3.3.1 Introduction to Organic Chemistry Flashcards
Define organic chemistry.
Study of compounds containing carbon.
Define molecular formula.
Formula that gives the actual number of atoms of each element in one molecule.
Give an example of a molecular formula.
C4H10, butane.
Define empirical formula.
Formula that gives the simplest whole number ratio of each element in a compound.
Give an example of an empirical formula.
C2H5, butane.
Define structural formula.
This shows the number of atoms joined together in a molecule.
Give an example of a structural formula.
CH3CH2CH2CH3.
Define displayed formula.
This shows all the atoms and bonds in a molecule.
Define functional group.
The atom or group of atoms that is responsible for most of the chemical reactions of a molecule.
Define homologous series.
A family of compounds with the same general formula and the same chemical properties. In a series each member differs by the addition of a CH2 group and there is a gradual change in physical properties.
In a structural formula how do we show branches?
Brackets.
Define skeletal formula.
Uses lines to represent bonds, each point represents a C atom.
What is not usually shown in a skeletal formula? When are they shown?
H atoms and bonds, unless part of a functional group.
What is always shown in a skeletal formula?
Other atoms, eg. O, N, F, Cl, Br, I, S.
Prefix for 1 carbon atoms.
Meth-
Prefix for 2 carbon atoms.
Eth-
Prefix for 3 carbon atoms.
Prop-
Prefix for 4 carbon atoms.
But-
Prefix for 5 carbon atoms.
Pent-
Prefix for 6 carbon atoms.
Hex-