Various inorganic selenium-based compounds were analysed by (77)Se solid-state NMR, and a distinct difference in chemical shift ranges for compounds where selenium is present as selenide (Se(2-)) ionically and covalently bonded systems was observed. The selenides exhibit a shift range of approximately -700 to -100ppm, as opposed to 700 to 1600ppm for the compounds where there tends to be more direct covalent bonding to the selenium. The anisotropic hyperfine shift observed in NbSe(2) is shown to be axially symmetric, where the H(11) component is found to be normal to the Se3-trigonal plane.

中文翻译：

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无机化合物的自然丰度（77）Se固态NMR研究。

通过（77）Se固态NMR分析了各种基于无机硒的化合物，观察到硒作为硒化物（Se（2-））的离子和共价键系统存在的化合物的化学位移范围存在明显差异。硒化物的位移范围约为-700至-100ppm，而化合物的硒的位移范围为700至1600ppm，在硒化物中，共价键往往更直接地键合。NbSe（2）中观察到的各向异性超精细位移被证明是轴向对称的，其中发现H（11）分量垂直于Se3三角平面。