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Flashcards in Alkenes Deck (14)
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0
Q

Pi bond

A

A double covalent bond.

  • the reactive part of the C=C
  • its former above and below the plane of the 2 C atoms bonded together by the sigma bond.
1
Q

Sigma bond

A

A single covalent bond.

2
Q

Addition reaction

A

A reactant is added to an unsaturated molecule (C=C) to form a saturated bond.

3
Q

Electrophile

A
  • an atom/group that is attracted to an e- rich centre/ e- rich atom
  • it accepts a pair of e- to form a new covalent bond
4
Q

Hydrogenation of ethene

A

Catalyst: Ni
Temperature: 150 C
Pressure: 1atm

5
Q

Hydration of ethene

A

Catalyst: phosphoric acid, H3PO4
Temperature: high
Pressure: high

6
Q

Markovnikov’s rule

A

The H adds on to the C that has the most H’s already bonded to it.

7
Q

Electrophilic addition

A

An addition reaction where an electrophile is attracted to an e- rich centre/atom, & accepts a pair of e- to form a new covalent bond.

8
Q

Carbocation

A

An organic ion in which C has a +ve charge - unstable!

9
Q

Curly arrow

A

A symbol in mechanisms to show movement of a pair of e- in covalent bond making/breaking.

10
Q

Polymer

A

A long molecular chain, built up from monomer units.

11
Q

Monomer

A

A small molecule that combines with many others to form a polymer.

12
Q

Addition polymerisation

A

Unsaturated alkane monomers add onto a growing polymer chain to form an addition polymer.

13
Q

Repeat unit

A

The specific arrangement of atoms occurring again and again in a polymer.