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Updated: Feb 16, 2026

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
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Published on: March 4, 2021

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スーパーフェニルフォスフィン: 協調幾何学を制御し,超分子組立を駆動するナノゲンベースのリガンド

Jordan N Smith1, James M Hook2, Nigel T Lucas1

  • 1MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Chemistry, University of Otago , Union Place, Dunedin 9016, New Zealand.

Journal of the American Chemical Society
|December 19, 2017
PubMed
まとめ

新しいスーパーフェニルフォスフィンは,ヘクサペリヘクサベンゾコロネン (HBC) 置換剤でユニークなパラジウム複合体を形成します. これらの複合体は,広範囲のpi-stacking相互作用により興味深い構造および光物理的性質を示している.

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Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
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In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
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