Question

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Home Name: Homework 3. Organic Chemistry! 0 0 Figure 2: Molecular orbital diagram for H. Note: It is not always necessary to include the graphical pictures of the basis set atomic orbitals or of the molecular orbitals. In most cases the graphical representations are not included in MO diagrams 8. What would you predict would happen to Hif an extemal Lewis base was able to donate an electron pair to the antibonding orbital CH? 9. Draw a molecular orbital diagram for He. Based on the MO diagram you drew what conclusions could you draw about He? Explain. (You do not have to draw the orbitals themselves, burbe sure to label all atomic and molecular orbitals appropriately.) Page 6 of 8

Answer 1

We'll focus the effect on bond order if two electrons are added in anti bonding molecular orbital.

am exteomal Leuis bae was able to clonate am electson pair to the this would be the Case Cumtibonding os btal of H,them * (Dovated by Lewis base) Enerys 1 Hli8) HIS) bonding ers7 12-27 e B.0 0 Now, Bond Csces e7s Art Hence f an electan pais to amtfbonelivng osbitals, the bond O oles become zeD hence these wtl be a H-H bond aun exlesnal Leuis base woas able to clonate ptuse 09 He s2 He - IS2 | As these LA20 -two es un omdg molecular osbitc and Hwo es n eunothes The Bond 06des uu ) (Amfboneiny 1L He(ls) He(is) be 2-27 B.0 (Bana Ad's 2 Ao'S B.D0 MO'S Hence He uis not mose likely to fom He, ire Helium motecule