6533b7d3fe1ef96bd125fe5f

RESEARCH PRODUCT

Darstellung und struktur von (EtO)2P(O)CH2Si(Me)2CH2SnMe2Cl—ein sechsringchelat mit sesselkonformation und PO ⋯ Sn(Cl)Me2CH2-trigonaler bipyramide am Lewis-aciden Zinn

Martin DrägerUte KolbElke FischerKlaus Jurkschat

subject

MetalationStereochemistryOrganic ChemistryCyclohexane conformationchemistry.chemical_elementCrystal structureRing (chemistry)BiochemistryMedicinal chemistryInorganic ChemistrychemistryX-ray crystallographyMaterials ChemistryMoleculeOrthorhombic crystal systemPhysical and Theoretical ChemistryTin

description

Abstract 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 P212121. 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) A). 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.

yearjournalcountryeditionlanguage
1992-01-01Journal of Organometallic Chemistry
https://doi.org/10.1016/0022-328x(92)83128-5