Leroy Posted March 21, 2004 Share Posted March 21, 2004 I was wondering why two substances can either react with one other when one is in the LUMO state and the other in the HOMO state. Why can't a LUMO react with another LUMO if there are no hinderances or a HOMO/HOMO reaction? Link to comment Share on other sites More sharing options...
Leroy Posted March 21, 2004 Author Share Posted March 21, 2004 probably should have put this in quantum and theoretical chemistry.. sorry Link to comment Share on other sites More sharing options...
wolfson Posted March 21, 2004 Share Posted March 21, 2004 The reaction of alkenes with H-X, where the HOMO is the pi MO of the alkene and the LUMO is the H-X. Link to comment Share on other sites More sharing options...
chemistry Posted March 22, 2004 Share Posted March 22, 2004 Well, think about it. Lowest unoccupied molecular orbital with another unoccupied molecular orbital, no covalent bonding can take place. Link to comment Share on other sites More sharing options...
blike Posted March 22, 2004 Share Posted March 22, 2004 Indeed. Just remember that the outermost electrons of one atom (HOMO) will bond with the lowest unoccupied shell (LUMO) on the other atom. LUMO can't bond with LUMO because LUMO means that the orbital is unoccupied. Thus, there are no electrons to bond! HOMO won't bond with HOMO because the orbital is already occupied. Link to comment Share on other sites More sharing options...
Leroy Posted March 22, 2004 Author Share Posted March 22, 2004 right... i should have thought about it like that as wel... dumbass me Link to comment Share on other sites More sharing options...
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