Chapter 5 Test Flashcards
What is a conjugated alkene?
Single and multiple bonds alternate
What is a cumulated alkene?
Double bonds are adjacent to each other
What is an isolated alkene?
More than one single bond separating the multiple bonds
What is a stereoisomer?
Same attachment of atoms but different arrangement in space. Cis and trans isomers are stereoisomers
How do you find isomers of an alkene?
2^n, n= the number of double bonds in the alkene
Physical properties of alkenes and alkynes
-less dense than water
-nonpolar
-insoluble in water
-have low boiling points with the same trends as alkanes
Alkene Hybridization and bonding: Both carbons of a double bond are…
Sp^2 hybridized
Alkene hybridization and bonding: what two orbitals overlap to form a sigma bond?
Two sp^2 orbitals
Alkene hybridization and bonding: what two orbitals overlap to form a pi bond?
Two p orbitals
Alkene hybridization and bonding: a double bond is formed by…
-sp^2-sp^2 overlap to make 1 sigma bond
-p-p overlap to make 1 pi bond
Does every bond have 1 sigma bond?
Yes
What bond(s) are double bonds made of?
1 pi and 1 sigma bond
Alkyne hybridization and bonding: what hybridization are the carbons of a triple bond?
Sp hybridized
What is formed when two sp orbitals overlap?
Sigma bond formed
What is formed when two pairs of p orbitals overlap?
2 pi bonds
What is a triple bond formed by?
-sp-sp overlap to make 1 sigma bond
-2 p-p overlaps to make 2 pi bonds
