Lecture 9- cyclohexanes

Lecture 9- cyclohexanes - Lecture 9 Cyclohexanes Cis,trans...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 9 Cyclohexanes Cis,trans isomerism Finish Chapter 2!!! Last Time: • Conformational Analysis – Newman projections and cycloalkanes • Cyclohexanes – chair conformation has NO strain energy! • How to draw chairs V. Patman 2 Tues 2.15.11 V. Patman 2 Chair Flips • Via boat conformer V. Patman 3 Tues 2.15.11 Consider Maxima – Why So Costly? • Boat • ½ chair – Net – 10 kcal/mol barrier to interconversion, 5 x 10 5 “ring flips”/sec. At low T (-90 o C), it is possible to separate them. V. Patman 4 Tues 2.15.11 Substituted Cyclohexanes • Ethyl Cyclohexane • Size Matters – As you increase the size of the “R” group on the ring, the less favorable occupation of an axial site will be. V. Patman 5 Tues 2.15.11 ∆ G = -RTlnK eq Disubstituted Cyclohexanes • 1-isopropylcyclohexanol • 1-bromo-1-methylcyclohexane V. Patman 6 Tues 2.15.11 Disubstituted Cyclohexanes...
View Full Document

This note was uploaded on 09/25/2011 for the course CH 318M taught by Professor Bocknack during the Spring '08 term at University of Texas at Austin.

Page1 / 17

Lecture 9- cyclohexanes - Lecture 9 Cyclohexanes Cis,trans...

This preview shows document pages 1 - 7. Sign up to view the full document.

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