Solution will involve molecular orbitals - similar to atomic orbitals -
but centred around all of the nuclei in molecule. Each defined by sets of
quantum numbers,
Lecture 15
Molecular Orbitals for Diatomic Molecules
, Solution will involve molecular orbitals - similar to atomic orbitals -
but centred around all of the nuclei in molecule. Each defined by sets of
quantum numbers, with electron probability density determined by 2,
where = molecular wave function.
Approximate method:
At any moment, electron near one nucleus - approximate behaviour like
electron in atomic orbital for that atom. Over time - electron associated with
other nuclei in molecule. Therefore construct molecular orbitals (m.o.'s) by
forming:
Linear Combination of Atomic
Orbitals
, It is this, LCAO , m ethod w hich w e w ill use to construct
m .o's.
Simplest example - H2: two H atoms HA and HB
Only two a.o.'s (1sA, 1sB) to form linear combinations.
General rule: n a.o.'s n m.o.'s
So we can only construct 2 m.o.'s for H2 - and these are:
b = 1sA + 1sB and a = 1sA - 1sB
i.e. the sum (b) and the difference (a) of the constituent
a.o.'s.
Consider the electron distribution in each of these:
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller tandhiwahyono. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.60. You're not tied to anything after your purchase.