Chem-Chapter 10.docx

5 Pages
139 Views
Unlock Document

Department
Chemistry
Course
CHEM 1320
Professor
Ganley
Semester
Fall

Description
Chapter 10: Chemical Bonding II 11/13  Atomic Orbitals (AOs) Quantum theory: Electrons exist only at discrete energy levels  Electrons have wave properties Wavefunction: probability that an electron will be at a               certain location AO: Area around a nucleus likely to contain an electron  Each orbital can have 2 electrons (max) How does Lewis theory explain the bonds in H  an2 F ? 2 Sharing of two electrons between the two atoms Bond Distance Energy    Bond Length     Overlap of H 2 436.4 kJ/mol 74pm 2 1s F2 150.6 kJ/mol 142pm 2 2p Valence Bond Theory: ­Valence Bond model: ­ ­Covalent bonds form by combining valence e  orbitals ­AOs combine, overlap, and orbit both nuclei ­Overlap: along an imaginary line connecting the nuclei Overlap of two “s” electrons: σ­bond Hybrid Orbitals: ­Methane (CH ) 4 ­4 C­H 3onds, all the same ­All sp ­s σ bonds Hybridization–mixing of two or more atomic orbitals  ▯hybrid  orbitals 1. Mix at least 2 nonequivalent atomic orbitals (s and p). Hybrid  orbitals: different shape 2. # Hybrid orbitals = # atomic orbitals used 3. Covalent bonds are formed by: a. Overlap of atomic orbitals b. Overlap of hybrid orbitals with atomic orbitals c. Overlap of hybrid orbitals Ethane (C H2) 6 3 C­H are a sp3­s 3 bonds C­C is a sp ­sp  σ bond Lewis theory and NH : 3 If the bonds form from overlap of 3 2p orbitals on nitrogen with  the 1s orbital on each hydrogen atom, what would the molecular  geometry of NH  be3 How do I predict the hybridization of an atom? Count the # of lone pairs AND the # of atoms bonded *7A (if they have one bond) and H are unhybridized # of Lone Pairs + # of Bonded Atoms  Hybridization Examples 2 sp
More Less

Related notes for CHEM 1320

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit