自秋不转大对 Bond Lengths More s character,so shorter length. Three bonding overlaps,so shorter. 1.54A 1.33 1.20A H H H H一CC一H H H H H 1.09A 1.08A 1.06A ethane ethene ethyne Bond angle is180°，so linear geometry.Bond Lengths ◼More s character, so shorter length. ◼Three bonding overlaps, so shorter. Bond angle is 180, so linear geometry