 and the mass number is 6.941. Lithium is represented by the symbol “Li”. Lithium belongs to group 1 ( alkali metals), period 2 s-block element of the periodic table. \).How to draw Molecular Orbital Diagram of Li
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