电子过渡

Finally, the development trend on Mg-based transition-metal complex hydrides Mg2NiH4, Mg2CoH5 and Mg2FeH6 in the future is prospected.

最后展望了对于具有18电子结构的镁基过渡金属氢化物在今后研究中的发展方向。

The bonds of early transition metal monoxides are stronger than those of later transition metal monoxides.

这也说明了对于d轨道未半满的早周期过渡金属来说，d电子易于参与成键生成高氧化价态分子。

According to molecular orbital theory, the main bonding orbitals of 3d transitionmetal monoxides MO are 9σ, 1δand 4πmolecular orbitals.

过渡金属氧化物与稀有气体原子间除了静电相互作用以外，通常还包含路易斯酸碱相互作用，即稀有气体原子作为路易斯碱可以提供电子给金属氧化物中基于金属中心的空的或部分占据的分子轨道。

Some principles were preposed which should be followed in the production of various color decorative cement.

本文利用晶体场理论解释了所得到的掺杂硅酸钙的光学吸收光谱和电子顺磁共振谱，并由此半定量地计算了对装饰水泥的颜色特性有较大影响的五个过渡金属元素铬、锰、铁、钴、镍在硅酸钙中的晶体场参数，确定了它们的价态，配位状态和置换方式，提出了生产不同颜色的装饰水泥所应遵循的一些原则。

At low laser field limit, these results are consistent with that obtained from the traditional non-harmonic oscillator model, nay, the corresponding characteristic frequency of oscillator and the nonlinear coefficient can be found self-consistently from the presented model.

在低场近似下，这些结果可自洽地过渡到传统的非简谐振子模型，并可得到对应的谐振子的固有频率和非线性系数。标签强激光场部分离化等离子体束缚电子非线性极化 Intense laser field Partially stripped plasmas Bound electron Nonlinear polarization

Ionization Potentials and electron affinities of 103 elements are calculated by density functional theory at local density approximation level and the LDA/AN level with further non- local corrections for exchange and correlation included self- consistently.

应用密度泛函理论的 DFT- LDA、 DFT- LDA/NL和改进的 Slater过渡态方法，把元素的电离能和电子亲合能的计算扩展到周期表的 103种元素。

Electron paramagnetic resonance spectrum is an effective tool to investigate the optical and magnetic properties of crystals and complexes doped with transition-metal and rare-earth ions.

电子顺磁共振谱是研究掺过渡和稀土金属离子晶体及络合物的微观结构、光学和磁学性质等的有力工具。

The facts influencing the high stereoselectivity were discussed. It is proposed that the stability of the tri- molecular transition state or the stereoelectronic effect of the vinyl anion intermediate formed by the nucleophilic addition of halide anion to the electron-deficient carbon- carbon triple bond might be responsible for the high Z-stereoselectivity.

通过对影响反应的高立体选择性因素的研究，认为反应的三分子过渡态的稳定性或生成的烯基负离子中间体的立体电子效应决定了反应的高度Z立体选择性。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失