Questions tagged [magnetism]

For questions about determining the paramagnetism, diamagnetism, etc. of chemical species and other chemical applications of magnetism. Note that questions oriented towards physical aspects of electromagnetism are off-topic on this site.

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28
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3answers
8k views

Why isn't the American nickel magnetic?

I never thought that modern American nickels actually contained nickel anymore. However, according to this wiki article, the coins actually do contain 25% nickel, the rest being copper. And yet, no US ...
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1answer
55 views

How could burying a copper and zinc plate underground connected by a surface wire (earth-based Galvanic cell) promote crop growth?

Background: To quote a source: In the 1840s, W. Ross of New York reportedly obtained a severalfold increase in the yield of a field of potatoes when he buried a copper plate (5 ft x 14 ft) in the ...
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2answers
59 views

Effect of magnetization on oxidation (rusting) of iron

Can magenetizing a piece of iron bar slow-down (or speed-up) the oxidation (rusting) process? In other words have any influence on it ? From what I've looked up( wikipedia, quora), it appears that the ...
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1answer
54 views

What is the magnetic moment of tris(oxalato)nickelate(IV)?

I'm really struggling with finding the magnetic moment of this complex: In the solutions, it says that it is 2.83 BM (which corresponds to 2 unpaired electrons). However, in drawing out the d orbital ...
4
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1answer
83 views

Did O₄ turn out to explain why liquid oxygen defied Curie's law? If not, what does?

Wikipedia's Liquid Oxygen says: The tetraoxygen molecule ($\ce{O4}$) was first predicted in 1924 by Gilbert N. Lewis, who proposed it to explain why liquid oxygen defied Curie's law. Modern ...
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2answers
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Why is neodymium the most paramagnetic lanthanide?

My textbook says that paramagnetism rises to a maximum in neodymium. I don't understand how gadolinium has 8 unpaired electrons, whereas neodymium has only 4. Shouldn't paramagnetism be higher in ...
2
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1answer
554 views

Relation in the sign (+/-) for gyromagnetic ratio and magnetic susceptibility

Is there a relation (or formula) between the sign of the magnetic susceptibility and the gyromagnetic ratio of a nucleus in NMR?
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0answers
714 views

Why does Zinc not have magnetic properties despite it being a transition element?

I know Zinc has a full d-orbital which might contribute to the effect. But it is not ferromagnetic or paramagnetic like other transition element complexes. Why is that?
66
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3answers
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Could a magnet pull oxygen out of the air?

I read that the $\ce{O2}$ molecule is paramagnetic, so I'm wondering: could a strong magnet pull the $\ce{O2}$ to one part of a room – enough to cause breathing problems for the organisms in the room? ...
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0answers
46 views

C60 Fullerene Polymers?

Upon scouring Wikipedia for info about fullerenes to research, I came across this paragraph in the page on Buckminsterfullerene (C60): Under high pressure and temperature, repeated [2+2] ...
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0answers
42 views

T1 spin-lattice relaxation times, deviation from exponential relationship

For longitudinal relaxation, one would think that the magnetic moment obeys this simple relationship $$M_z = M_0\left[1 - 2\exp\left(\frac{-t}{T_1}\right)\right].$$ However there is always a point ...
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19 views

Properties of organic magnets

Recently, low-temperature, purely organic (i.e. without any transition metals involved) magnets have been synthesised. After reading related articles, my initial guess was that the molecules in ...
22
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1answer
8k views

What is behind of the attraction between a burned matchstick with a magnet?

I do not know how to understand the reasons of why a burned matchstick is attracted by a magnet (most probably) of Neodymium. Here are some screenshots of a video in which this natural phenomenon is ...
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0answers
379 views

Single-molecule magnet with electrically-controlled permeability: How does the Titan Shield from Deus Ex work?

In a recent installment of Deus Ex game series there is an augmentation called "Titan Shield" (it has nothing to do with $\ce{Ti}$ element): A neodymium skin underlay matrix built of nano-...
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1answer
546 views

Only d orbital electrons for spin only magnetic moment

During my chemistry lessons and self studies, I have come upon many instances where I observed that during calculations of spin only magnetic moment of transition elements only the d orbital electrons ...
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2answers
39 views

Do magnetic fields generated from ion flow through a membrane channel have any physiological relevance?

Membrane pores and transporters see millions of ions flow through them per second. This creates a current and therefore a magnetic field. Do cells have any use for these fields (like maybe drawing ...
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0answers
39 views

Is there any reasonably inert magnetic oxide?

