ISSN:
0044-2313
Keywords:
Silylated λ5-Phosphazenes
;
Synthesis
;
NMR spectra
;
Crystal Structures
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Synthesis and Crystal Structures of the Silylated λ5-Phosphazenes R—C(CH2PPh2NSiMe3)3 with R = H and CH3The title compounds are obtained by Staudinger reaction from the corresponding tripodal phosphanes R—C(CH2PPh2)3 and trimethylsilylazide. Both complexes are characterized by their IR and NMR spectra and by crystal structure analyses.H—C(CH2PPh2NSiMe3)3 (1): Space group P21/c, Z = 4, structure determination with 7833 independent reflections, R = 0.055. Lattice dimensions at -50°C: a = 1399.5, b = 2311.4, c = 1678.9 pm, β = 112.92°.CH3—C(CH2PPh2NSiMe3)3 (2): Space group P1, Z = 2, structure determination with 9251 independent reflections, R = 0.057. Lattice dimensions at -50°C: a = 1276.5, b = 1386.9, c = 1790.2 pm; α = 85.55°, β = 69.39°, γ = 62.99°.1 and 2 form monomeric molecules which are distinguished by their conformation.
Notes:
Die Titelverbindungen werden durch Staudinger-Reaktion aus den entsprechenden tripodalen Phosphanen R—C(CH2PPh2)3 und Trimethylsilylazid hergestellt und durch ihre IR- und NMR-Spektren sowie durch Kristallstrukturanalysen charakterisiert.H—C(CH2PPh2NSiMe3)3 (1): Raumgruppe P21/c, Z = 4, Strukturbestimmung mit 7833 unabhängigen Reflexen, R = 0,055. Gitterkonstanten bei -50°C: a = 1399,5; b = 2311,4; c = 1678,9 pm; β = 112,92°.CH3—C(CH2PPh2NSiMe3)3 (2): Raumgruppe P1, Z = 2, Strukturbestimmung mit 9251 unabhängigen Reflexen, R = 0,057. Gitterkonstanten bei -50°C: a = 1276,5; b = 1386,9; c = 1790,2 pm; α = 85,55°; β = 69,39°; γ = 62,99°.1 und 2 bilden monomere Moleküle, die sich durch ihre Konformation unterscheiden.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19976231112
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