The synthesis and electrolysis of a series of o-chloro- and o-bromo-phenyl-substituted acids with two to five carbon chain lengths have been studied. The main products, under the experimental conditions used, were the Kolbe dimers. A complete isolation and identification of all of the important by-products is recorded. Methanol and methanol–pyridine were the solvents for electrolysis.This work represents the first study of the behavior of aromatic halogen substituents during the Kolbe electrolysis. In contrast to many reactions involving aliphatic halogen substituents, no free halogen was produced and no products were obtained, even in trace amounts, where halogen had been lost from the aromatic nucleus. During this investigation, 18 previously unreported compounds were synthesized and their properties were determined.
已研究了一系列具有两至五个碳链长度的邻氯和邻溴苯基取代酸的合成和电解。在使用的实验条件下,主要产物是科尔贝二聚体。记录了所有重要副产物的完全分离和鉴定。甲醇和甲醇-吡啶是电解的溶剂。这项工作代表了对芳香族卤素取代基在科尔贝电解过程中行为的首次研究。与许多涉及脂肪族卤素取代基的反应相比,没有产生游离卤素,即使在从芳香族核中失去卤素的情况下,也没有获得任何产品,即使是微量。在这项研究中,合成了18种先前未报道的化合物,并确定了它们的性质。