The Kinetics and Mechanism of Nucleophilic Addition of Mercaptan to -Nitrostyrene in Acid Media Part . The Reactions of n-Amyl, n-Hexyl, n-Octyl, and n-Decyl Mercaptan with -Nitrostyrene

[摘要] The nucleophilic addition rate constants of n-amyl-, n-hexyl-, n-octyl-and n-decyl mercaptide ion to 3,4-methylenedioxy-¥â-nitrostyrene were determined and found to be 2.82 ¡¿ 108 M-2¡¤sec-1, 1.00 ¡¿ 108 M-2¡¤sec-1, 2.23 ¡¿ 108 M-2¡¤sec-1 and 1.77 ¡¿ 108 M-2¡¤sec-1, respectively. At low pH, for n-amyl-, n-hexyl-, n-octyl-and n-decyl mercaptan the values determined are 2.82 ¡¿ 10-2 M-1¡¤sec-1, 1.95 ¡¿ 10-2 M-1¡¤sec-1, 7.08 ¡¿ 10-2 M-1¡¤sec-1 and 5.63 ¡¿ 10-2 M-1¡¤sec-1 respectively. The rate equations which can fully explain the addition mechanism over wide pH range were also be obtained.

[学科分类] 化学（综合）