Carbon‐Halogen Bond Activation with Powerful Heavy Alkaline Earth Metal Hydrides
Carbon‐Halogen Bond Activation with Powerful Heavy Alkaline Earth Metal Hydrides
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用强大的重碱土金属氢化物活化碳卤键
DOI:
10.1002/ejic.202100529
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发表时间:
2021
影响因子:
2.3
通讯作者:
S. Harder
中科院分区:
文献类型:
--
作者:
M. Wiesinger;B. Rösch;C. Knüpfer;J. Mai;J. Langer;S. Harder
Reaction of [(DIPePBDI)SrH]2with C6H5X (X=Cl, Br, I) led to hydride‐halogenide exchange (DIPePBDI=HC[(Me)CN‐2,6‐(3‐pentyl)phenyl]2). Conversion rates increase with increasing halogen size (F<Cl<Br<I). Reaction of [(DIPePBDI)SrH]2with C6H5F was slow and ill‐defined but addition of C6H4F2gave smooth hydride‐fluoride exchange. After addition of THF the full range of Sr halogenides was structurally characterized: [(DIPePBDI)SrX ⋅ THF]2(X=F, Cl, Br, I). Mixtures of AeN“2and PhSiH3in situformed less defined but more robust Ae metal hydride clusters (AexN”yHz, Ae=Ca, Sr, Ba and N“=N(SiMe3)2) which are able to hydrodefluorinate C6H5F. Conversion rates increase with increasing metal size (Ca<Sr<Ba). Also alkylfluorides (1‐F‐hexane, F‐cyclohexane, 1‐F‐adamantane) could be converted but, due to solubility problems of the Ba species, the fastest conversion was found for Sr. These AeN”2/PhSiH3mixtures also converted SF6at room temperature to give undefined decomposition products. Addition of Me6Tren to a SrN“2/PhSiH3led to crystallization of [Sr6N”2H9⋅ (Me6Tren)3+][SrN“3−]; Me6Tren=tris[2‐(dimethylamino)ethyl]amine). After hydrodefluorination, Sr6N”4F8⋅ (Me6Tren)2was formed and structurally characterized. Dissolution in THF led to cluster growth and the larger cluster Sr16N“8F24⋅ (THF)12is structurally characterized. DFT calculations support that hydrodehalogenation of halobenzenes follows a concerted nucleophilic aromatic substitution mechanism (cSNAr).
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影响因子:
4.3
作者:
Spielmann, Jan;Harder, Sjoerd
通讯作者:
Harder, Sjoerd
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
Z. Ainbinder;L. Manzer;M. Nappa
通讯作者:
M. Nappa
影响因子:
16.6
作者:
Bauer, Heiko;Thum, Katharina;Harder, Sjoerd
通讯作者:
Harder, Sjoerd
影响因子:
16.6
作者:
Bauer, Heiko;Alonso, Mercedes;Harder, Sjoerd
通讯作者:
Harder, Sjoerd
影响因子:
16.6
作者:
Martin, Johannes;Knuepfer, Christian;Harder, Sjoerd
通讯作者:
Harder, Sjoerd