Bond Lengths More s character,so shorter length. Three bonding overlaps,so shorter. 1.54A 1.33A -1.20A H H一C三C一H H 1.09A 1.08A 1.06A ethane ethene ethyne Copyright2005 Pearson Prentice Hall,Inc. Bond angle is180°，so linear geometry. Chapter 9 12 Chapter 9 12 Bond Lengths • More s character, so shorter length. • Three bonding overlaps, so shorter. Bond angle is 180, so linear geometry. =>