Organolead(IV) polymers [(Me3Pb)4M(CN)6·nH2O] with M=Fe and Ru (0≤n≤2): solid-state NMR and vibrational spectroscopy; crystal structure of the dihydrates
| Autor: | Abdul K. Brimah, Robin K. Harris, R. D. Fischer, Nicola A. Davies, Peter Schwarz |
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| Rok vydání: | 1998 |
| Předmět: |
Chemistry
Organic Chemistry Inorganic chemistry Infrared spectroscopy Nuclear magnetic resonance spectroscopy Crystal structure Biochemistry Inorganic Chemistry NMR spectra database symbols.namesake Crystallography Solid-state nuclear magnetic resonance Materials Chemistry Magic angle spinning symbols Molecule Physical and Theoretical Chemistry Raman spectroscopy |
| Zdroj: | Journal of Organometallic Chemistry. 568:1-12 |
| ISSN: | 0022-328X |
| Popis: | From aqueous solutions of Me 3 PbCl and K 4 [M(CN) 6 ] (4:1; M=Fe or Ru), primarily the diaqua compounds [(Me 3 Pb) 4 M(CN) 6 ·2H 2 O], 4a and 4b , precipitate. These turn out to be not the three-dimensional host-guest systems [{Me 3 Pb(H 2 O) 2 }(Me 3 Pb) 3 M(CN 6 )], but to consist of infinite, puckered layers whose in-built –M–CN–Pb–OH 2 units are likely to form hydrogen bridges between the layers. 4a appears to be sensitive to even very modest influences (including grinding) and tends to lose the coordinated H 2 O molecules partially or totally. This feature is monitored best by both infrared/Raman and CP MAS solid-state NMR spectroscopy. The strictly anhydrous species, 5a and 5b , strongly resemble their earlier-reported Me 3 Sn-homologues in also displaying strongly temperature-dependent 13 C solid-state NMR spectra, but show no ion-exchange activity. The 13 C-, 15 N- and 207 Pb-NMR data in combination yield detailed information about crystallographic sites and intramolecular mobility ol' the Me 3 Pb groups. |
| Databáze: | OpenAIRE |
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