English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

2007-02-24 00:11:27 · 4 answers · asked by PRATYUSHA G 1 in Science & Mathematics Chemistry

4 answers

"Hydrocarbons" is the name given to a collection of families of compounds, each containing just carbon and hydrogen in their molecules. Examples include alkanes, alkenes and alkynes. There are also aromatic hydrocarbons, like benzene and methylbenzene.

2007-02-24 00:17:41 · answer #1 · answered by Gervald F 7 · 0 0

Pure hydrocarbons, i.e. those compounds that contain only carbon and hydrogen, can be classified as follows:

aromatic hydrocarbons, also known as arenes which have at least one aromatic ring
saturated hydrocarbons, also known as alkanes or aliphatic hydrocarbons, don't have any double, triple or aromatic bonds. Their formula is CnH2n+2
unsaturated hydrocarbons have one or more double or triple bonds between carbon atoms. Those with one double bond are called alkenes, with the formula CnH2n (assuming non-cyclic structures). Those with only one triple bond are called alkynes.
The names for the individual hydrocarbons indicates the number of carbon atoms. For example, an alkane which has 7 carbon atoms is called heptane. Hydrocarbons must follow the 4-hydrogen rule which states that all carbon atoms must have the maximum number of hydrogen atoms that it can hold (the limit is four). A carbon atom has a bonding capacity of 4 and therefore must make 4 bonds, whether it be with hydrogen or an adjoining carbon atom. Note, an extra bond removes 2 hydrogen atoms and only saturated hydrocarbons can attain the full four. This is because of the unique positions of the carbon's four electrons.

2007-02-24 08:16:38 · answer #2 · answered by kalyan r 3 · 0 0

Pure hydrocarbons, i.e. those compounds that contain only carbon and hydrogen, can be classified as follows:

aromatic hydrocarbons, also known as arenes which have at least one aromatic ring
saturated hydrocarbons, also known as alkanes or aliphatic hydrocarbons, don't have any double, triple or aromatic bonds. Their formula is CnH2n+2
unsaturated hydrocarbons have one or more double or triple bonds between carbon atoms. Those with one double bond are called alkenes, with the formula CnH2n (assuming non-cyclic structures). Those with only one triple bond are called alkynes.
The names for the individual hydrocarbons indicates the number of carbon atoms. For example, an alkane which has 7 carbon atoms is called heptane. Hydrocarbons must follow the 4-hydrogen rule which states that all carbon atoms must have the maximum number of hydrogen atoms that it can hold (the limit is four). A carbon atom has a bonding capacity of 4 and therefore must make 4 bonds, whether it be with hydrogen or an adjoining carbon atom. Note, an extra bond removes 2 hydrogen atoms and only saturated hydrocarbons can attain the full four. This is because of the unique positions of the carbon's four electrons.

2007-02-24 08:19:53 · answer #3 · answered by Anonymous · 0 1

1. ALIPHATIC hydrocarbons:

..These are: -
..A). Saturated molecules called: - 'ALKANES'.
..B). Unsaturated molecules called 'ALKENES' (or Olefins);
..'ALKYNES' and ALKA-DIENES'

2. CYCLIC hydrocarbons (ring structure).

..These are: -
..A). Saturated molecules called 'CYCLO-ALKANES'
..B). Unsaturated called 'CYCLO-ALKENES', CYCLO-DIENES' and 'AROMATICS'

2007-02-24 11:28:09 · answer #4 · answered by Norrie 7 · 0 0

fedest.com, questions and answers