New Phosphorus Heterocycles by Rearrangement of a [1,4‐Bis(trimethylsilyl) η8‐cyclooctatetraene‐1,3,5‐triphospha‐7‐hafnanorbornadiene Complex

New Phosphorus Heterocycles by Rearrangement of a [1,4‐Bis(trimethylsilyl) η8‐cyclooctatetraene‐1,3,5‐triphospha‐7‐hafnanorbornadiene Complex
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[1,4-双(三甲基硅基) η8-环辛四烯-1,3,5-triphospha-7-hafnannorbornadiene配合物重排制备新磷杂环

DOI:
10.1002/cber.19971301022
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发表时间:
1997
期刊:
Chemische Berichte
影响因子:
--
通讯作者:
U. Bergsträsser
U. Bergsträsser
中科院分区:
--
文献类型:
--
作者:
P. Binger;S. Leininger;K. Günther;U. Bergsträsser

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[1,4-双(三甲基甲硅烷基)-n8-环辛四烯]-2, 4, 6-三叔丁基-1, 3, 5-triphospha-7-hafnannorbornadiene (3) 在 300 ℃下加热时几乎定量地重排为相应的 3,5,6-tri-tert-丁基-1,2,4-triphospha-7-hafnannorbornadiene 络合物 5 70°C。在 50°C 下用三甲基膦处理络合物 5 引起二叔丁基乙炔的置换,得到新的 (n4-三磷环丁二烯)铪络合物 7,其晶体结构已通过 X 射线分析确定。由络合物 5 3,5,6,-三叔丁基-1,2,4-三磷酸杜瓦苯 (6) 可以通过与六氯乙烷的氧化还原反应合成。
[1,4-Bis(trimethylsilyl)-n8-cyclooctatetraene]-2, 4, 6-tri-tert-butyl-1, 3, 5-triphospha-7-hafnanorbornadiene (3) rearranges nearly quantitatively to the corresponding 3,5,6-tri-tert-butyl-1,2,4-triphospha-7-hafnanorbornadiene complex 5 upon heating at 70°C. Treatment of complex 5 with trimethylphosphane at 50°C induces the displacement of di-tert-butylacetylene to give the new (n4-triphosphacyclobutadiene)hafnium complex 7, the crystalstructure of which has been determined by X-ray analysis. From complex 5 3,5,6,-tri-tert-butyl-1,2,4-triphospha Dewar benzene (6) can be synthesized by a redox reaction with hexachloroethane.