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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >1,2-BIS(DIMETHYLAMINO)-3,4,5-TRIPHENYL-3,4,5-TRIPHOSPHA-1,2-DIBOROLANE AND 1,2-BIS(DIMETHYLAMINO)-3,4,5,6-TEBRA-TBUTYL-3,4,5,6-TETRAPHOSPHA-1,2-DIBOR INE - SYNTHESIS AND STRUCTURE AS WELL AS CALCULATIONS ON THE MOLECULAR STRUCTURE [German]
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1,2-BIS(DIMETHYLAMINO)-3,4,5-TRIPHENYL-3,4,5-TRIPHOSPHA-1,2-DIBOROLANE AND 1,2-BIS(DIMETHYLAMINO)-3,4,5,6-TEBRA-TBUTYL-3,4,5,6-TETRAPHOSPHA-1,2-DIBOR INE - SYNTHESIS AND STRUCTURE AS WELL AS CALCULATIONS ON THE MOLECULAR STRUCTURE [German]

机译:1,2-双(二甲氨基)-3,4,5-三苯-3,4,5-三磷-1,2-二硼烷和1,2-双(二甲氨基)-3,4,5,6-TEBRA- TBUTYL-3,4,5,6-四氟-1,2-二硼烷-的合成与结构以及分子结构的计算[德语]

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摘要

The diphosphides K-2[(C6H5)P-(C6H5)P-P(C6H5)], 4 or K-2[(tBuP)-(tBuP)(2)-P(tBu)], 5, react with (ClBNMe(2))(2) to form the binary 5-membered ring system 1,2-bis(dimethylamino)-3,4, 5-triphenyl-3,4,5-triphospha-1,2-diborolane (C6H5P)(3)(BNMe(2))(2), 2a, and the 6-membered ring system 1,2-bis(dimethylamino)-3,4,5,6-tetra-tbutyl-3,4,5,6-tetraphospha-1,2-dibor ine, (tBuP)(4)(BNMe(2))(2), 3a, respectively. 2a and 3a could be obtained in a pure form and characterized NMR spectroscopically and by X-ray structure analyses. The two ring systems are folded; 2a exists in the ''envelope''- 3a in the ''boat''-conformation. Ab initio computations for 3,4,5-triphospha-1,2-diborolane M5 show that the global minimum is characterized by one E-P double bond. The parent compound geometry M6 is characterized by transannular bonding in the PH-BH-BH-PH moiety which differs in character from those in the four- and five-membered rings (BH)(2)(PH)(2) and (BH)(2)(PH)(3) M5 d, respectively. Explicit calculation of the influence of amino substituents on boron improved agreement of the bond length between computed and X-ray data. [References: 25]
机译:二磷化物K-2 [((C6H5)P-(C6H5)PP(C6H5)],4或K-2 [(tBuP)-(tBuP)(2)-P(tBu)],5,与(ClBNMe( 2))(2)形成二元5元环系统1,2-双(二甲基氨基)-3,4,5-三苯基-3,4,5-三磷-1,2-二硼烷(C6H5P)(3 )(BNMe(2))(2),2a和6元环系统1,2-双(二甲基氨基)-3,4,5,6-四叔丁基-3,4,5,6-四磷-1,2-diborine,(tBuP)(4)(BNMe(2))(2),3a。可以以纯净形式获得图2a和3a,并通过X射线结构分析在光谱上表征了NMR。两个环系统已折叠; 2a存在于“船”形的“信封”中-3a。 3,4,5-三磷-1,2-二硼烷M5的从头算计算表明,整体最小值由一个E-P双键表征。母体化合物M6的特征在于PH-BH-BH-PH部分中的跨环键,其特征不同于四元和五元环(BH)(2)(PH)(2)和(BH )(2)(PH)(3)M5 d。氨基取代基对硼的影响的显式计算提高了计算和X射线数据之间键长的一致性。 [参考:25]

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