For 10 points, name this concerted substitution reaction mechanism which uses two species in its rate limiting step
The most common way to form Carbon-Phosphorus bonds utilizes this specific type of reaction with tri-alkyl-phosphites as the phosphorus source. The less electronegative atom in certain ambident species reacts under this type of reaction according to Kornblum's rule. In addition to the Arbuzov reaction, alkali metal and alkyl halides trade halides in another reaction of this type, the Finkelstein reaction. This reaction notably fails when using primary (*) neopentyl groups due to steric hindrance. An organohalide reacting with an alkoxide in the Williamson ether synthesis exemplifies this type of reaction. This reaction's mechanism involves a Walden inversion of stereochemistry after the backside attack of an electrophile. For 10 points, name this concerted substitution reaction mechanism which uses two species in its rate limiting step
The most common way to form Carbon-Phosphorus bonds utilizes this specific type of reaction with tri-alkyl-phosphites as the phosphorus source.
SN2 reaction [accept bimolecular nucleophilic substitution before mentioned; prompt on just nucleophilic substitution]