chap 20

10問 • 8ヶ月前

問題一覧

In the molecular orbital description of NO, why is the molecule paramagnetic?

A) It has an unpaired electron in a degenerate n bonding orbital

What is a key difference in the molecular orbital diagram of a heteronuclear diatomic molecule like HF compared to a homonuclear molecule like H2?

C) The molecular orbitals result from combinations of orbitals with very different energies

Which of the following statements best describes the bonding in carbon monoxide (CO) using molecular orbital theory?

B) The bonding MOs are mainly derived from oxygen's atomic orbitals

In the LCAO approach, why is the overlap integral S important when constructing molecular orbitals?

C) It quantifies the spatial overlap between atomic orbitals

What is the main criterion for two atomic orbitals to effectively combine into molecular orbitals using the LCAO approach?

C) They must have similar energies and compatible symmetry

For homonuclear diatomic molecules like B2 and C2, what change occurs in the ordering of molecular orbitals compared to 02 and F2 ?

C) π2p is lower in energy than o2p

Born-Oppenheimer approximation in the context of molecular systems?

B) The separation of nuclear and electronic motion due to mass differences

In the electronic solution of the hydrogen molecular ion H2+, which type of orbital combination leads to bonding molecular orbitals?

B) Symmetric (constructive) combination of 1s orbitals

What is the bond order of the B2 molecule based on molecular orbital theory?

B) 1

Why does the Born-Oppenheimer approximation become less accurate for systems involving very light nuclei or high vibrational excitations

C) The assumption of separable nuclear and electronic motion breaks down

biochem

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inorg

inorg

phychem

phychem

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