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ChemInform Abstract: Nonaromatic Planar Si12 Ring System of Approximate D6h Symmetry in Ca7Mg7.5.+-.δSi14.

✍ Scribed by Reinhard Nesper; Antonio Currao; Steffen Wengert

Publisher: John Wiley and Sons
Year: 2010
Weight: 34 KB
Volume: 30
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199905005

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✦ Synopsis

Ring System of Approximate D 6h Symmetry in Ca 7 Mg 7.5±δ Si 14 .

-The title compound is an unusual Zintl phase with metallic conductivity that is expected to be highly anisotropic. Powder XRD shows a hexagonal structure (space group P6/mmm, Z = 1) that contains planar hexasilyl-hexasilacyclohexene anions, [Si 12 ] -(21±2δ) of D 6h symmetry besides isolated Si 4 4-anions. The planar ring system does not show aromacity, but contains approximately 1.75 double bonds that are equally delocalized.

📜 SIMILAR VOLUMES

Nonaromatic Planar Si12 Ring System of A

Nonaromatic Planar Si12 Ring System of Approximate D6h Symmetry in Ca7Mg7.5±δSi14

✍ Reinhard Nesper; Antonio Currao; Steffen Wengert 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 310 KB

Ca 7 Mg 7.5AEd Si 14 is the correct stoichiometry of the so called Ca 7 Mg 6 Si 14 of Gladishevskii et al. [1] Ca 7 Mg 7.5AEd Si 14 is an approximate or unusual Zintl phase with metallic conductivity that is expected to be highly anisotropic. The crystal structure (P6/mmm (no. 191), a 12.696(2), c 4