Anionic Tantalum Dihydride Complexes: Heterobimetallic Coupling Reactions and Reactivity toward Small-Molecule Activation
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https://figshare.com/articles/dataset/Anionic_Tantalum_Dihydride_Complexes_Heterobimetallic_Coupling_Reactions_and_Reactivity_toward_Small_Molecule_Activation/2191762
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资源简介：
The
anionic dihydride complex [Cp2TaH2]− was synthesized as a well-defined molecular species by deprotonation
of Cp2TaH3 while different solubilizing agents,
such as [2.2.2]cryptand and 18-crown-6, were applied to encapsulate
the alkali-metal counterion. The ion pairs were characterized by multiple
spectroscopic methods as well as X-ray crystallography, revealing
varying degrees of interaction between the hydride ligands of the
anion and the respective countercation in solution and in the solid
state. The [Cp2TaH2]− complex
anion shows slow exchange of the hydride ligands when kept under a
D2 atmosphere, but a very fast reaction is observed when
[Cp2TaH2]− is reacted with
CO2, from which Cp2TaH(CO) is obtained as the
tantalum-containing reaction product, along with inorganic salts.
Furthermore, [Cp2TaH2]− can
act as a synthon in heterobimetallic coupling reactions with transition-metal
halide complexes. Thus, the heterobimetallic complexes Cp2Ta(μ-H)2Rh(dippp) and Cp2Ta(μ-H)2Ru(H)(CO)(PiPr3)2 were synthesized
and characterized by various spectroscopies and via single-crystal
X-ray diffraction. The new hydride bridged tantalum–rhodium
heterobimetallic complex is cleaved under a CO atmosphere to yield
mononuclear species and slowly exchanges protons and hydride ligands
when exposed to D2 gas.
创建时间：
2016-02-14
