A new aliphatic N,C,N’-pincer ligand with pendant guanidine groups
A new aliphatic N,C,N’-pincer ligand with pendant guanidine groups
复制标题
带有胍基侧基的新型脂肪族 N,C,N-钳配体
DOI：
10.1016/j.ica.2014.05.021
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发表时间：
2014
影响因子：
2.8
通讯作者：
P. Hitchcock
中科院分区：
文献类型：
--
作者：
M. Coles;M. Khalaf;P. Hitchcock
双(胍)化合物H2C{hpp}2(hppH = 1,3,4,6,7,8-六氢-2H-嘧啶并[1,2-a]嘧啶)在桥亚甲基处去质子化，生成相应的碳负离子，[CH{hpp}2]−。与 EMe3Cl (E = Si, Sn) 进行原位反应，得到有机元素化合物 HC{SiMe3}{hpp}2(1) 和 Sn(HC{hpp}2)Me3(2)。 1和2的结构表征显示有机金属配体的胍基团与较重的第14族元素相互作用的趋势，并且锡化合物含有主族元素的脂肪族N,C,N'-钳配体的罕见例子。相反，尝试制备二氯化铝得到离子化合物[Al(HC{hpp}2][AlCl4] (3)，其含有独特的六配位、(二)有机铝铯阳离子。
The bis(guanidine) compound H2C{hpp}2(hppH = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine) was deprotonated at the bridging methylene group to generate the corresponding carbanion, [CH{hpp}2]−. Thein situreaction with EMe3Cl (E = Si, Sn) afforded the organo-element compounds HC{SiMe3}{hpp}2(1) and Sn(HC{hpp}2)Me3(2). Structural characterization of1and2showed a tendency for the guanidine groups of the organometallic ligand to interact with the heavier group 14 elements, and that the tin compound contained a rare example of an aliphaticN,C,N′-pincer ligand of a main group element. Attempted preparation of the aluminium dichloride instead gave the ionic compound, [Al(HC{hpp}2][AlCl4] (3) that contains a unique six-coordinate, (di)organoalumocenium cation.