Synthesis and structural characterization of symmetrical closo-4,7-I2-1,2-C2B10H10 and [(CH3)3NH][nido-2,4-I2-7,8-C2B9H10]

被引：18
|
作者：
Ramachandran, BM [1 ]
Knobler, CB [1 ]
Hawthorne, MF [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
来源：
INORGANIC CHEMISTRY | 2006年 / 45卷 / 01期
关键词：
D O I：
10.1021/ic051395w
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The boron-atom insertion reaction of nido-9,11-I-2-7,8-C2B9H92-, with the HBCl2:SMe2 complex yields closo-4,7-I(2)1,2-C2B10H10, 1, in excellent yield. Although the two boron atoms (133 and 136) nearest to the carbon atoms in 1 are equally available for attack by nucleophiles, the boron-degradation reaction of 1 with alkoxide ion occurs only at the B6 vertex, yielding regioselectively [(CH3)(3)NH][nido-2,4-12-7,8-C2B9H10], 2. The molecular structures of 1 and 2 have been determined by X-ray diffraction studies. Crystallographic data are as follows. For 1, monoclinic, space group P2(1)/n, a = 6.9199(19) angstrom, b = 23.9560(7) angstrom, c = 7.2870(2) angstrom, beta = 94.081(4)degrees, V = 1204.9(6) angstrom(3), Z = 4, rho(calcd) = 2.18 g cm(-3), R = 0.020, R-w = 0.0610; for 2, orthorhombic, space group Pca2(l), a = 14.1141(7) angstrom, b 7.0276(4) angstrom, c = 16.4602(g) angstrom(3), V = 1632.7(15) angstrom(3), Z = 4, rho(calcd) = 1.81 gcm(-3), R = 0.022, R-w = 0.0623.
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收藏
页码：336 / 340
页数：5
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