ISSN:
0044-2313
Keywords:
Pentacoordinate silicon
;
zwitterionic λ5Si-spirosilicate
;
29Si-CP/MAS NMR
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Syntheses and Crystal Structure Analyses of New Zwitterionic Spirocyclic (Ammonioorganyl)bis[vic-arenediolato(2-)]silicates: Studies on the Structure of the λ5Si Coordination PolyhedraA new crystallographic modification (1-II) of the zwitterionic λ5Si-spirosilicate [2-(pyrrolidinio)ethyl]bis[3,4,5,6-tetrabromobenzene-1,2-diolato(2 - )]silicate (1) was synthesized. In addition, two solvent-free crystallographic modifications (2-I, 2-II) and two solvates (2 · Me2CO, 2 λ MeNO2) of the zwitterionic λ5Si-spirosilicate [(morpholinio)methyl]bis[2,3-naphthalenediolato(2 - )]silicate (2) were prepared. All new compounds were studied by 29Si-CP/MAS NMR spectroscopy and compounds 1-II (Pna21), 2 · Me2CO (P21/c), and 2 · MeNO2 (P21/n) were structurally characterized by single-crystal X-ray diffraction.
Notes:
Eine neue kristallographische Modifikation (1-II) des zwitterionischen λ5Si-Spirosilicats [2-(Pyrrolidinio)-ethyl]bis[3,4,5,6-tetrabrombenzol-1,2-diolato(2 - )]silicat (1) wurde synthetisiert. Außerdem wurden zwei lösungsmittelfreie kristallographische Modifikationen (2-I, 2-II) und zwei Solvate (2 · Me2CO, 2 · MeNO2) des zwitterionischen λ5Si-Spirosilicats [(Morpholinio)methyl]bis[2,3-naphthalindiolato(2 - )]silicat (2) dargestellt. Alle neu synthetisierten Verbindungen wurden mittels 29Si-CP/MAS-NMR-Spektroskopie untersucht und die Verbindungen 1-II (Pna21), 2 · Me2CO (P21/c) und 2 · MeNO2 (P21/n) mittels Einkristall-Röntgenstrukturanalyse strukturell charakterisiert.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19956210515
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