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CHY1301 - Fundamentals of inorganic chemistry > Isomerism > Flashcards

Isomerism Flashcards

1
Q

What geometries are possible for a molecule with co-ordination number 4?

A

Square planar

Tetrahedral

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2
Q

What angle is in square planar?

A

90 degrees

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3
Q

What angle is in tetrahedral?

A

109 degrees

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4
Q

What geometries are possible for a molecule with a co-ordination number 5?

A

Trigonal bipyramidal

Square based pyramidal

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5
Q

What is the angle in SBP?

A

90 degrees

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6
Q

What are the angles in TBP?

A

120 and 90 degrees

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7
Q

What geometries are possible for a molecule with a co-ordination number 6?

A

Octahedral

Prismatic

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8
Q

What is the angle in octahedral?

A

90 degrees

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9
Q

What are the angles in prismatic?

A

85 and 95 degrees

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10
Q

What are the two types of ligand?

A

Neutral

Anionic

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11
Q

What are some examples of neutral ligands?

A

H2O
NH3
PPh3

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12
Q

What is used for bonding in neutral ligands?

A

Lone pair

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13
Q

What are some examples of anionic ligands?

A 
F- 
Cl- 
O 2- 
Me-
H-
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14
Q

What is used for bonding in anionic ligands?

A

Negative charge

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15
Q

What is an ambidentate ligand?

A

Ligands that can bind using different atoms and can choose which one they want to bind to

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16
Q

What is an example of a ambidentante ligand?

A

Nitrite (-NO2)

Can bind through either the nitrogen or the oxygen

17
Q

What is a chelate ring?

A

A ring formed using a bidentante ligand

18
Q

What is a bidentate ligand?

A

One ligand that has two binding sites and binds at the same time

19
Q

Why is it better to use one bidentante ligand compared to 2 monodentate ligands?

A

The chelate rings formed are very stable

20
Q

What are the two types of square planar?

A

Cis

Trans

21
Q

What is a cis square planar molecule?

A

The X groups are adjacent

22
Q

What is a trans square planar molecule?

A

The X groups are opposite to each other

23
Q

How many isomers of the tetrahedral geometries are there?

A

1

24
Q

How many isomers for [MX2L4] can you form?

A

2 - one cis and one trans

25
Q

What type of isomers can you form with [MX3L3]?

A

Mer and Fac

26
Q

What is a meridonal isomer for octahedral?

A

The three ligands and the metal are in the same plane

27
Q

What is a facial isomer for octahedral?

A

Three identical ligands occupy one face with the metal not in plane

28
Q

What are enantiomers?

A

Optical isomers which are non-superimposible mirror images

29
Q

Are octahedral molecules with 3 bidentate ligands superimposible?

A

No

30
Q

Are prismatic molecules with 3 bidentate ligands superimposible?

A

Yes

31
Q

Why can’t bidentate ligands occupy trans positions?

A

They cant reach around only occupy 90degree cis arrangements

32
Q

What is ionisation isomerism?

A

When either halide can coordinate

eg. [PtCl(NH3)3]+I- or [PtI(NH3)3]+Cl-

33
Q

What is linkage isomerism?

A

Type of isomerism which occurs due to ambidentate ligands and depends on which donor atom is co-ordinated

CHY1301 - Fundamentals of inorganic chemistry (36 decks)

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