Synthesis and characterisation of three Group 10 metal dithiadiazolyl
complexes
Abstract
Reaction of (PhC![[upper bond 1 start]](https://www.rsc.org/images/entities/char_e010.gif)
NSSN![[upper bond 1 end]](https://www.rsc.org/images/entities/char_e011.gif)
)
2
with
[Pt(PPh
3
)
3
] or [Pt(PPh
3
)
4
]
produced two complexes
[Pt{SNC(Ph)NS-S,S′}(PPh
3
)
2
] 1 and
[Pt
3
{µ-SNC(Ph)NS-S,S′}
2
(PPh
3
)
4
] 2. In contrast,
reaction with [Pd(PPh
3
)
4
] yielded only the
trimetallic complex
[Pd
3
{µ-SNC(Ph)NS-S,S′}
2
(PPh
3
)
4
] 3. The three complexes
were characterised by X-ray crystallography as the following solvates:
1·MeCN, 2·2C
6
H
5
Me and
3·2CH
2
Cl
2
. In all three structures
the S–S bond is formally broken [d
ss
in
1, 2 and 3 are 3.168(4), 3.046(8) and 3.044(8)
Å respectively], the metals increase their oxidation states to +2 and
possess square-planar co-ordination geometries. The physical properties of
the complexes are described and the biological activities of 1 and
2 are reported.
NSSN)
2
with
[Pt(PPh
3
)
3
] or [Pt(PPh
3
)
4
]
produced two complexes
[Pt{SNC(Ph)NS-S,S′}(PPh
3
)
2
] 1 and
[Pt
3
{µ-SNC(Ph)NS-S,S′}
2
(PPh
3
)
4
] 2. In contrast,
reaction with [Pd(PPh
3
)
4
] yielded only the
trimetallic complex
[Pd
3
{µ-SNC(Ph)NS-S,S′}
2
(PPh
3
)
4
] 3. The three complexes
were characterised by X-ray crystallography as the following solvates:
1·MeCN, 2·2C
6
H
5
Me and
3·2CH
2
Cl
2
. In all three structures
the S–S bond is formally broken [d
ss
in
1, 2 and 3 are 3.168(4), 3.046(8) and 3.044(8)
Å respectively], the metals increase their oxidation states to +2 and
possess square-planar co-ordination geometries. The physical properties of
the complexes are described and the biological activities of 1 and
2 are reported.
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