The formation of HXeCCH molecules and HXeCC⋅ radicals resulting from chemical reactions in solid xenon-acetylene systems irradiated with fast electrons was studied by low-temperature IR and EPR spectroscopies. The data obtained confirm the assignment of an absorption band with maximum at 1478 cm−1 to the H-Xe stretching vibrations in the HXeCC⋅ radical. Relativistic density functional calculations with inclusion of anharmonic corrections permit a quantitative description of the vibrational spectra of xenon-containing molecules and radicals. Preliminary experimental and computational data on the magnetic resonance parameters of the HXeCC⋅ radical were obtained. This radical is characterized by large hyperfine coupling constants with magnetic nuclei of the xenon isotopes.
通过低温红外光谱和 EPR 光谱研究了在快速电子照射下的固态
氙-
乙炔体系中发生
化学反应而形成的 HXeCCH 分子和 HXeCC⋅ 自由基。获得的数据证实了最大值为 1478 cm-1 的吸收带归属于 HXeCC⋅ 自由基中的 H-Xe 伸展振动。相对论密度泛函计算包含了非谐波修正,可以定量描述含
氙分子和自由基的振动光谱。我们获得了关于 HXeCC⋅ 自由基磁共振参数的初步实验和计算数据。该自由基的特点是与
氙同位素磁核的超细耦合常数较大。