In search for a pentacoordinated monoorgano stannyl cationстатья
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Аннотация:Alkylation of Sn(OCH(2)CH(2)NMe(2))(2) (1) by MeI or MeOTf leads to a mixture of quaternary ammonium salts by alkylation of the NMe(2) moiety. Reaction of Sn(acac)(2) (2) with MeOTf gives unexpected redistribution product Sn(acac)OTf (3), which is a rare example of mono acetylacetonato tin (II) derivatives. Pentacoordinated monoorgano stannyl cation PhSn(OCH(2)CH(2)NMe(2))(2)(+) was generated by salt metathesis from PhSn(OCH(2)CH(2)NMe(2))(2)Cl (5) and Ag[Al(OCH(CF(3))(2))(4)] or Ag[B(C(6)F(5))(4)]. This cation was not isolated due to its strong electrophilic nature. It abstracts substituents from aluminate and borate weakly coordinating anions (WCAs) leading to redistribution products [Al[OCH(CF(3))(2)](2)OCH(2)CH(2)NMe(2)](2) (6) and [Ph(C(6)F(5))Sn(OCH(2)CH(2)NMe(2))(2)][H(2)OB(C(6)F(5))(3)] (9), respectively. Structures of 3 and 6 were established by single-crystal X-ray diffraction analysis. (C) 2009 Elsevier B.V. All rights reserved.