Molecular λ5-silicates: Synthesis, structure and properties of zwitterionic λ5-organospirosilicates and λ5-organofluorosilicates
✍ Scribed by Reinhold Tacke; Joachim Becht; Angel Lopez-Mras; Jörg Sperlich
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 635 KB
- Volume
- 446
- Category
- Article
- ISSN
- 0022-328X
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## Abstract The zwitterionic __λ__^5^Si,__λ__^5^Si′‐disilicates 1–8 were synthesized and characterized by solid‐state and solution NMR spectroscopy. In addition, compounds 2⋅6 H~2~O, 3⋅2 CH~3~CN, 4⋅5/2 CH~3~CN, 6⋅CH~3~OH, 7, and 8⋅CH~3~OH⋅CH~3~CN were studied by single‐crystal X‐ray diffraction. Th
From the crude product of the synthesis of the dithiadiphosphetane [RP(S)S], (with R = 2,4,6-iPr3C,H,), the trans-oxathiadiphosphetane RIS)P P(S)R has been isolated, C.,,,H,,OP,S,. X-ray structure analysis and mass spectroscopic investigations give unequivocal evidence for this structure: monoclinic
The syntheses of the zwitterionic (molecular) spirocyclic λ 5 Si-connect the ate and onium center of these zwitterions. Compound 7, 8, and 10-12 were studied by single-crystal X-silicates 7 and 8 (SiO 5 skeletons) and 10-12 (SiO 4 C skeletons) are described. These chiral compounds contain a ray dif