00:01
Dear students, we have to calculate the index of hydrogen deficiency for this molecule alpha santonin.
00:07
Now this is a ring type complex molecule.
00:11
Before going to calculate, let us understand what is index of hydrogen deficiency.
00:17
Now it is equal to the number of hydrogen molecules, number of hydrogen molecules need to be added to a structure in order to obtain the saturated acyclic structure.
00:52
Saturated acyclic species.
00:56
So from a unsaturated ring type compound like this, by adding how many hydrogen molecules we can get a saturated and open type structure or acyclic structure we can get, that is that number is known as index of hydrogen deficiency.
01:11
That means in simple language, it is the count of how many multiple bonds, how many multiple bonds and rings are present in a structure.
01:42
Now for doing this, let us see here.
01:45
Let us calculate the index of hydrogen deficiency of this molecule.
01:49
Now for this what you have to do is we have to count the number of pi bonds.
01:53
Here we have one pi, here one pi and here one pi and here one pi.
01:58
So here we are having four pi bonds.
02:01
And as for the rule, for each pi bond we need two hydrogen atoms or one hydrogen molecule...