1 and 2 Alcohols:best to use SOC12,PBr3,or P/2 All are Sy2 Reactions S0C12 pyridine OH PBr3 P,I2 (in situ prep. ofPI3) 1 o and 2o Alcohols: best to use SOCl2 , PBr3 , or P/I2 OH SOC l2 pyridine PBr3 Br Cl P, I 2 I (in situ prep. of PI 3) All are SN2 Reactions