نتایج جستجو برای: octahedral

تعداد نتایج: 3984  

2017
Vadim N. Reutsky Piotr M. Kowalski Yury N. Palyanov Michael Wiedenbeck

Isotopic and trace element variations within single diamond crystals are widely known from both natural stones and synthetic crystals. A number of processes can produce variations in carbon isotope composition and nitrogen abundance in the course of diamond crystallization. Here, we present evidence of carbon and nitrogen fractionation related to the growing surfaces of a diamond. We document t...

Journal: :Romanian Journal of Transport Infrastructure 2017

Journal: :Chemistry 2016
Mark D Johnstone Eike K Schwarze Jennifer Ahrens Dirk Schwarzer Julian J Holstein Birger Dittrich Frederick M Pfeffer Guido H Clever

The synthesis of a centrally functionalized, ribbon-shaped [6]polynorbornane ligand L that self-assembles with Pd(II) cations into a {Pd2 L4 } coordination cage is reported. The shape-persistent {Pd2 L4 } cage contains two axial cationic centers and an array of four equatorial H-bond donors pointing directly towards the center of the cavity. This precisely defined supramolecular environment is ...

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