| Popis: |
Three new penta- and hexacoordinated tin compounds ( 1 – 3 ) were prepared from PhSnCl 3 , Ph 2 SnCl 2 and Ph 3 SnOH and 3-methyl-2-hydroxy-2-cyclopenten-1-one ( L ). Compounds 1 – 3 were characterized by IR, mass spectra, elemental analysis, 1 H, 13 C, and 119 Sn NMR. The ligand acts as a bidentate giving the tin esters and coordinating the tin by the carbonyl group. Compound 1 (PhSnCl 2 L · EtOH) has an hexacoordinated tin atom, with an octahedral distorted geometry, which is a stereogenic center. Compounds 2 (Ph 2 SnClL) and 3 (Ph 3 SnL) have pentacoordinated tin atoms. The structures were determined by X-ray diffraction analyses. In the solid state 1 presents a racemic pair, linked by strong hydrogen bonds and 2 and 3 “Berry exchange coordinate” geometry. |
Full Text from ScienceDirect