Does the SP3 bond break when its fragments are rotated? (There are no sp3 bonds. - GS). Also, can you please give an explanation on this concept. Thanks!  (Sigma-bonds do not break, because the bond-forming orbitals (may involve sp3-orbitals), overlap in only one area. Pi-bonds break, because the bond-forming p-orbitals overlap in two areas, which have to disconnect during the rotation.. - GS).