Stamou Christina, Perlepes Spyros P, Sigalas Michail M, Papaioannou Dionissios, Tsipis Athanassios C, Bakalbassis Evangelos G
Department of Chemistry, University of Patras, Patras 26504, Greece.
Department of Materials Science, University of Patras, Patras 26504, Greece.
J Org Chem. 2024 Oct 4;89(19):13894-13912. doi: 10.1021/acs.joc.4c00942. Epub 2024 Sep 20.
Incorporation of chlorides in coordination complexes, prepared by reactions in CHCl, stimulated MP2 and DFT studies of its complete hydrolysis mechanisms. In excellent agreement with previous experimental results, the most important mechanism for CHCl basic hydrolysis at room temperature is the radical one producing :CCl. The latter inserts into the H-O bond of HO yielding dichloromethanol (). The hydrolysis mechanism of α-H-lacking PhCCl to the corresponding dichloro(phenyl)methanol () was also studied. decomposes by HO to formyl chloride () and HCl. , following a variety of pathways, leads to known CHCl hydrolysis products, such as CO () and formic acid (), via the intermediates chloromethanediol (), , -dihydroxycarbene (-), and -, --dihydroxycarbene (). Interestingly, both - and intermediates have recently been implicated in the reduction of CO with H to . The conversion of CO to HCOOH was studied. Most of the reactions studied are asynchronous concerted processes, the radical mechanism being a multistep one. The synthetic utility of this mechanism is briefly mentioned. To avoid chloride ions when performing reactions in CHCl, we should use the solvent at room temperature even in the presence of water. This has been verified further by coordination chemistry reactions in progress.
在通过在CHCl₃中反应制备的配位络合物中引入氯化物,激发了对其完全水解机理的MP2和DFT研究。与先前的实验结果高度一致,室温下CHCl₃碱性水解的最重要机理是产生:CCl₃的自由基机理。后者插入HO的H-O键中生成二氯甲醇()。还研究了缺乏α-H的PhCCl₃水解为相应的二氯(苯基)甲醇()的机理。()通过HO分解生成甲酰氯()和HCl。()通过多种途径,经由中间体氯甲烷二醇()、()、-二羟基卡宾(-)和-,--二羟基卡宾(),生成已知的CHCl₃水解产物,如CO()和甲酸()。有趣的是,最近发现-和中间体都参与了用H将CO还原为()的过程。研究了CO转化为HCOOH的过程。所研究的大多数反应都是异步协同过程,自由基机理是多步过程。简要提及了该机理的合成效用。为了在CHCl₃中进行反应时避免氯离子,即使在有水存在的情况下,我们也应在室温下使用该溶剂。正在进行的配位化学反应进一步证实了这一点。