Synthesis of Heterobimetallic Complexes by Coordination
of Rhodium(III) and Iridium(III)
Poly-N,O-NHC Complexes to Silver(I), Copper(II), and Zinc(II)
Posted on 2018-05-18 - 18:22
The reaction of [RhCl2(Cp*)]2 with 2-trimethylsiloxyphenyl
isocyanide (1) led to the mononuclear diisocyanide complex
[RhCl(Cp*)(1)2]. Cleavage of the Si–O
bonds of the coordinated isocyanide ligands with a catalytic amount
of KF and H2O gave the neutral rhodium(III) complex [RhCl(Cp*)(NH,O-NHC)(N,O-NHC)]
([2]) bearing a C2-metalated N,O-benzoxazolinato ligand
and an NH,O-benzoxazolin-2-ylidene ligand. In the presence of AgBF4 the same reaction sequence with [MCl2(Cp*)]2 (M = Rh, Ir) and 1 led to the removal of all
halogeno ligands and formation of the complexes [M(Cp*)(NH,O-NHC)(N,O-NHC)2] (M = Rh, [3]; M = Ir, [4]) bearing
one C-metalated NH,O-NHC benzoxazolin-2-ylidene and two C-metalated
N,O-benzoxazolinato ligands. Deprotonation of the remaining N–H
function in complexes [3] and [4] generated
complexes with three amido donor functions which act as tripodal metalloligands
for the coordination to additional transition metals such as AgI, CuII, and ZnII, thus allowing the
preparation of the polynuclear heterobimetallic complexes [5]–[10] bearing C/N-metalated benzoxazolinato
ligands.
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Tegethoff, Michael; Roelfes, Florian; Schulte to Brinke, Christian; Tsai Yuan Tan, Tristan; Kampert, Florian; Jin, Guo-Xin; et al. (2018). Synthesis of Heterobimetallic Complexes by Coordination
of Rhodium(III) and Iridium(III)
Poly-N,O-NHC Complexes to Silver(I), Copper(II), and Zinc(II). ACS Publications. Collection. https://doi.org/10.1021/acs.organomet.8b00252
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AUTHORS (7)
MT
Michael Tegethoff
FR
Florian Roelfes
CS
Christian Schulte to Brinke
TT
Tristan Tsai Yuan Tan
FK
Florian Kampert
GJ
Guo-Xin Jin
FH
F. Ekkehardt Hahn