Chemistry Reference
In-Depth Information
Fig. 9.10 Electronic absorption spectra of [Pt
2
(EtCS
2
)
4
I]
1
(2), [Pt
2
(EtCS
2
)
4
], and [Pt
2
(EtCS
2
)
4
I
2
]
in the solid-state (KBr-pressed disks) [
32
]
Table 9.3 Electronic absorption spectral data of [Pt
2
(RCS
2
)
4
I]
1
(R
Me (1), Et (2),
n
-Pr (3),
n
-Bu (4),
n
-Pen (5), and
n
-Hex (6)) in the solid-state, together with that of [Pt
2
(EtCS
2
)
4
] and
[Pt
2
(EtCS
2
)
4
I
2
]
¼
Wave number/10
3
cm
1
References
[Pt
2
(EtCS
2
)
4
I]
1
(2)
7.9, 17.7, 24.6 (sh), 33.0
[
32
]
[Pt
2
(EtCS
2
)
4
]
17.0, 23.4, 29.2
[
32
]
[Pt
2
(EtCS
2
)
4
I
2
]
17.4, 21.8 (sh), 26.1 (sh), 29.2, 33.1
[
32
]
[Pt
2
(MeCS
2
)
4
I]
1
(1)
7.5, 17.9, 24.5 (sh), 31.8
[
28
]
[Pt
2
(
n
-PrCS
2
)
4
I]
1
(3)
9.3, 17.9, 24.6 (sh)
[
55
]
[Pt
2
(
n
-BuCS
2
)
4
I]
1
(4)
9.0, 18.1, 24.6 (sh), 32.8
[
55
]
[Pt
2
(
n
-PenCS
2
)
4
I]
1
(5)
9.0, 17.8, 24.8 (sh), 32.9
[
35
]
5.6
a
[Pt
2
(
n
-HexCS
2
)
4
I]
1
(6)
[
36
]
Measured as KBr or KI pressed disks at 298 K.
sh
shoulder
a
An absorption band in near IR reagion is only reported.
compound 1 shows relatively high-electrical conductivity (13 S cm
1
), which is
about nine orders of magnitude higher than the typical value of a MX-chain
complex. This value is also 10
4
times greater than that of K
4
[Pt
2
(pop)
4
Br]
3H
2
O[
20
]
but are ca. ten times lower than that found in K
2
[Pt(CN)
4
]Br
0.3
3H
2
O (KCP(Br))
[
61
]. The metallic conductivity in the one-dimensional (1D) halogen-bridged metal
complexes has been observed for the first time for [Pt
2
(MeCS
2
)
4
I]
1
(1) above
T
M-S
¼
300 K [
31
]. This is the second example, following KCP(Br), of a transition
metal complex exhibiting metallic transport under ambient pressure without
p
-
electronic system of ligands. The resistance drop resulting from the order-disorder
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