10 - CH 310M/318M Lecture 7 W 2/3/2010 Reading Assignment:...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CH 310M/318M – Lecture 7 – W 2/3/2010 Reading Assignment : Sections 2.1, 2.2 Graded Homework : HW#03 deadline = 9:00 a.m. on Fri 2/5 HW#04 deadline = 5:00 p.m. on Tue 2/9 (this assignment will be available later today!!!) Textbook Problems : 1.19, 1.60-1.63, 1.77 Last Time : Resonance (continued…) Valence bond theory and hybrid orbitals Today : Valence bond theory and hybrid orbitals (continued…) If you have an excusable conflict for ANY of the three midterm exams, the deadline to sign up to take a conflict exam is 5:00 p.m. on Friday, February 5 . Planning on taking Organic II??? An information session about the Summer 2010 “Organic Chemistry in Spain” program will be held THURSDAY, 2/4 @ 5:00 p.m. in WCH 1.108 Molecular orbital theory
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How about a valence bond description of ethylene, C 2 H 4 , which has a total of 12 valence electrons??? C C H H H H Each C atom is surrounded by 3 electron groups TRIGONAL PLANAR GEOMETRY 120 ° “Top” View (all atoms are coplanar) C C H H H H “Side” View Neither C atom uses sp 3 hybrid orbitals to form bonds, since neither C atom has a TETRAHEDRAL arrangement of electron groups surrounding it!!! Energy 2s 2p “Mix” 2s + 2p x + 2p y Energy three equivalent sp 2 hybrid orbitals unhybridized 2p z orbital is “left over” The sp 2 hybrid orbitals point in a trigonal planar arrangement… (valence shell orbitals for C)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 13

10 - CH 310M/318M Lecture 7 W 2/3/2010 Reading Assignment:...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online