H H Bond Lengths More s character, so shorter length Three bonding overlaps so shorter 1.54A 1.33A 1.20A H日 H C=C H一C≡C—H H HH HH 1.09A 1.08A 1.06A ethane ethene ethyne Bond angle is 180, so linear geometry. Chapter 9 12Chapter 9 12 Bond Lengths • More s character, so shorter length. • Three bonding overlaps, so shorter. Bond angle is 180, so linear geometry. =>