59 291 c2 be1u4 4 0 124 590 n2 be1u43g2 6 0 109 942

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ot
always
 as
shown
 1πu(y)
 3σg
 2σu
 2σg
 Diatomic
molecule
energy
diagrams
 Electronic
configuraNons
of
diatomics
 Molecule
 Electron
 configura.on
 Excess
of
 bonding
 electrons
 No.
of
 unpair
 electrons
 Bond
 Dissocia.on
 length
Å
 energy

 kJ/mol
 Li2
 (2σg)2
 2
 0
 2.67
 107
 Be2
 (2σg)2(2σu)2
 0
 0
 ‐
 ‐
 B2
 [Be](1πu)2
 2
 2
 1.59
 291
 C2
 [Be]
(1πu)4
 4
 0
 1.24
 590
 N2
 [Be]
(1πu)4(3σg)2
 6
 0
 1.09
 942
 O2
 [Be]

(1πu)4
 (3σg)2(1πg)2
 4
 2
 1.21
 494
 F2
 [Be]

(1πu)4
 (3σg)2(1πg)4
 2
 0
 1.44
 154
 Hueckel
theory
of
π
systems

 We
assume
that
the
σ
electrons
that
provide
the
scaffold
to
organic
molecules

are
 Separated
from
the
P
electrons
(or
the

π
system).
Consider
for
example
ethene:
 H
 H
 C
 H
 C...
View Full Document

Ask a homework question - tutors are online