04 - Handout#3 5.12 Spring 2003 Physical Properties Bond...

Info iconThis preview shows pages 1–2. 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
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Handout #3, 5.12 Spring 2003, 2/12/03 Physical Properties: Bond Length, Bond Strength & Acidity A. Bond Lengths: mostly dependent on atomic size, bond order, and hybridization sp 3 sp 2 sp C H C H C H 1.09 1.086 1.06 • Effect of hybridization on length of single bonds: C–H and C–C bonds shorten slightly with increased s character on carbon sp 3 – sp 3 C C C C C C 1.54 1.50 1.47 sp 3 – sp 2 sp 3 – sp Bond Lengths ( Å ) B. Bond Strengths/Bond Dissociation Energies (BDEs): Energy for homolytic bond cleavage to uncharged radical fragments C C C C C C C H 81 198 145 98 C O C O 79 173 Common Bond Strengths (kcal/mol) • Bond dissociation energies are for a particular molecule and are dependent on the specific molecular structure (Bond Strength ± 20 kcal/mol) X X X . X . • Multiple Bonding: Bond strength depends strongly on bond order (strength: single < double < triple) sp 3 – sp 3 C C C C C C 1.54 1.34 1.20 sp 2 – sp 2 sp – sp sp 3 – sp 3 C O C O 1.42 1.22 sp 2 – sp...
View Full Document

This note was uploaded on 11/27/2011 for the course CHEMICAL E 20.410j taught by Professor Rogerd.kamm during the Spring '03 term at MIT.

Page1 / 2

04 - Handout#3 5.12 Spring 2003 Physical Properties Bond...

This preview shows document pages 1 - 2. Sign up to view the full document.

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