I spent yesterday evening looking for data on magnetic oxides. What is easily available isn't well organized, so I ask here in hope someone can remember. I'm looking for a magnetic oxide (that is, an ...
4
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1answer
1k views

Why does concentration of solutions of alkali metals in liquid ammonia change the magnetic properties?

In "NCERT Chemistry for Class XI - Volume II", in chapter "s-block elements", under the topic "Chemical Properties of alkali metals", it is given: (vi) Solutions in ...
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0answers
62 views

Electron Spin, and the Stern-Gerlach Experiment

I think I understand the basics of the electron spin. However, I'm trying to figure out how to tell if, when shooting a beam of atoms (the Stern-Gerlach experiment), how to tell if an element will ...
2
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1answer
589 views

Magnetic mercury

Well, since I'm not sure, quite simply: Is there a possible way (apart from running a current through in the presence of a perpendicular $\mathbf{B}$ field) to make a small mixture of mercury magnetic ...
4
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1answer
1k views

Growing crystals that are in a magnetic field or subjected to an electric field

I know different crystals resonant at different frequencies but is it possible to grow crystal at a certain frequency. An example would be growing crystals using Epsom salt or Alum in a magnetic ...
0
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1answer
52 views

Maximum metal-metal distance for antiferromagnetic coupling

Imagine a transition metal complex with multiple open-shell transition metal cations. If the metals are relatively close in distance, it is possible that antiferromagnetic coupling will occur between ...
8
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2answers
411 views

How do I solve such questions on paramagnetism and ferromagnetism?

Match the type of magnetism given in Group I with the material given in Group II: $$ \begin{array}{ll|ll} \hline & \textbf{Group I} & & \textbf{Group II} \\ \hline \text{P} & \...
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Why would ferrofluid harden?

I recently decided to make my own ferrofluid toy to play with. I built a sealed enclosure at my local fablab, and the end result was perfect. It worked just like in the videos you see online, and I ...
6
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1answer
3k views

Hybridization, MOT and Paramagnetism

In what way can hybridization or molecular orbital theory be used to explain paramagnetism? For instance, when something is hybridized to make enough bonding electrons, do all the electrons end up ...
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3answers
406 views

Is [Co(NH₃)₄Cl₂]Cl paramagnetic or diamagnetic?

$\ce{NH3}$ is known to be a strong field ligand, while $\ce{Cl}$ is known to be a weak field ligand. Is $\ce{[Co(NH3)4Cl2]Cl}$ a high spin complex or a low spin complex? I assumed this to be a high ...
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0answers
53 views

Why isn't aluminum ferromagnetic?

I know that the ferromagnetism of iron is because of its unpaired d electrons, but I also know that there are other metals with unpaired electrons like aluminum that are not ferromagnetic. Is the ...
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0answers
311 views

Magnetic properties of potassium dichromate

Is $\ce{K_2Cr_2O_7}$ diamagnetic or paramagnetic? While näive theory predicts it's diamagnetic, but we can't be sure. I cannot find any literature on this topic. Nor does Wiki has that information. ...
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117 views

Paramagnetism of group 2 elements

As far as I know, paramagnetism in normal substance arises due to unpaired electrons. I believe that the valence electrons of group 2 elements (Be, Mg, Ca, Sr, Ba) are paired. But, here in the list ...
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28 views

How do hard drives store information using magnetic layering? (Antiferromagnetic/ferromagnetic films)

I am doing some work with solid state materials in some chemistry courses and I've been doing some research into exactly how a hard drive stores information as 1's and 0's. It seems like a bunch of ...
3
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1answer
984 views

Tungsten 4+ ion magnetism?

I just had a quiz and struggled on a particular question: Tungsten forms a $+4$ ion. It is observed to be diamagnetic. The electron configuration for this ion may not be what you would expect. ...
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1answer
303 views

Table for magnetic moments for all elements in periodic table? [closed]

I'm trying to look for a table for magnetic moments for all elements of the periodic table for my research project in computational chemistry, can anyone direct me to a suitable one?
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0answers
1k views

Is cobalt (III) hexaaqua paramagnetic or diamagnetic?

The complex ion $\ce{[Co(H2O)6]^3+}$ has $\ce{Co}$ in the $+3$ oxidation state, meaning it has an electron configuration of $[Ar] 4s^0 3d^6$. Therefore it has 4 unpaired electrons and would be ...
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0answers
118 views

Approximate magnetic susceptibility of these liquid propellants?

