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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Sterically encumbered acyclic diphosphazanes: synthesis, conformations and coordination behavior
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Sterically encumbered acyclic diphosphazanes: synthesis, conformations and coordination behavior

机译:立体阻碍的无环二磷氮烷:合成,构象和配位行为

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The reaction between lambda(3)-diphosphazane [EtN(PCl2)(2)] and the sodium salts of substituted phenols affords sterically encumbered diphosphazanes [EtN{P(OR)(2)}(2)] (R= -(C6H3Pr2)-Pr-i-2,6 (1), -C6H3Me2-2,6 (2) and -C6H2Me3-2,4,6 (3)). When the same reaction was carried out with bulky sodium 2,4-di-tert-butyl-4-methylphenoxide, only a monosubstitution takes place to result in the formation of [EtN{PCl(OR)}(2)] (R= -(C6H2Bu2)-Bu-t-2,6-Me-4) (4). Further reaction of 2 with [Mo(CO)(4)(NBD)] produces cis-[(EtN{P(OC6H3Me2-2,6)(2)}(2)) Mo(CO)(4)] (5). Diphosphazanes 1-4 and the metal derivative 5 have been characterized by means of their analytical data and EI-MS, IR and multinuclear NMR (H-1 and P-31) spectral data. The solid-state structure of the diphosphazanes 1, 2 and 4, and the molybdenum complex 5 have been determined by X-ray diffraction studies. Irrespective of the size of substituent, the bulky groups on the phosphorus and nitrogen are on the same side of the P-N-P skeleton with a local C-2v symmetry. The central nitrogen remains almost trigonal planar in all the compounds.
机译:Lambda(3)-diphosphazane [EtN(PCl2)(2)]与取代酚的钠盐之间的反应提供空间受限的diphosphazanes [EtN {P(OR)(2)}(2)](R =-(C6H3Pr2 )-Pr-i-2,6(1),-C6H3Me2-2,6(2)和-C6H2Me3-2,4,6(3))。当使用大体积的2,4-二叔丁基-4-甲基苯氧基钠进行相同的反应时,仅发生单取代,从而形成[EtN {PCl(OR)}(2)](R = -(C6H2Bu2)-Bu-t-2,6-Me-4)(4)。 2与[Mo(CO)(4)(NBD)]的进一步反应产生顺式[[EtN {P(OC6H3Me2-2,6)(2)}(2))Mo(CO)(4)](5 )。二磷氮烷1-4和金属衍生物5的特征在于其分析数据以及EI-MS,IR和多核NMR(H-1和P-31)光谱数据。二磷氮烷1、2和4以及钼配合物5的固态结构已经通过X射线衍射研究确定。不论取代基的大小如何,磷和氮上的大基团都位于P-N-P骨架的同一侧,具有局部C-2v对称性。在所有化合物中,中心氮几乎保持三角平面。

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