`star` `color{green}("Complete, Condensed ")` `color{green}("and Bond-line Structural Formulas")`
The Lewis structure or dot structure, dash structure, condensed structure and bond line structural formulas are some of the specific types. The Lewis structures, however, can be simplified by representing the two-electron covalent bond by a dash (-).A single dash represents a single bond, double dash is used for double bond and a triple dash represents triple bond. Lone pairs of electrons on heteroatoms (e.g., oxygen, nitrogen, sulphur, halogens etc.) may or may not be shown. Thus, ethane `color{red}((C_2H_6))`, ethene `color{red}((C_2H_4))`, ethyne `color{red}((C_2H_2))` and methanol `color{red}((CH_3OH))` can be represented by the following structural formulas. Such structural representations are called `color{red}("complete structural formulas.")`
We can also use `color{red}("condensed structural formula")` by omitting some or all of the dashes representing covalent bonds and by indicating the number of identical groups attached to an atom by a subscript.
In bond-line structural representation of organic compounds, carbon and hydrogen atoms are not shown and the lines representing carbon-carbon bonds are drawn in a zig-zag fashion. The only atoms specifically written are oxygen, chlorine, nitrogen etc. The terminals denote methyl `color{red}((–CH_3))` groups (unless indicated otherwise by a functional group), while the line junctions denote carbon atoms bonded to appropriate number of hydrogens required to satisfy the valency of the carbon atoms. Some of the examples are represented as follows:
(i) 3-Methyloctane can be represented in various forms as:
(ii) Various ways of representing 2-bromo butane are:
In cyclic compounds, the bond-line formulas may be given as follows:
`star` `color{green}("Three-Dimensional Representation of Organic Molecules")`
`star` The three-dimensional `color{red}((3-D))` structure of organic molecules can be represented on paper by using certain conventions. For example, by using solid
and dashed
wedge formula, the `color{red}(3-D)` image of a molecule from a two-dimensional picture can be perceived.
`star` Solid-wedge is used to indicate a bond projecting out of the plane of paper, towards the observer. The dashed-wedge is used to depict the bond projecting out of the plane of the paper and away from the observer.
`star` `color{green}("Complete, Condensed ")` `color{green}("and Bond-line Structural Formulas")`
The Lewis structure or dot structure, dash structure, condensed structure and bond line structural formulas are some of the specific types. The Lewis structures, however, can be simplified by representing the two-electron covalent bond by a dash (-).A single dash represents a single bond, double dash is used for double bond and a triple dash represents triple bond. Lone pairs of electrons on heteroatoms (e.g., oxygen, nitrogen, sulphur, halogens etc.) may or may not be shown. Thus, ethane `color{red}((C_2H_6))`, ethene `color{red}((C_2H_4))`, ethyne `color{red}((C_2H_2))` and methanol `color{red}((CH_3OH))` can be represented by the following structural formulas. Such structural representations are called `color{red}("complete structural formulas.")`
We can also use `color{red}("condensed structural formula")` by omitting some or all of the dashes representing covalent bonds and by indicating the number of identical groups attached to an atom by a subscript.
In bond-line structural representation of organic compounds, carbon and hydrogen atoms are not shown and the lines representing carbon-carbon bonds are drawn in a zig-zag fashion. The only atoms specifically written are oxygen, chlorine, nitrogen etc. The terminals denote methyl `color{red}((–CH_3))` groups (unless indicated otherwise by a functional group), while the line junctions denote carbon atoms bonded to appropriate number of hydrogens required to satisfy the valency of the carbon atoms. Some of the examples are represented as follows:
(i) 3-Methyloctane can be represented in various forms as:
(ii) Various ways of representing 2-bromo butane are:
In cyclic compounds, the bond-line formulas may be given as follows:
`star` `color{green}("Three-Dimensional Representation of Organic Molecules")`
`star` The three-dimensional `color{red}((3-D))` structure of organic molecules can be represented on paper by using certain conventions. For example, by using solid
and dashed
wedge formula, the `color{red}(3-D)` image of a molecule from a two-dimensional picture can be perceived.
`star` Solid-wedge is used to indicate a bond projecting out of the plane of paper, towards the observer. The dashed-wedge is used to depict the bond projecting out of the plane of the paper and away from the observer.