C2Hg Now bond the two C together: Notice that the two sp2 orbitals form a o orbital that is rotationally symmetric 0* 1c 2sp2 60 2sp2 X-13C C H H H H C2H4 H p H H p H Now bond the two C together: Notice that the two sp2 orbitals form a σ orbital that is rotationally symmetric. H p H H p H 2sp2 σ* σb C 2sp2 C XI-13