Using the molecular orbital energy ordering for second-row homonuclear diatomic molecules in which the π_2p orbitals lie at lower energy than the σ_2p, draw MO energy diagrams and predict the bond order in a molecule or ion with each number of total valence electrons. Will the molecule or ion be diamagnetic or paramagnetic? c. 8

검증된 단계별 안내

Identify the second-row homonuclear diatomic molecule with 8 valence electrons. This could be a molecule like \( \text{C}_2 \).

Draw the molecular orbital (MO) energy diagram for the molecule. For second-row diatomic molecules, the order of orbitals is: \( \sigma_{1s} \), \( \sigma^*_{1s} \), \( \sigma_{2s} \), \( \sigma^*_{2s} \), \( \pi_{2p} \), \( \sigma_{2p} \), \( \pi^*_{2p} \), \( \sigma^*_{2p} \).

Fill the molecular orbitals with the 8 valence electrons, starting from the lowest energy orbital. Each orbital can hold a maximum of 2 electrons with opposite spins.

Calculate the bond order using the formula: \( \text{Bond Order} = \frac{(\text{Number of electrons in bonding orbitals} - \text{Number of electrons in antibonding orbitals})}{2} \).

Determine if the molecule is diamagnetic or paramagnetic. If all electrons are paired, it is diamagnetic. If there are unpaired electrons, it is paramagnetic.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Molecular Orbital Theory

Molecular Orbital Theory describes how atomic orbitals combine to form molecular orbitals, which can be occupied by electrons. In diatomic molecules, these orbitals are filled according to their energy levels, influencing the molecule's stability and properties. The arrangement of these orbitals helps predict bond order, magnetic properties, and the overall behavior of the molecule.

Bond Order

Bond order is a measure of the number of chemical bonds between a pair of atoms, calculated as the difference between the number of bonding and antibonding electrons divided by two. A higher bond order indicates a stronger bond and greater stability of the molecule. For example, a bond order of 1 corresponds to a single bond, while a bond order of 2 indicates a double bond.

Magnetic Properties of Molecules

The magnetic properties of molecules are determined by the presence of unpaired electrons in their molecular orbitals. Molecules with unpaired electrons are paramagnetic and are attracted to magnetic fields, while those with all electrons paired are diamagnetic and are weakly repelled by magnetic fields. Understanding the electron configuration from the molecular orbital diagram is essential for predicting these properties.