Chemistry Reference
In-Depth Information
Fig. 17 Condensed clusters based on the fusion of icosahedra
(sec) for the dimer is 14 rather than 16 as observed for the vertex sharing pair of
icosahedra.
The 19 atom fused icosahedron has the skeletal molecular orbitals shown in
Fig.
19
and the number of bonding skeletal molecular orbitals is reduced to four:
[1S
σ
]
2
[1P
z
σ
]
2
, [1P
x,y
σ
]
4
because the doubly noded linear combinations which have
D symmetry are too strongly antibonding to be accessible. The more condensed
structure effectively makes the out-of-phase (p
x
,
y
p
x
,
y
) linear combinations more
strongly antibonding and therefore unavailable, i.e. it resembles the multiply
bonded diatomics N
2
and C
2
.