This question asks if the comparatively large paramagnetic susceptibility of liquid oxygen (LOX) is considered when designing rocket tank and engine systems. This comment suggests fuels such as RP-1 (...
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0answers
64 views

Is Neodymium Powder Magnetic?

In attempting to make magnetized neodymium (NdFeB) powder, I grinded neodymium magnets into a powderusing a belt sander. However, I found that the magnetic properties of the neodymium had decreased ...
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2answers
5k views

Is NaCl paramagnetic?

My teacher told yes that salt is paramagnetic and it is attracted by magnet slightly. But when I tried that at home it did not work.
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Other than ultracold lithium gas, are any ferromagnetic or magnetic gasses known or hypothesized?

I'm dealing with an interactive work of fiction right now, and one proposal is to combine two types of puzzles with a magnetic gas. I know that fermionic $\ce{^6Li}$, when cooled below $\pu{1 K}$, has ...
0
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1answer
840 views

Is Al2O3 (aluminum oxide) diamagnetic or paramagnetic?

The title about covers it, I am an amateur and I have found that checking 'molecule orbitals' can reveal the answer here but I cannot locate such an orbital. The reason for this question is I am ...
5
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0answers
311 views

What is the magnetic moment of potassium hexacyanochromate(II)?

I calculated the magnetic moment of $\ce{K4[Cr(CN)6]}$? in the following way: $\ce{Cr^{+2}}$ has $4$ d electrons. And since $\ce{CN-}$ is a strong field ligand, the electrons will pair up in the $\...
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1answer
39 views

Help understanding the equation for Spin Energy in Zero Field

I’m working with a system that experiences spin frustration and for me this is the first time dealing with such a phenomenon. To grasp the concept, I’ve decided to go to the basics and read the ...
2
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1answer
62 views

Magnetic couplings using DFT in a spin frustrated system

I’m working with a trimeric copper system that have the classic triangular shape and experiences spin frustration. This is my first time dealing with such system and, so far, from what I’m reading, I ...
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1answer
101 views

Help understanding external magnetic field sensitivity of radical pair reaction rate

Two recent papers have been published on magnetoreception in birds. In this case it is the ability of the birds to sense the direction of the Earth's magnetic field potentially for navigation. ...
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1answer
102 views

Van der Waals interaction and magnetic dipole dipole interaction

I have a conceptual question that bothers me. From what I understand, van der Waals forces are the primary source of inter-molecular interaction. There are three different possible origins for van ...
5
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2answers
14k views

Why is diboron (B2) paramagnetic?

Why is $\ce{B2}$ paramagnetic? It's just 2 borons with a triple bond between them. Aren't all the electrons paired?
3
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1answer
1k views

Does pyrite retain the magnetic properties of its element iron?

You are walking in the mountains and pick up what looks like a nugget of gold. You're aware that fools gold (iron pyrite, $\ce{FeS2}$) exists. Create an experiment to test if this is pure gold or iron ...
4
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1answer
909 views

Is Co[Hg(SCN)4] diamagnetic?

I was reading a book and it was mentioned that $\ce{Co[Hg(SCN)4]}$ is diamagnetic. I know that it is made up of $\ce{Hg^2+}$ and $\ce{Co^2+}$. $\ce{Co^2+}$ has 7 electrons which means that it should ...
2
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1answer
347 views

Jahn Teller distortion and magnetic moments.

It is relatively well known that the discrepancy between the observed and experimental magnetic moments in the first row transition metals is attributed to spin-orbit coupling when it comes to metal ...
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1answer
237 views

Coordination compounds

Which of the following complex is diamagnetic? $\ce{[Cr(Cl3)(NMe3)]}$ $\ce{[Co(EDTA)]-}$ $\ce{[Cu(CN)(NO2)(NH3)(Py)]}$ $\ce{[Fe(NH3)6]^2+}$ For (4) I found that since $\ce{NH3}$ ...
5
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1answer
2k views

By using the magnetic susceptibility, calculate the number of unpaired elections in the complex

I'm having trouble making sense of this answer. I believe I am doing all the steps right, but my main concern is that I am not arriving at a whole number. If my answer is correct, should I just round ...
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2answers
3k views

Is [PdCl2(PMe3)2] diamagnetic or paramagnetic?

Please tell me where I am wrong. The complex will have $\ce{Pd^{2+}}$ ion, which has a $\mathrm{d^8}$ configuration. So, it will have $2$ unpaired electrons. Unpaired electrons will mean that it is ...