Raman studies of cyanate: Fermi resonance, hydration and hydrolysis to urea
Raman studies of cyanate: Fermi resonance, hydration and hydrolysis to urea
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氰酸盐的拉曼研究：费米共振、水合和水解成尿素
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
N. Wen
中科院分区：
文献类型：
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作者：
M. H. Brooker;N. Wen
对固相氰酸钾以及新制备的 H2O 和 D2O 中的水溶液和陈化溶液的氰酸钾的拉曼光谱进行了测量。结果表明，固体氰酸钾的费米双峰ν1 和2ν2 的分配与水溶液的分配相反。费米双峰在 1191 和 1315 cm−1 处有一对相关的热带，它们源自 638 cm−1 ν2 态 010。通过在液氮温度、室温和 473 K 下对固体氰酸钾的研究证实了热带的归属。老化氰酸钾水溶液的拉曼光谱表明，氰酸根离子缓慢且自发地水解 在室温下（即使不添加铵）平行反应生成尿素和氨基甲酸盐、碳酸盐平衡混合物。氰酸盐在氯化铵水溶液中水解导致氰酸盐几乎完全转化为尿素。该反应在环境条件下是不可逆的。差异在...
Raman spectra were measured for potassium cyanate in the solid phase and as aqueous solutions in H2O and D2O for freshly prepared and for aged solutions. The results indicated that the assignment of the Fermi doublet, ν1 and 2ν2, for solid potassium cyanate was reversed from the assignment for the aqueous solution. The Fermi doublet has an associated pair of hot bands at 1191 and 1315 cm−1 which originate from the 638 cm−1 ν2 state, 010. Assignment of the hot bands was confirmed by studies of solid potassium cyanate at liquid-N2 temperature, room temperature, and at 473 K. Raman spectra of aged aqueous potassium cyanate revealed that the cyanate ion hydrolyzed slowly and spontaneously at room temperature (even without added ammonium) to produce urea and a carbamate, carbonate equilibrium mixture in parallel reactions. Hydrolysis of cyanate in aqueous ammonium chloride solution resulted in almost total conversion of cyanate to urea. The reaction was not reversible under ambient conditions. Differences in p...