Germacyclobutenes: generation by 1,1-carbalumination or 1,1-carbagallation and their photophysical properties.

Germacyclobutenes: generation by 1,1-carbalumination or 1,1-carbagallation and their photophysical properties.
复制标题

锗环丁烯:通过 1,1-碳铝化或 1,1-卡巴镓化生成及其光物理性质

DOI:
10.1002/chem.201405739
复制
发表时间:
2015
期刊:
影响因子:
--
通讯作者:
E.-U. Würthwein
E.-U. Würthwein
中科院分区:
--
文献类型:
--
作者:
W. Uhl;S. Pelties;J. Tannert;B. J. Ravoo;E.-U. Würthwein

文献摘要

参考文献

被引文献

相似文献

铝和镓官能化的烯基炔基锗烷,R12 Ge(C <$C <$R2)[C{E(CMe 3)2}<$C(H)<$R2](E=Al,Ga),表现出配位不饱和Al或Ga原子与完整乙炔基的α-C原子之间的紧密接触。这些相互作用激活Ge C(炔基)键,并有利于通过1,1-碳铝化或1,1-碳硼化反应将这些C原子热诱导插入E C(乙烯基)键。后一种方法第一次被证明是一个强大的替代已知的metalloy过程。具有不饱和GeC 3杂环和环内和环外C3-C键的锗杂环丁烯是由于与炔基的β-C原子同时形成GeC 3-C键而产生的。这些杂环化合物显示出有趣的光致发光行为,斯托克斯位移>110 nm。 这些迷人的性质是基于扩展的π-离域,包括位于Ge和Al的σ*-轨道。应用Al化合物的高水平量子化学DFT和TD-DFT计算来阐明它们的吸收和发射性质。他们揭示了一个双自由基激发态,其中一个π电子转移到Al的空p轨道和金属原子的质子化。
Aluminium‐ and gallium‐functionalised alkenylalkynylgermanes, R12Ge(CCR2)[C{E(CMe3)2}C(H)R2] (E=Al, Ga), exhibit a close contact between the coordinatively unsaturated Al or Ga atoms and the α‐C atoms of the intact ethynyl groups. These interactions activate the GeC(alkynyl) bonds and favour the thermally induced insertion of these C atoms into the EC(vinyl) bonds by means of 1,1‐carbalumination or 1,1‐carbagallation reactions. For the first time the latter method was shown to be a powerful alternative to known metallation processes. Germacyclobutenes with an unsaturated GeC3heterocycle and endo‐ and exocyclic CC bonds resulted from concomitant GeC bond formation to the β‐C atoms of the alkynyl groups. These heterocyclic compounds show an interesting photoluminescence behaviour with Stokes shifts of >110 nm. The fascinating properties are based on extended π‐delocalisation including σ*‐orbitals localised at Ge and Al. High‐level quantum chemical DFT and TD‐DFT calculations for an Al compound were applied to elucidate their absorption and emission properties. They revealed a biradical excited state with the transfer of a π‐electron into the empty p‐orbital at Al and a pyramidalisation of the metal atom.
二炔基锗烷的加氢铝化——通过分子内铝-碳相互作用合成烯基-炔基锗烷
DOI: 10.1039/c0nj00050g
发表时间: 2010
影响因子: 3.3
作者:
W. Uhl;M. Rohling;Jutta Kösters
通讯作者: Jutta Kösters
三乙基硼烷:具有新功能的“旧”试剂 1,2-硼氢化。
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
B. Wrackmeyer;Ezzat Khan;Stefan Bayer;K. Shahid
通讯作者: K. Shahid
亚硅基和二硅烯添加到 Octa-1,3,5,7-四炔中:形成 C−C 连接的季硅烯 1,2
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
D. Ostendorf;A. Saak;M. Weidenbruch;H. Marsmann
通讯作者: H. Marsmann
DOI: 10.1002/chin.200736054
发表时间: 2007-05
期刊: ChemInform
影响因子: --
作者:
C. K. Jin;Toshiaki Yamada;S. Sano;M. Shiro;Y. Nagao
通讯作者: C. K. Jin;Toshiaki Yamada;S. Sano;M. Shiro;Y. Nagao
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
Ezzat Khan;Stefan Bayer;B. Wrackmeyer
通讯作者: B. Wrackmeyer