Cyclic bis(trifluoromethyl)borates [cyclo-O(CH2)nB(CF3)2]- (n=3,4,5):: structure of Cs[cyclo-O(CH2)4B(CF3)2]

被引：3
|
作者：
Brauer, DJ [1 ]
Pawelke, G [1 ]
机构：
[1] Berg Univ Gesamthsch Wuppertal, D-42097 Wuppertal, Germany
来源：
JOURNAL OF FLUORINE CHEMISTRY | 2004年 / 125卷 / 06期
关键词：
boron; fluorine; rings;
D O I：
10.1016/j.jfluchem.2004.01.018
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Hydroboration of H2C=CH-(CH2)((n-2))(CF3)(2)B.NMe3 (n = 3 (1), 4 (2), 5 (3)) with 9-BBN followed by alkaline oxidation with H2O2 yields HO(CH2)(n)(CF3)(2)B.NMe3 (n = 3 (4),4 (5),5 (6)). Upon heating HO(CH2)(n)(CF3)(2)B.NMe3 rearranges under elimination of HNMe3+ to form the cyclic borates [cyclo-O(CH2)(n)B(CF3)(2)](-) (n = 3 (7), 4 (8), 5 (9)). In case of n = 4 and 5 side products [cyclo-O(CH2)(n)(CF3)BF3](-) (10) and (11) could be identified and the Cs salts of 7, 8, 9 and 11 have been isolated. The constitution of the novel boron compounds has been deduced from multinuclear NMR, Raman and mass spectra. The structure of Cs[cyclo-O(CH2)(4)B(CF3)(2)] has been determined by X-ray diffraction. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：975 / 980
页数：6
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