The infrared and Raman spectra of trans- and cis-tetrachloro-tetramethylbicylopropylidene
The infrared and Raman spectra of trans- and cis-tetrachloro-tetramethylbicylopropylidene
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DOI：
10.1016/j.saa.2008.03.015
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发表时间：
2008-12-01
影响因子：
4.4
通讯作者：
Skattebol, Lars
中科院分区：
文献类型：
--
作者：
Klaeboe, Peter;Skattebol, Lars
合成了标题化合物TRANS和cis-2，2，2‘，2’-tetrachloro-o-3，3.3‘，3’-tetramethyl-bicyclopopylidene，并记录了它们的红外光谱和拉曼光谱。反式化合物的红外光谱和拉曼光谱的不重合表明其具有C-2H对称性和平面环系。在顺式化合物中，大部分红外光谱和拉曼光谱谱带重合，可能存在C-2v对称性。在反式化合物中，外环C=C双键在1847 cm(-1)处产生一个中/弱的拉曼光谱。在顺式导数中，观察到了1825 cm(-1)的红外光谱和拉曼光谱。与相关分子的相似性。初步归属了反式和顺式化合物的环呼吸模式、反对称环伸展模式、CCL2异相和同相伸展模式以及面外环弯模式。(C)2008爱思唯尔B.V.保留所有权利。
The title compounds trans- and cis-2,2,2',2'-tetrachloro-o-3,3.3',3'-tetramethyl-bicyclopopylidene were synthesized, and their infrared and Raman spectra were recorded. Non-coincidence between the IR and Raman bands of the trans compound suggested C-2h symmetry and a planar ring system. in the cis compound most of the IR and Raman bands coincided and a C-2v symmetry seems likely. The exocyclic C=C double bond gave rise to a medium/weak Raman band at 1847cm(-1) in the trans compound. In the cis derivative IR and Raman bands both at 1825 cm(-1) were observed. From similarities with related molecules. the ring breathing, the antisymmetric ring stretch, the CCl2 out-of-phase and in-phase stretch and the out-of-plane ring bending modes have been tentatively assigned for the trans and cis compounds. (C) 2008 Elsevier B.V. All rights reserved.