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.
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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
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
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
Aluminium‐ and gallium‐functionalised alkenylalkynylgermanes, R12Ge(CCR2)[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 GeC(alkynyl) bonds and favour the thermally induced insertion of these C atoms into the EC(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 CC bonds resulted from concomitant GeC 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.
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影响因子:
3.3
作者:
W. Uhl;M. Rohling;Jutta Kösters
通讯作者:
Jutta Kösters
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
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