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Unformatted text preview: complex has hydride ligands capping the trigonal prismatic faces. Construct the MO diagram for The ReH 9 2– . a. Make a LCAO of two H 3 molecules interacting face-to-face. b. Place W between the two H 3 faces and then perturb the orbitals. c. Mix another set of H 3 orbitals into the MO diagram you made in (b) to arrive at the MO diagram for. 3. Consider a one-dimensional chain of orbitals, for example polyacetylene. (a) Use Hückel theory to generate the energy bands for a geometry in which all C–C distances are equal. (b) Now generate the energy bands a geometry with alternating long and short C–C bonds. Use β for the H ij across short bonds and β /2 across long bonds. (c) Will polyacetylene in either one or both geometries be a metal or an insulator?...
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