Consider the following two molecules and their IUPAC names
Spiro [x.y] hexane
Bicyclo [a.b.c] heptane
Find the value of a + b – c + y – x
x = 2 a = b = 2 y = 3 c = 1 a + b – c + y – x = 2 + 2 – 1 + 3 – 2 = 4