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Inorganic Chemistry Semester One > Andy Burrows > Flashcards

Andy Burrows Flashcards

1
Q

What are the most common oxidation states of Sc

A

+3

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2
Q

What are the most common oxidation states of Ti

A

+3 & +4

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3
Q

What are the most common oxidation states of V

A

+5
+4
+3

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4
Q

What are the most common oxidation states of Cr

A

+6

+3

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5
Q

What are the most common oxidation states of Mn

A

+7
+3
+2

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6
Q

What are the most common oxidation states of Fe

A

+3

+2

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7
Q

What are the most common oxidation states of Co

A

+3

+2

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8
Q

What are the most common oxidation states of Ni

A

+2

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9
Q

What are the most common oxidation states of Cu

A

+2

+1

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10
Q

What are the most common oxidation states of Zn

A

+2

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11
Q

What structures do MO2 have

A

Rutile

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12
Q

What structures do M2O3 have

A

Corundum

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13
Q

What structures do MO have

A

Rock salt

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14
Q

What structures do M3O4 have

A

Spinel

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15
Q

Why do Ti4+ compounds have high covalent character

A

High charge density on the metal make it very polarisable

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16
Q

How are half equations usually represented

A

As reductions with the higher oxidation state on the left hand side

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17
Q

What is implied by a greater value of E(potential)

A

The greater the strength of the oxidising agent on the left and the weaker the reducing agent on the right

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18
Q

How can you calculate the E (potential) between two points on a frost diagram

A

Gradient of the line between two points

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19
Q

Is disproportionation more or less favourable if the intermediate oxidation state lies below the line linking the higher and lower oxidation states

A

Thermodynamically unfavourable

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20
Q

Is disproportionation more or less favourable if the intermediate oxidation state lies above the line linking the higher and lower oxidation states

A

Thermodynamically favourable

21
Q

How does pH affect oxidation states

A

Greatly

High pH favours higher oxidation states

22
Q

Facts about Sc

A

Colourless
Sc3+ is a strong Lewis acid
Borderline transition metal chemistry

23
Q

Give facts about Ti

A

Strong Lewis acid
Can be reduced to Ti3+
Ti3+ is a good reducing agent

24
Q

What colour is V6+

A

Blue

25
Q

What colour is V3+

A

Green

26
Q

What colour is V2+

A

Violet

27
Q

What shape are most VO^2+ complexes

A

Square pyramidal

28
Q

Why does V2+ need to be handled in an inert atmosphere

A

Strongly reducing and oxidised by air

29
Q

Chromium facts

A

Cr6+ is strongly oxidising
Cr2+ is strongly reducing
Cr3+ is d3 so has a high CFSE therefore kinetically inert
Carboxylate are dimeric and contain Cr-Cr multiple bonding

30
Q

Manganese facts

A

Mn 7+ is a powerful oxidising agent. It exists as a tetrahedral anion. It is intensely coloured due to the L to M charge transfer band
Mn3+ is always a distorted tetrahedral due to the Jain teller effect
Mn2+ are weakly coloured due to the forbidden d to d transition

31
Q

Why is Fe3+ acidic in solution?

A

High charge density on metal increases the lability of the protons

32
Q

Why are compounds between Fe 3+ and Fe2+ strongly coloured

A

M to M charge transfer bands

33
Q

Cobalt facts

A

Cobalt 3+ is a strong oxidising agent
N donor ligands great
Y stabilise Co3+

34
Q

Zinc facts

A

Only important oxidation state is Zn2+
Colourless with a wide range of geometries
Not really a transition metal

35
Q

What symmetry does a 4s orbital have?

A

A1g

36
Q

What symmetry do 4p orbitals have?

A

T1u

37
Q

What symmetry do the d orbitals have (squared)

A

Eg

38
Q

What symmetry do the d orbitals have (unsquared)

A

T2g

39
Q

Do pi donor ligands increase or deserves delta Oct

A

Decrease

40
Q

Do pi acceptor ligands increase or deserves delta Oct

A

Increase

41
Q

What is the role of a metal centre in the electron transfer of proteins?

A

Provide a reversible site for an electron

42
Q

What are cytochromes

A

Iron haem proteins

43
Q

What is the role of cytochrome c

A

Transfer electrons from c1 to cytochrome c oxidase

44
Q

What are oxidises

A

Enzymes that use oxygen as an electron acceptor

45
Q

What ions are hard metals(acids)

A 
Li+
Na+
K+
Mn2+
Al3+
VO^2+
46
Q

What ions are soft metals (acids)

A 
Ti+
Ag+
Cu+
Pb+
Pt+
Pd2+
47
Q

What ions are hard ligands

A 
F-
Cl-
Oh2
OR-
Nh3
48
Q

What ions are soft ligands

A

I-
CN-
SR-
PR3

Inorganic Chemistry Semester One (2 decks)

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