Attempt to make a graphical model of BeH2: Be:1s2 2s2 H:1s1 H:1s1 1s 1s 2s 1s H Be 1s 1s H+ Be 2s H+Be 1s 1s 2s 1s 2pz 2pz These two are no good: One orbital can't hold four electrons X-6
These two are no good: One orbital canʼt hold four electrons ? 2s 1s H Be H 1s + Be: 1s2 2s2 2s 2pz + + 2s 2pz H Be H 1s 1s + + H: 1s1 1s + H: 1s1 1s + 2pz H + Be H 1s 1s Attempt to make a graphical model of BeH2: X-6
Attempt to make a graphical model of BeH2: Be:1s2 2s2 H:1s1 H:1s1 1s 1s 2s 90° 1s H H Be 1s 2s 2pz 2pz This one is no good: According to VSEPR,the bond angle should be 180
90° This one is no good: According to VSEPR, the bond angle should be 180°. ? 2s 1s H Be H 1s + Be: 1s2 2s2 2s 2pz + + 2s 2pz H Be H 1s 1s + + H: 1s1 1s + H: 1s1 1s + 2pz H + Be H 1s 1s Attempt to make a graphical model of BeH2: X-7
Attempt to make a graphical model of BeH2: Be:1s2 2s2 H:1s1 H:1s1 + 1s 1s 2s 1s 1s 2s 2pz 2pz Unfortunately,none of these models make sense. X-8
Unfortunately, none of these models make sense. ? 2s 1s H Be H 1s + Be: 1s2 2s2 2s 2pz + + 2s 2pz H Be H 1s 1s + + H: 1s1 1s + H: 1s1 1s + 2pz H + Be H 1s 1s Attempt to make a graphical model of BeH2: X-8
hybridized the orbitals... Maybe if we blended the orbitals together... Be 2s 2pz 2s 2pz 2 sp hybrids □ X-9
Maybe if we blended the orbitals together... hybridized the orbitals... 2 sp hybrids + 2s 2pz + 2pz + + 2s Be X-9
Hybridization in terms of electron configuration: Unhybridized Be 2p 2P2 2px 2s Decouple 2s 1s 计 electron pair ○1s X-10
Hybridization in terms of electron configuration: 2pz 2s 1s 2s 2p 2py 2px 1s Decouple electron pair Be Unhybridized X-10