Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHY1301 - Fundamentals of inorganic chemistry > Magnetism and Jahn-Teller > Flashcards

Magnetism and Jahn-Teller Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

What are the magnetic spin values of electrons?

A

+1/2

-1/2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What do electrons behave like?

A

Tiny bar magnets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is diamagnetic?

A

All electrons are spin paired

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How do diamagnetic complexes react with a magnetic field?

A

They are repelled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is paramagnetic?

A

Complexes have unpaired electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How do paramagnetic complexes react with a magnetic field?

A

They are attracted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the spin only formula to work out the effective magnetic moment?

A

µ = √n(n+2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the unit for effective magnetic moment?

A

Bohr Magnetons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is n in the equation for effective magnetic moment?

A

Number of unpaired electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the only values n can have in the effective magnetic moment equation?

A

0 to 5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why is measuring effective magnetic moment useful?

A

It can distinguish between high-spin and low spin and help determine co-ordination geometries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

If an equation gives you a value of BM and asks you which ligand it would be, what must you do?

A

Work out what the BM is for high and low spin
Whichever is closer is the right one
Then assign which ligand would be high spin or low spin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is spin crossover?

A

The spin state of complexes can change due to externam stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What can spin crossover be initiated by?

A

Pressure

Temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is paramagnetism?

A

The spins are randomly orientated in the material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is ferromagnetism?

A

The spins are all aligned
Above a certain temperature, the thermal energy is enough to overcome the alignment and normal paramagnetic behaviour prevails

17
Q

What is antiferromagnetism?

A

The spins become aligned anti-parallel which leads to a diamagentic material
They are spin paired

18
Q

What is ferrimagnetism?

A

Some spins are aligned anti-parallel to others but overall there is a finite magnetic moment in one direction

19
Q

What is the Jahn-Teller effect?

A

If a ground-state electronic configuration of a non-linear complex is orbitally degenerate, the complex will distort as to remove the degeneracy and achieve a lower energy

20
Q

What is a tetragonal distortion?

A

2 long bonds

4 short bonds

CHY1301 - Fundamentals of inorganic chemistry (36 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions