Stereochemical consequences of a parity restriction on dynamic gearing in tris(9-triptycyl)germanium chloride and tris(9-triptycyl)cyclopropenium perchlorate
| Autor: | Yoshio Okamoto, Jeffrey M. Chance, Ryo Aburatani, Kurt Mislow, James H. Geiger |
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| Rok vydání: | 1990 |
| Předmět: |
Steric effects
Tris chemistry.chemical_classification Germanium chloride Stereochemistry General Chemistry Nuclear magnetic resonance spectroscopy Crystal structure Biochemistry Catalysis Crystal Perchlorate chemistry.chemical_compound Crystallography Colloid and Surface Chemistry Polycyclic compound chemistry |
| Zdroj: | Journal of the American Chemical Society. 112:3540-3547 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | Crystal and molecular structures of tris(9-triptycyl)germanium chloride (1) and tris(9-triptycyl)cyclopropenium (2) perchlorate were determined. Crystals of 1 are trigonal, space group R3c (No. 161), with a=b=13.090 (3) A, c=43.58 (1) A, Z=6. Crystals of 2 perchlorate are hexagonal, space group P6 3 /m (No. 176), with a=b=15.145 (5) A, c=13.617 (4) A, Z=2. Both 1 and 2 are located on crystallographic 3-fold rotation axes, with site symmetries C 3 for 1 and C 3h for 2. The same symmetries are maintained in solution at room temperature on the NMR time scale |
| Databáze: | OpenAIRE |
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