FUNCHEM 13 Cycloalkanes

What is the general formula for Cycloalkanes

CnH2n

IUPAC Cycloalkane Nomenclature

1. Place the prefix cyclo– before the name of the straight chain alkane that has the same number of carbon atoms as there are in the ring

2. No number is needed before a substituent when there is only one attached to the ring

3. Number substituents around the ring in whichever direction gives them the lowest numbers

What are the factors that affect Cycloalkane stability

Angle strain- The strain due to expansion and compression of bond angles

Torsional strain-The strain due to the eclipsing of bonds on neighboring atoms

Steric strain-The strain due to the repulsive interactions when atoms approach each other too closely

What are the two conformations of cyclohexane

Chair conformation and boat conformation

what does cis and trans mean

cis- same side

trans-opposite side