The Structure of Uracil: A Laser Ablation Rotational Study

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• 作者：Vanesa Vaquero ; M. Eugenia Sanz ; Juan C. L&oacute ; pez ; José ; L. Alonso
• 刊名：Journal of Physical Chemistry A
• 出版年：2007
• 出版时间：May 10, 2007
• 年：2007
• 卷：111
• 期：18
• 页码：3443 - 3445
• 全文大小：72K
• 年卷期：v.111,no.18(May 10, 2007)
• ISSN：1520-5215

文摘

The jet-cooled rotational spectrum of uracil has been investigated using laser ablation molecular beam Fouriertransform microwave (LA-MB-FTMW) spectroscopy. The quadrupole structure originated by the two ¹⁴Nnuclei of uracil has been completely resolved and assigned. This provides a definitive method to establish thepyrrolic or pyrimidinic nature of the N nuclei and allows us to conclude that the observed tautomer of uracilin the gas phase is the diketo form. From the rotational constants of the isotopic species detected, a structureof uracil has been determined.