Alternativ-Liganden. XXV. Neue Chelatliganden des Typs Me2ESiMe2(CH2)2E′Me2 (E=P,As; E′=N,P, As) |
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Authors: | J Grobe S Gbelbecker D Syndikus |
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Institution: | J. Grobe,S. Göbelbecker,D. Syndikus |
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Abstract: | Alternative Ligands. XXV. New Chelating Ligands of the Type Me2ESiMe2(CH2)2E′Me2 (E=P, As; E′=N, P, As) Chelating ligands of the type Me2EsiMe2(CH2)2E′ Me2, have been prepared by the following routes: Starting from Me2Si(Vi)Cl, the compounds with E=N and E′ =N ( 1 ), P ( 2 ), As ( 3 ) are obtained in yields of 65 to 78% by aminolysis to yield Me2NSiMe2Vi, followed by the LiE′ Me2 catalyzed addition of He′Me2 to the vinyl group. The intermediates ClSiMe2(CH2)E′Me2 E′=N ( 4 ), P ( 5 ), As ( 6 )] are produced by the reactions of 1 to 3 with PhPCl2. 5 and 6 can be prepared in a purer form by the photochemical addition of HPMe2 and HAsMe2, respectively, to the vinyl group of Me2Si(Vo)Cl. 4 to 6 react with LiEMe2, in situ prepared from n-BuLi and HEMe2, to yield the ligands Me2ESiMe2(CH2)2E′Me2 ( 7–12 ) (E=P, As; E′=N, P, As). The new compounds have been characterized by analytical and spectroscopic investigations (NMR, MS). |
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Keywords: | Chelating ligands N P As donor groups |
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