Question

how many stereoisomers are possible for farnesene?

Answer 1

wThe alpha form can exist as four stereoisomers that differ about the geometry of two of its three internal double bonds (the stereoisomers of the third internal double bond are identical). The beta isomer exists as two stereoisomers about the geometry of its central double bond.
Chemical formula: C15H24
Density: 0.813 g/mL
Boiling point: α-(Z): 125 at 12 mmHg (1.6 kPa); β-(E): 124 °C; β-(Z): 95-107 at 3 mmHg ...