Inhaltszusammenfassung

The title compound (EtO)2P(O)CH2Si(Me)2CH2SnMe2Cl (2) has been synthesized by reaction of the new functional Grignard reagent (EtO)2P(O)CH2CH2SiMe2CH2MgCl with Me3SnCl and subsequent treatment with Me2SnCl2. 2 crystallizes in the non-centrosymmetric orthorhombic space group P2(1)2(1)2(1). The structure was refined to a final R-value of 0.0476. The tin atom is pentacoordinated and exhibits a nearly ideal trigonal-bipyramidal coordination (Sn-Cl 2.518(3), Sn ... O 2.371(5) angstrom). This c...The title compound (EtO)2P(O)CH2Si(Me)2CH2SnMe2Cl (2) has been synthesized by reaction of the new functional Grignard reagent (EtO)2P(O)CH2CH2SiMe2CH2MgCl with Me3SnCl and subsequent treatment with Me2SnCl2. 2 crystallizes in the non-centrosymmetric orthorhombic space group P2(1)2(1)2(1). The structure was refined to a final R-value of 0.0476. The tin atom is pentacoordinated and exhibits a nearly ideal trigonal-bipyramidal coordination (Sn-Cl 2.518(3), Sn ... O 2.371(5) angstrom). This coordination results from a 6-membered chelate involving a chair conformation. The structure of 2 is compared with analogous compounds containing a P=O ... Sn- or C=O ... Sn-coordination in the first place and a noncyclic structure, a five-membered chelate ring or a six-membered chelate ring in the second place. The pentavalent structure is retained in solution as has been shown by NMR measurements. » weiterlesen» einklappen

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