Unit 2- Hydrocarbons Flashcards
Name a subset of hydrocarbons
Alkanes
What is a homologous series?
A set of compounds with the same general formula and similar chemical properties
How can you identify an alkane by looking at its name?
The -ane ending
What is the general formula for alkanes?
CnH2n+2
How many carbons are in meth-
1
How many carbons are in prop-
3
How many carbons are in pent-
5
How many carbons are in hept-
7
How many carbons are in non-
9
How many carbons are in dec-
10
How many carbons are in eth-
2
How many carbons are in oct-
8
How many carbons are in but-
4
How many carbons are in hex-
6
How can straight chain alkanes be named?
From their molecular formula, shortened and full structural formulae
What is the molecular formula for methane?
CH4
What is the shortened formula for pentane?
CH3, CH2, CH2, CH2, CH3
What I the molecular formula for propane?
C3H8
What is the shortened formula for propane?
CH3, CH2, CH3
What is the molecular formula for pentane?
C5H12
What is the shortened structural formula for methane?
CH4
What is the molecular formula for ethane?
C2H6
What is the shortened structural formula for butane?
CH3, CH2, CH2, CH3
What is the molecular formula for butane?
C4H10
What is the shortened structural formula for ethane?
CH3, CH3
How are the branches of branched chain alkanes named?
They are named after the corresponding alkanes with the ‘-ane’ ending changed to ‘-yl’
Give an example of a branch name
Methly Ethyl Propyl Butly Pently
How do you name a branched chain alkane?
- Select the longest, continuous chain of carbon atoms an name it after the appropriate alkane
- number the carbon atoms from the end of the chain nearer the branch
- name the branches and indicate the position of the branches on the chain
What are alkenes?
A subset of compounds called hydrocarbons
What makes an alkene different from an alkane?
It has a double bond
What is the alkene general formula?
CnH2n
What are cycloalkanes?
A subset of compounds called hydrocarbons
What is the cycloalkanes general formula?
CnH2n