Rate and product studies in the solvolyses of N,N-dimethylsulfamoyl and 2-propanesulfonyl chlorides

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作者：

Kevill, DN，Park, BC，Park, KH，D'Souza, MJ，L Yaakoubd，Mlynarski, SL，Kyong, JB

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摘要：

Contrary to earlier suggestions of an SN1 pathway for solvolyses ofN,N-dimethylsulfamoyl chloride (1), an extended Grunwald–Winstein equation treatment of the specific rates of solvolysis in 32 solvents shows an appreciable sensitivity towards changes inbothsolvent nucleophilicity and solvent ionizing power. The actual values are very similar to those obtained in earlier studies of the solvolyses of sulfonyl and phosphoryl chlorides, solvolyses which are believed to proceed by an SN2 pathway. The observation of similar selectivities in aqueous-alcohol solvents further supports this assignment. In a recent report, an addition–elimination (association–dissociation) pathway was proposed for solvolyses of 2-propanesulfonyl chloride (2). A severe multicollinearity problem has been removed by the addition of several specific rates of solvolysis in fluoroalcohol-containing solvents. The new analyses using the extended Grunwald–Winstein equation lead to sensitivities similar to those for1and the previously studied related compounds, and these solvolyses are also best described as following an SN2 pathway.

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关键词：

GRUNWALD-WINSTEIN EQUATION SOLVENT NUCLEOPHILICITY SCALE ALCOHOL-WATER MIXTURES DUAL REACTION CHANNELS STATE VARIATION MODEL TERT-BUTYL CHLORIDE SULFONYL SULFUR 1-ADAMANTYL CHLORIDE SULFAMOYL CHLORIDES ACYL CHLORIDES