Non-racemic tin(IV) complexes containing P-chirogenic phosphinomethylphenolate ligands

Muller G; Brand J

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Non-racemic tin(IV) complexes containing P-chirogenic phosphinomethylphenolate ligands

机译：含有对-生膦膦酸甲基酚盐配体的非外消旋锡（IV）配合物

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摘要

The chiral Sn-IV complexes L*SnMe2Cl (5) and L*SnMe2H (6) containing the P-chirogenic o-[(t-butyl)(phenyl)phosphin omethyl] phenolate ligand (L*) have been synthesized via the respective lithium complex [LiL*](4) (4). The synthesis and structure of 4 are described. The stereochemical course of the ligand synthesis was monitored by chiral HPLC and single crystal structure analysis on suitable intermediates. The tin atom in 5 is pentacoordinate by intramolecular phosphine coordination whereas 6 contains tetracoordinate tin without phosphine coordination. Slow racernization of 5 at 100 degrees C afforded 5-rac while oxidation with elemental oxygen led under retention of configuration at phosphorus to the phosphinoxide complex o-[(tBu)(Ph)P*(O)CH2]-C6H4OSnMe2Cl (7) with P-O coordination to tin. The compounds 5, 5-rac, and 7 were also characterized by X-ray diffraction.

机译：含有P-手性邻-[（叔丁基）（苯基）膦膦甲基]酚盐配体（L *）的手性Sn-IV配合物L * SnMe2Cl（5）和L * SnMe2H（6）锂络合物[LiL *]（4）（4）。描述了4的合成和结构。通过手性HPLC和在合适的中间体上的单晶结构分析来监测配体合成的立体化学过程。 5中的锡原子通过分子内膦配位而被五配位，而6中的四配位锡没有膦配位。在100℃下缓慢的5消旋，得到5-rac，而元素氧的氧化导致在磷的构型保留下导致膦氧化物复合物o-[（tBu）（Ph）P *（O）CH2] -C6H4OSnMe2Cl（7） PO配锡。化合物5、5-rac和7也通过X射线衍射表征。

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《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2005年第14期|共10页
作者
Muller G; Brand J;
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正文语种 eng
中图分类化学;
关键词
chirality; chiral phosphines; tin; structure determination; RAY CRYSTAL-STRUCTURE; ENANTIOMORPH-POLARITY ESTIMATION; ABSOLUTE-STRUCTURE REFINEMENT; FREE-RADICAL CHEMISTRY; PHOSPHINE-BORANES; MOLECULAR-STRUCTURE; TIN HYDRIDES; HALIDES; LITHIUM; CONFIGURATION;

机译：手性;手性膦;锡;结构测定;射线晶体结构;对映体极性估计;绝对结构细化;自由基化学;膦-硼烷;分子结构;氢化锡;卤化锂;锂;

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Non-racemic tin(IV) complexes containing P-chirogenic phosphinomethylphenolate ligands

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