Molecular orbitals upshot from the co-operation of minute orbitals. Acetylene, HC = CH, has a triple obligation betwixt the carbon atoms (undivided sigma obligation and brace pi obligations). Assume that entire of the obligationing is the upshot of the overlap of p orbitals. Sketch (with befitting shading) and mark the overlap regions (cartoons of Phi) of p orbitals that conceive the obligationing molecular orbitals on the subjoined co-linear x axes. a. The sigma obligation. b. Undivided pi obligation. C. The other pi obligation.