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Question => What is formula for finding Isomers of any stucture. ( CHEMISTRY ) .


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Answer 1

Here is the answer :

In General there is no such formula for finding out no.of isomers, Since the graph of isomers and logarithmic graph of isomers deviates pretty much high !

But the international standards have come up with a solution,

They use recursive Combinatorial Function to find the no.of Isomers ! It is a huge formula by which we can get it ! But if we want to calculate it manually then it takes forever for large compounds !

For example :

10th carbon's form of Alkane has 75 Isomers,

And then it increases rapidly that it reaches 2*10^200..... isomers !

So we can't frame a formula for this !

But if you still need it, Use recursive Combinatorial Function !

Hope you understand, Have a Great day !
Thanking you, Bunti 360 !!

Answer 2

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Determining the number of possible structures for a given range of chemical formulae isn't simple even for saturated hydrocarbons. The number of possible structural isomers rises rapidly with the number of carbons and soon exceeds your ability to enumerate or identify the options by hand. , for example, lists the numbers of isomers and stereoisomers for molecules with up to 120 carbons. But the counts are getting silly even at 10 carbons where there are 75 isomers and 136 stereoisomers.

It has been an interesting research topic in computational chemistry and mathematics. This old paper (pdf), for example, list some formulae for simple hydrocarbons among other simple series. Part of the interest arises because of the relationship to the mathematics of graph theory (it seems that chemistry has inspired some new ideas in this field of mathematics partially because enumerating possible isomers of hydrocarbons is strongly related to drawing certain simple trees which is intuitively obvious if you use the standard chemical convention of drawing just the carbon backbone and ignoring hydrogens).