The reason to covert an alcohol to a tosylate is to: have a good leaving group have a bad leaving group form pyridine stabilize the alcohol Which of the following statements is true in the Pinacol-Pinacolone rearrangement mechanism? A hydride shift on the initial 3 carbocation forms a 2 carbocation, which resonates with oxygen to form a structure which has octet on all atoms (except hydrogen). A hydride shift on the initial 2 carbocation forms a 3 carbocation, which resonates with oxygen to form a structure which has octet on all atoms (except hydrogen). A methyl shift on the initial 2 carbocation forms a 3 carbocation, which resonates with oxygen to form a structure which has octet on all atoms (except hydrogen). A methyl shift on the initial 3 carbocation forms a 2 carbocation, which resonates with oxygen to form a structure which has octet on all atoms (except hydrogen). Ethanoyl chloride (CH3COCl) is reacted with propan-1-ol to form compound A. Which one of the following choices is compound A ? CH3CH2COOCH2CH3CH3COOCH2CH2CH3CH3CH2COOCH3 CH3CH2CH2COOCH3 PCC will oxidize a primary alcohol to: aldehyde no reaction carboxylic acid ketone When but-1-yne is subjected to a hydroboration-oxidation reaction using disiamylborane ( Sia2BH ) followed by H2O2/NaOH, the final product formed will be a: ketone vicinal diol aldehyde geminal diol Acetylene (ethyne) can be deprotonated using the following base: NaOCH3 NaNH2 NH3 NaOH