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The new diphosphanylphosphido complexes of tungsten(vi) and molybdenum(vi). Their synthesis, structures and properties†
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-07-05 00:00:00 , DOI: 10.1039/c8dt01977k
A. Wiśniewska 1, 2, 3, 4, 5 , R. Grubba 1, 2, 3, 4, 5 , Ł. Ponikiewski 1, 2, 3, 4, 5 , M. Zauliczny 1, 2, 3, 4, 5 , J. Pikies 1, 2, 3, 4, 5
Affiliation  

We report on the reactivity of R2P–P(Li)–PR′2 (R = tBu, iPr, R′ = NEt2, iPr) towards diimido complexes [(dippN)2MCl2·dme] (M = Mo, W and dipp = 2,6-iPr2C6H3). A series of new complexes with diphosphanylphosphido ligands R2P–P–PR′2 were isolated. The solid-state structures of [(dippN)2M(Cl)(1,2-η-iPr2P–P–PiPr2)] (2Mo and 2W) and [(dippN)2M(Cl){1,2-η-tBu2P–P–P(NEt2)2}] (3Mo and 3W) were established by single-crystal X-ray diffraction analysis and indicate a side-on geometry of the R2P–P–PR′2 moiety. 3W and 3Mo are the first triphosphorus complexes with the amido ligand NEt2 on the P atom. [(dippN)2M(Cl)(1,2-η-tBu2P–P–PtBu2)] (1Mo and 1W) and 3Mo and 3W display similar side-on geometry in solution and in the solid state. By contrast, 2Mo and 2W reveal a dynamic behavior in solution. For the first time, the reactivity of diphosphanylphosphido complexes towards different nucleophiles was studied. The complexes react with the phosphorus nucleophile Ph2PLi, yielding phosphanylphosphinidene complexes [(dippN)2M(Cl)(η2-P-PR2)] Li+ (M = Mo, W) together with related diphosphanes R′2P–PPh2. Carbon nucleophile MeLi does not yield [(dippN)2M(Cl)(η2-P-PR2)] Li+ but substitutes a Cl ligand at the metal center. Moreover, we compare the coordination of the R2P–P–PR′2 moiety to different metal centers based on DFT methods.

中文翻译:

钨(vi)和钼(vi)的新的二磷烷基膦酸酯配合物。它们的合成,结构和性质

我们对R的反应性报告2 P-P(Li)的-PR' 2(R =卜,IPR,R'= NET 2,IPR)朝向diimido配合物[(dippN)2的MC1 2 ·DME](M = Mo,W和dipp = 2,6-iPr 2 C 6 H 3)。一系列带diphosphanylphosphido配体配合物的新- [R 2 P-P-PR' 2中分离得到。的固态结构[(dippN)2 M(Cl)的(1,2-η-的iPr 2 P-P-PiPr 2)](2Mo的2W)和[(dippN)2 M(Cl)的{1, 2-η- t Bu 2P-P-P(NET 22 }](3MO3W)通过单晶X射线衍射分析确定,并表示一个侧面在R的几何2 P-P-PR' 2部分。3W3Mo是在P原子上具有酰胺配体NEt 2的第一个三磷配合物。[(dippN)2 M(Cl)的(1,2-η-2 P-P-P2)](1Mo钢1W)和3MO3W在溶液和固态下显示相似的侧面几何形状。相比之下,2Mo2W揭示了溶液中的动态行为。首次研究了二膦酰基磷酸酯复合物对不同亲核试剂的反应性。复合物与亲核试剂磷反应博士2 PLI,得到phosphanylphosphinidene配合物[(dippN)2 M(Cl)的(η 2 -P-PR 2)] -+(M =钼,钨)与相关diphosphanes R c一起' 2 P–PPh 2。碳亲核试剂的MeLi不会产生[(dippN)2 M(Cl)的(η 2 -P-PR 2)] Li +,但在金属中心取代了Cl配体。此外,我们比较R的协调2 P-P-PR' 2部分基于DFT方法的不同的金属中心。
更新日期:2018-07-05
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