硝化作用
化学
聚乙二醇
硝酸
硝酸盐
PEG比率
水溶液
溶剂
无机化学
金属
有机化学
核化学
财务
经济
作者
K. C. Rajanna,V. Sudhakar Chary,M. Satish Kumar,G. Krishnaiah,P. Srinivas,P. Venkanna,M. Venkateswarlu,K. Ramesh,K. Rajendar Reddy,B. Suresh
标识
DOI:10.1080/17518253.2015.1105309
摘要
Ultrasonic and microwave-assisted practical methods have been developed for the nitration of phenols using metal nitrates in aqueous polyethylene glycol (PEG) media. Solvent is recycled three times for reproducibility. It was recycled with minimum loss and decomposition. Developed protocols were cost effective, simple and efficient, which afforded nitration products in good to excellent yields. The observed hyperchromic/hypochromic shifts in the UV/VIS spectra of metal nitrates in PEG solutions could be due to the plausible in situ formation of “PEG-bound M(II) nitrate” and thereby the release of nitronium ion () during the course of reaction when metal nitrate [M(II)nitrate] is added to PEG. Nitronium thus formed most likely is captured by aromatic compound to afforded nitro aromatics.
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