Chemistry Reference
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Fig. 10.8 K
þ
O coordination bonds (
left
) and N
þ
H
O hydrogen bonds (
right
)in
K
2
(NC
5
N)[Pt
2
(pop)
4
I]
4H
2
O
Fig. 10.9 The difference between
∠
(O-N-O) and
∠
(O-A-O) and difference in
d
(Pt-I-Pt) of
(NC
5
N)
2
[Pt
2
(pop)
4
I]
4H
2
O and K
2
(NC
5
N)[Pt
2
(pop)
4
]
4H
2
O
electron distribution of A
+
. In other words, oxygen atoms can coordinate to A
+
from
any direction unless steric hindrance among oxygen atoms occurs. In contrast,
∠
(H-N-H) is limited around 109
due to the characteristic of sp
3
orbital, hence
typical (O-N-O) is not smaller than 109
. Schematic representation of the com-
parison between (NC
5
N)
2
[Pt
2
(pop)
4
I]
4H
2
O and K
2
(NC
5
N)
2
[Pt
2
(pop)
4
I]
4H
2
O are
shown in Fig.
10.9
.
Although the most pop-type MMX chains synthesized so far were less conduc-
tive (the typical electrical conductivity at room temperature (
10
7
Scm
1
),
MMX chains with binary countercations show the higher conductivity, at most
10
2
Scm
1
, due to the short
d
(Pt-I-Pt) [
31
,
46
].
s
RT
)
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