Reactivity and electronic structure Flashcards

1
Q

valence e-

A

number of electrons

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2
Q

electronic structure of H

A

wants 2 e- around nucleus to be stable

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3
Q

electronic structure of C, N, O, F

A

wants 8 e- around nucleus

also P, S, Br, I

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4
Q

example of electronic structure - methane

A

C shares with H atoms therefore valence shell for C if full when sharing e-

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5
Q

finding e- pairs

A

work from given chemical structure
find e- and deduce possible charges
has the octet rule

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6
Q

radicals

A

does not fulfil octet rule

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7
Q

highly reactive radicals

A

does not fulfil octet group

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8
Q

electronegativity function

A

predict e- distribution (polarisation)

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9
Q

resonance structure arrangement

A

arrangement remains same but e- distribution is different

sigma bond is also same

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10
Q

resonance structure

A

when molecule is represented by 2/more hybrid structure

different in position of e- only

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11
Q

making resonance function

A
  • put all lone pairs and formal charges
  • moving e- where pi e- in double bond in lone pair
  • don’t make 5 bonded atom - including lone pair
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12
Q

curly arrows

A

movement of e- pair from chemical bond - bond broken

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13
Q

curly arrows falling between atoms

A

chemical bond formed

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14
Q

if e- falls on atom

A

lone pair created

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15
Q

importance of curly arrows / resonance structure

A

shows stability of molecules/ reactivity of molecular structure

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16
Q

2 types of reactions

A

intermolecular

intramolecular

17
Q

intermolecular reaction

A

2 different molecules - 2 reaction function that are present

18
Q

intramolecular reaction

A

reaction present in the same molecules

19
Q

nucleophile

A

source of e-

e- donor

20
Q

electrophile

A

functional group/atom that receive e-

21
Q

reactivity for resonance form

A

water act as proton shuttle and enhance reactivity in biological system

22
Q

reactivity for resonance form equation

A

H2O + H+ H3O+