SCHWEFELDIIMIDE MIT SILYL-, GERMYL-, STANNYL- UND PHOSPHINYL-HETEROSUBSTITUENTEN. SYNTHESE UND NMR-SPEKTROSKOPISCHE CHARAKTERISIERUNG |
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Authors: | Max Herberhold Silke Gerstmann Und Bernd Wrackmeyer |
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Affiliation: | Laboratorium für Anorganische Chemie der Universitat Bayreuth , Postfach 101251, D-8580 , Bayreuth |
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Abstract: | Abstract Reactions of the salts K2SN2 and K[(NSN)R] (R = ′Bu, SiMe3 and P′Bu2) with organoelement chlorides R′R′ěl have been used to prepare four series of model sulfur diimides: R′R″E(NSN)ER″R′, ′Bu(NSN)ER″R′, Me3Si(NSN)E″R′ and tBu2P(NSN)ER″R′, respectively (E = C, Si, Ge, Sn; R′ and R″ = alkyl or aryl group). All compounds have been characterized by ′H and 13C NMR and—if possible—by 31P, 29Si and 119Sn NMR spectroscopy. The configuration (Z or E) of the substituents R and E″R′ has been assigned in several cases using tBu(NSN)tBu (1) as a reference. The E,Z assignment of 1H, 13C and 15N nuclei in 1 is based on selectively 1H-decoupled refocused INEPT 15N NMR and two-dimensional (2D) 13C/1H heteronuclear shift correlations. The sulfur diimides under study are in general fluxional in solution. |
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Keywords: | Sulfur diimides 1H, 13C, 29Si, 31P, 119Sn NMR spectroscopy Z,E configuratiqnal isomerism in sulfur diimides |
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