4.1.3 Alkene properties

Question 1

are alkenes saturatedor no if not why?

Answer 1

no as they have they dont have all dingle bonds

Question 2

its general formula

Answer 2

CnH2n

Question 3

general formula in a cyclic format

Answer 3

CnH2n

Question 4

types and number of bonds

Answer 4

3 sigma ( 2 C-H and 1 C-C but if on edge then 3 C-H)
1 pi
C forms 4 bonds in total

Question 5

How are pi bonds made

Answer 5

• The other 3/4 C bonds are sigma bonds and now all the C have 1 electon left. these are in the pi orbital
• dungbell shape so e- density is above + below C atoms
• they attach to eachother sideways
• this will prevent the C to rotate around the pi bonds as it locks it in place

Question 6

what is the shape of carbon bond. and why?

Answer 6

trigonal planar
has 3 points of density ( 2 at C-H and one at C-C due to sigma and the pi bond)
the 3 places repel eachother so 120 degrees apart.