Bond lengths and angles in C
2
H
6
, C
2
H
4
, and C
2
H
6
ethane
ethene
ethyne
C-C 154 pm
C-C 133 pm
C-C 120 pm
C-H 110 pm
C-H 108 pm
C-H 106 pm
H-C-C 109.6°
H-C-C 121.7°
H-C-C 180°
