Chemistry 105 Notes
Chemistry 105 Notes Chemistry 105
Popular in Chem 105: Principles of Chemistry
Popular in Chemistry
This 2 page Class Notes was uploaded by Emma Silverman on Monday April 20, 2015. The Class Notes belongs to Chemistry 105 at Washington State University taught by Finnegan in Spring2015. Since its upload, it has received 85 views. For similar materials see Chem 105: Principles of Chemistry in Chemistry at Washington State University.
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Date Created: 04/20/15
41315 Molecular orbital theory When wave functions orbitals overlap they can either add to form a bonding orbital constructive interference or cancel out to form an antibonding orbital destructive interference These are no longer atomic orbitals They are molecular orbitals Note that the total number of orbitals is unchanged two atomic orbitals create two molecular orbitals Molecular orbitals can be sigma or pi orbitals Antibonding orbitals are indicated with an asterisk This theory can be used to predict bond order and magnetic properties bond order12bonding e39antibonding e39 unpaired electrons paramagnetic all paired diamagnetic predict bond order and magnetic properties for H2 He2 and He2 41515 With the 2nd period elements there are more levels There are also some complications due to mixing of the atomic orbitals 1Use molecular orbital theory to rank N239 N22 and N in order of increasing bond length N239ltN2239ltN2339 Bond order 15lt20lt25 Higher bond order the shorter the bond 2Use molecular orbital theory to rank 02 0239 and 02239 in order of increasing magnetic moment 02gt02gt022 41715 How molecular orbital theory explains polar bonds and ionic character For two like atoms the energy of the atomic orbitals is equal The splitting of the bonding and antibonding molecular orbitals is centered at the energy levels of the atomic orbitals If the two atoms are different the more electronegative atom has orbitals of lower energy than the other atom Atom b is more electronegative that atom a A molecular orbital that is almost a pure atomic orbital is called a nonbonding orbital There are bonding molecular orbitals antibonding molecular orbitals nonbonding molecular orbitals Learning Catalytics According to M0 theory what is the bond order of CO 3 According to M0 theory what is the bond order of COZ39 2 According to M0 theory what is the bond order of COZ 3 Which of the following are paramagnetic COZ CO39COCOCO2
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