inorganic chem flash - green (use written notes)

Question 1

What is homolytic fission

Answer 1

homolytic fission is the breaking of a cavalry bond to produce two free radicals. A single headed curly arrow is used. Not useful in synthetic chemistry as complex mixture of products form due to the chain reaction

Question 2

what is heterolytic fission

Answer 2

Normally occurs when polar covalent bonds are broken, the more electronegative atom retains both electrons. A double headed curly are all used as pairs of electrons are moving.

Question 3

Talk about nucleophiles

Answer 3

A nucleophile is attracted to positively charged species i.e. a nucleus. Nucleophiles or negatively charged or neutral molecules that are electron rich or have lunch pairs of electrons. A carbon to carbon double bond is electron rich. Nucleophiles provide electrons for making a new bond.

Question 4

Talk about electrophiles

Answer 4

The electro file is attracted to negatively chargedSpecies, electrophiles are negatively charged or neutral molecules that are electron deficient, they may have a polarised pie bond, or may have an atom that is positive. Electrophiles accept electrons in chemical reactions

Question 5

What are haloalkanes

Answer 5

Haloalkanes are halogen substituted Alkenes, named using bromo, chloro etc.(naming in book)

Question 6

What are different classifications for haloalkanes

Answer 6

In book

Question 7

The more atoms in the conjugated system, the smaller the energy gap between homo and lumo. A lower frequency of light (longer wavelength, lower energy) is absorbed by the compound. When the wavelength of light is absorbed in the visible region, the compound will exhibit the complimentary colour

Answer 7

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Question 8

Molecular orbitals form when atoms combine. The combination of two atomic orbitals results in the formation of a bonding molecular orbital and an antibonding orbital.

Answer 8

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Question 9

The molecular orbital max hold is

Answer 9

2 electrons

Question 10

Pi bonds are weaker than sigma bonds as carbon double bond not twice as strong as carbon single bond

Answer 10

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Question 11

Absorption of electromagnetic energy promotes electrons from homo to lumo

Answer 11

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Question 12

Coloured molecules sometimes due to large gaps between homo and lumo

Answer 12

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Question 13

Chromophore is a group of atoms within a molecule responsible for absorption of light

Answer 13

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Question 14

Light can be absorbed when electrons in a chromophore are promoted from homo to lumo

Answer 14

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Question 15

Chromophores exist in molecules that are conjugated

Answer 15

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Question 16

The more atoms in the conjugated system, the smaller the energy gap between the homo and the lumo, a lower frequency of light (longer wavelength,lower energy) is absorbed by the compound. Complimentary colour emitted,

Answer 16

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Question 17

Chromophore bonds - electrons are delocalised

Answer 17

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Question 18

If chromophore absorbs light of one colour, the complimentary colour is seen

Answer 18

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