Questions tagged [spin]

Spin is a type of angular momentum which is intrinsic to atomic and sub-atomic particles. Electrons in orbitals can be either spin paired or spin unpaired which influences the magnetic properties of the species containing these orbitals.

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Is one electron spin preferred over the other in filling of orbitals? [duplicate]

When filling an orbital diagram of an atom, usually the up-spin is filled first and then the down-spin. For example, for Nitrogen, we have : But in a model in which up-spin electron is preferred ...
Peeyush Kushwaha's user avatar
3 votes
1 answer

Spin spin coupling in a proton NMR of an ester?

I am learning about proton NMR and spin-spin coupling, and am confused about whether splitting occurs over an ester bond. Specifically, in the case of ethyl methanoate, HCOOCH2CH3, if I were to number ...
Meep's user avatar
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2 votes
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Cu2+ octahedral complexes

$\ce{Cu}^{2+}$ has nine d-electrons, regardless of the ligand field strength it will have one free electron (so it is paramagnetic. Are $\ce{Cu}^{2+}$ octahedral complexes high spin or low spin?
EJC's user avatar
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Nuclear spin multiplicity of radicals

How do you calculate the nuclear spin multiplicity of radicals such as $\ce{N2H+}$? How does the net charge on the molecular species effect its overall nuclear spin?
stars83clouds's user avatar
5 votes
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How to derive the nuclear spin of 23Na?

Is it possible to derive the nuclear spin I=3/2 for $\ce{^23Na}$ from a term scheme or from something else from spectroscopy? I thought the nucleus spin is empirical (and cannot be calculated from J ...
laminin's user avatar
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10 votes
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Do electrons only fill 'spin up' first? Or could it start filling 'down spins' first? [duplicate]

Due to Hund's rule, electrons start filling up the orbitals without pairing up. When this is happening, do the electrons all fill up the 'up' spin? Could they fill in the 'down' spin? Why do they ...
IlIIlllIIIlIIlllIlIllIIIlIlI's user avatar
8 votes
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Total magnetic moment of atom

Whenever I read about coordination compounds in my textbooks, I always find a discussion about spin-only magnetic moment which is given by $\sqrt{n(n+2)}\cdot\mu_\mathrm{B}$, where $n$ is the number ...
Quark's user avatar
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3 votes
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Hund's rule & different H₂ molecules

Does Hund's rule allow both of the following scenarios? Filling each orbital with a single electron, so that a sub-shell, at first, only electrons with a negative spin Filling each orbital with a ...
804b18f832fb419fb142's user avatar
27 votes
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What is antisymmetric exchange? What is J-strain? Where does it come from?

I'm reading a paper1 by Sanakis, et al. that characterises the magnetic coupling in the $\ce{Fe3S4}$ clusters present in bacterial ferredoxin II and beef heart aconitase as arising through something ...
Richard Terrett's user avatar
8 votes
4 answers

Is the order of orientation of electron box diagrams meaningful or arbitrary?

Here is my interpretation when asked to: By drawing arrows in the appropriate boxes, complete the outer electron structures for Cu and Cu2+ I had no problem in drawing out the electron structure, ...
Rory's user avatar
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Are there any examples of nuclear spin isomers having consequences for chemical reactivity?

Ortho- and parahydrogen are two forms of the $\ce{H2}$ molecule that are distinguished by their pairing or antipairing of nuclear spins, giving rise to metastable singlet (ortho-) and triplet (para-) ...
Richard Terrett's user avatar

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