Structural, spectroscopic and redox studies of mer-[RuX3L3] (L = PMe2Ph or AsMe2Ph, X = Cl or Br). Crystal structures of mer-[RuX3(AsMe2Ph)3] (X = Cl or Br) and [Ru2X5(EMe2Ph)4] (X = Br, E = P or As; X = I, E = As)
Abstract
The complexes mer-[RuX
3
L
3
]
(X = Cl or Br, L = PMe
2
Ph or
AsMe
2
Ph) have been re-examined and assignments for their
UV/VIS spectra proposed. Attempts to prepare analogues with
X = I or L = SbR
3
have been
unsuccessful. Cyclic voltammetry revealed only irreversible oxidation
and reduction processes and chemical oxidation with halogens resulted in
decomposition to [RuX
6
]
2-
, in contrast to
the chemistry of related osmium compounds. The crystal structures of
mer-[RuX
3
(AsMe
2
Ph)
3
]
(X = Cl or Br) have been determined and confirm the
geometrical isomer formed. Crystal structures were also determined for
[Ru
2
X
5
L
4
] (X = Br,
L = PMe
2
Ph or AsMe
2
Ph;
X = I, L = AsMe
2
Ph) obtained by
decomposition of mer-[RuX
3
L
3
] in
solution, which are the first structurally characterised examples of
Ru
2
5+
dimers of this type with bromide or iodide
co-ligands. The structures are consistent with a formal Ru–Ru
bond order of ½.
Please wait while we load your content...
