The asymmetric unit of the crystal structure of the title compound, [Sn(C~8~H~5~)~4~], consists of one fourth of a discrete tin complex and one half of another which both possess nearly ideal tetrahedral symmetry; the site symmetries of the two Sn atoms are \overline4 and 2. The bond angles at all a
Tetrakis(phenylethynyl)germanium(IV)
✍ Scribed by Churakov, Andrei V. ;Karlov, Sergey S. ;Yakubova, Elmira Kh. ;Selina, Anastasia A. ;Zaitseva, Galina S.
- Publisher
- International Union of Crystallography
- Year
- 2004
- Tongue
- English
- Weight
- 220 KB
- Volume
- 61
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
Single-crystal X-ray study T = 295 K Mean '(C±C) = 0.005 A Ê R factor = 0.028 wR factor = 0.065 Data-to-parameter ratio = 14.2 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
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The title compound, [Sn(C 6 H 3 Cl 2 ) 4 ], crystallizes in the monoclinic space group C2/c, with the molecules having no symmetry. In contrast, its isostere [3,5-(CH 3 ) 2 C 6 H 3 ] 4 Sn, (II), crystallizes in the tetragonal space group P421c.
It is well known that tetrasubstltuted ethylenes show various reaotirities by the nature of their substltuents. For example, tetraoyanoethylene reaats as strong eleotrophile. On the oontrary, tetraalkoxy-and tetraamino-sthylenes be-