Here are the essential concepts you must grasp in order to answer the question correctly.
Isoelectronic Species
Isoelectronic species are atoms, ions, or molecules that have the same number of electrons and, therefore, the same electronic structure. In this case, carbon monoxide (CO) and nitrogen gas (N2) both have 14 electrons, making them isoelectronic. Understanding this concept helps in predicting similarities in bonding and molecular orbital characteristics between different species.
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Molecular Orbitals (MOs)
Molecular orbitals are formed by the linear combination of atomic orbitals (LCAO) when atoms bond together. In CO, the p2p molecular orbitals are derived from the p orbitals of carbon and oxygen. The contributions of each atom's atomic orbitals to the molecular orbitals can vary based on their electronegativity and atomic size, influencing the overall bonding characteristics.
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Electronegativity and Atomic Size
Electronegativity is a measure of an atom's ability to attract and hold onto electrons, while atomic size refers to the distance from the nucleus to the outermost electrons. In CO, oxygen is more electronegative than carbon, which means that the p2p molecular orbitals will have a greater contribution from the oxygen atom. This difference affects the distribution of electron density and the overall stability of the molecule.
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