Question

How to write the condensed form of a molecular formula in organic chemistry

Answer 1

A molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. An empirical formula gives the simplest, whole-number ratio of atoms in a compound. A structural formula indicates the bonding arrangement of the atoms in the molecule

Answer 2

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Condensed Structural Formula

In other words, we write it down in simply one line listing the atoms in the order which they occupy in the molecule. Moreover, it will also help in showing the functional groups which are present in the molecule.

In other words, the use of amine -NH2, alcohol -OH and parenthesis is done to show that polyatomic groups are part of the same chain. For instance, the condensed structural formula of methane is CH4 and propanol is CH3 (CH2)2OH.

Thus, we can say that in condensed structural formula, every carbon atom is signified individually. Moreover, the following carbon atoms are positioned to the atoms which bond to that specific carbon atom. Similar to a chemical reaction in which the first carbon atom consists of 3 hydrogen atoms bonded, the second carbon atom has 2 hydrogen atoms, the third carbon atom has 3 hydrogen atoms, and fourth carbon atom has 3 hydrogen atoms.

Similarly, another more condensed method of writing structural formula is when there are 2 CH2 groups in the middle of the molecule which have (CH2)2 in the middle of the structural formula.

Formula

In order to avoid any confusion or so, it becomes essential to differentiate between the 3 types of formulas in organic chemistry.

1. Molecular formula (it displays the number of atoms of each element) C5H12O
2. The condensed structural formula (demonstrates all the atoms nonetheless acknowledge vertical bonds plus polyatomic groups are inside parenthesis
3. The structural formula (illustrates all the bonds)

Thus, we see that the condensed structural formula also uses lines between bonded atoms. However, it is a simpler and shorter way to draw the line-bond structural formula as it overlooks the carbon and hydrogen bonds. One can see this when comparing the line-bond structural formula with the condensed structural formula.