2020年1月14日 · Here, there are three oxalate $\ce{C2O4^2-}$ ligands arranged in distorted octahedral environment (depicted with semi-transparent coordination polyhedron). Each oxalate is a bidentate chelating ligand, resulting in C.N. 6 of chromium center.

THE X-ray diffraction data of van Niekerk and Schoening1, obtained from a sample of red potassium chromi oxalate prepared in these laboratories and corresponding analytically to...

2022年11月1日 · The results showed that NiFe-[Cr(C 2 O 4) 3] 3--LDHs exhibited better performance than NiFe LDHs after BET normalization, indicating NiFe-[Cr(C 2 O 4) 3] 3--LDHs with higher intrinsic activity for electrocatalytic OER which was closely related to electron reconfiguration dynamically during OER process.

通过原位 X 射线吸收光谱、拉曼光谱和准原位 X 射线光电子能谱揭示催化性能。随着金属位点的调制电子结构，NiFe-[Cr(C 2 O 4) 3] 3--LDHs表现出促进的OER性能，在10 mA cm -2 的电流密度下具有236 mV的较低过电位。

Cr (C 2 O 4) 3 3- This is the complex ion formed by attaching 3 ethanedioate (oxalate) ions to a chromium(III) ion. The shape is exactly the same as the previous nickel complex.

Mg，Al层状双氢氧化物（LDH）在中间层中具有[Cr（C（2）O（4））（3）]（3）（-）阴离子，它通过以下两种不同途径合成：从轻度煅烧中重建Mg，Al-碳酸LDH以及来自Mg-Al-硝酸LDH的阴离子交换。

For example the inert chiral complex [Co ( C2O4)3]3- ( d6, low spin) can be resolved but the labile complex [Fe ( C2O4)3]3- ( d5, high spin) cannot. Resolution of complexes generally involves the presence of chelating ligands.

2020年11月21日 · To get a complex $\ce{[Cr(C2O4)3]^{2-}}$, $\ce{Cr}$ oxidation number should be equal to $x$, with $x + 3(-2) = -2$. So $x$ = $+4$ or +IV. And unfortunately, this oxidation number IV does not exist for $\ce{Cr}$ in solution.

In the title hybrid salt, (C7H11N2)3[Cr(C2O4)3]·4H2O, the central CrIIIion of the complex anion (point group symmetry 2) is coordinated by six O atoms from three chelating oxalate(2−) ligands in a slightly distorted octahedral coordination sphere.

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