Questions tagged [coordination-compounds]
This tag is for questions concerning coordination compounds including but not limited to ligand properties, metal properties, orbital splitting, micro- and macroscopic properties of entire complexes etc. For complexes where carbon monoxide is the only ligand, use the [carbonyl-complexes] tag instead. For organic catalysts or proteins, the tag is applicable if the question is about the metal’s direct coordination sphere.
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Understanding (PuCl6)2-
So $\ce{[PuCl6]^2-}$ is an anion comprised of $\ce{Pu^4+}$ and $\ce{Cl-}$, and $\ce{Cl-}$’s 3 p orbitals and $\ce{Pu^4+}$’s d2sp3 hybrid orbitals bond.
And the d2sp3 hybrid orbital of $\ce{Pu^4+}$ is ...
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Crystal Field Theory, in a tetrahedral complex, why would $d_{z^2}$ and $d_{x^2-y^2}$ be degenerated ? In terms of counting of repulsion
In Crystal Field Theory, for a tetrahedral (metallic) complex, shouldn't the $d_{z^2}$ and the $d_{x^2 - y^2}$ have different energies, since the repulsion between one lobe and ligands happens $2$ ...
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Why the colour of complexes is the complement of light absorbed? [closed]
From crystal field theory, the splitting of the degenerate $d$ orbitals gives the opportunity for electrons to be promoted, and therefore absorb some light. The colour of the complex is then ...
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What is the optical activity of EDTA-Zinc(II) ion?
In this compound, the ligand EDTA is apparently optically active according to my textbook.
But I have found that in similar compounds like $\ce{[Co(EDTA)]-}$ do not exhibit optical isomerism
as in the ...
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Why does an atom become positively charged when it shares its lone pair? [closed]
Why does an atom become positively charged when it shares its lone pair?
In NH3, Nitrogen doesn't get positive charge when forming covalent bond with Hydrogens. But why does it get positive charge ...
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Synthesis of Gilman reagent
So I will be refering to the image attached here while explaining my query. In the synthesis of Gilman reagent, in the 3rd step, my teacher told that the (R-) from RLi will attack the partially ...
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How to make the energy level diagram of dichlorodiammineplatinum(II)?
The oxidation state of platinum in $\ce{[PtCl2(NH3)2]}$ complex is $+2,$ so its configuration will be $\ce{5d^8 6s^0 6p^0}$ and the shape will be square planar.
But this complex has two strong field ...
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How to draw complex speciation diagram?
Given complexation reactions for a specific Metal $X$ and Ligand $L$:
$$
XL_i + L \rightleftharpoons XL_{i+1}, k_i = \frac{XL_{i+1}}{XL_i \cdot L}
$$
It's usual to draw a speciation diagram such those:...
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Why does my EBT indicator not turn pink in EDTA titration?
I am working on finding the calcium content lost upon cooking kale, using complexometric titration. For my indicator, I am using Eriochrome Black T indicator (EBT; solid form, not the liquid).
...
user146547
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Is double excitation of nitrogen possible, and would it be able to use it as a central atom in a coordination complex?
I’m 17 and in my 2nd year of high-school (we have it a tad different here in the Czech Republic) and am interested in theoretical chemistry so that’s the explanation of the nature of my question.
So, ...
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Paramagnetism in coordination complexes
A complex is classified as paramagnetic or diamagnetic based on the electronic configuration of the central atom/ion. Should the properties (para/dia) of surrounding ligands also affect the nature of ...
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How does Hexaaquanickel(II) show color
I have studied that there must be unpaired electrons in $t_2g$ orbitals so that they can make transition to the eg orbital by absorbing energy from light. But in $\ce{[Ni(H2O)6]^2+}$ $\ce{Ni^2+}$ has $...
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Splitting of the d$_{xy}$ orbital in square planar transition metal complexes
In square planar complexes, the d$_{x^2-y^2}$ occupies the highest energy level due to it interacting greatest with the ligands. The d$_{z^2}$ orbital is also raised slightly higher in energy than the ...
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Difference in the absorption spectrum of gaseous atoms and complex ions
An absorbance spectrum is a graph that shows how much light is absorbed by the material at each wavelength of light. Both spectra are due to electronic transition, but for gaseous atoms, this spectrum ...
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Magnetic moment and pairing of electrons in hexaaquairon(III)
I understand that $\ce{H2O}$ acts as a strong ligand for $\ce{Fe^3+},$ $\ce{Cr^3+},$ and $\ce{Co^3+}.$ So, shouldn’t the electrons pair up in the $\mathrm{t_{2g}}$ orbitals? Wouldn’t that cause a ...
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