How many pi and sigma bonds are in caffeine?
1 Answer
Feb 21, 2016
Caffeine has the following structure:
Suppose the molecule only had single bonds. That is, suppose we drew the skeletal structure, with no double bonds whatsoever. We can count each single bond in that case as one
That means there are these
#"N"-"C"# (3;#"N"-"CH"_3# connection)#"C"-"N"# (8; all in the rings)#"C"-"O"# (2)#"C"-"C"# (2)#"C"-"H"# (10, from each#"CH"_3# and one#"C"-"H"# between the#"N"-"C"="N"# )
That's
And now we count each double bond as having one
The number of
#"C"="O"# (2)#"C"="C"# (1)#"C"="N"# (1)
That's
Hence, there are
