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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Intramolecular coupling of BrO stretching vibrations in solid bromates, infrared and Raman spectroscopic studies on M(BrO3)(2)center dot 6H(2)O (M = Mg, Co, Ni, Zn) and Ni(ClO3)(2)center dot 6H(2)O
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Intramolecular coupling of BrO stretching vibrations in solid bromates, infrared and Raman spectroscopic studies on M(BrO3)(2)center dot 6H(2)O (M = Mg, Co, Ni, Zn) and Ni(ClO3)(2)center dot 6H(2)O

机译:BrO在固体溴酸盐中的拉伸振动的分子内耦合,红外和拉曼光谱研究M(BrO3)(2)中心点6H(2)O(M = Mg,Co,Ni,Zn)和Ni(ClO3)(2)中心点6H(2)O

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摘要

Infrared and Raman spectra of the isostructural cubic halate hexahydrates M(BrO3)(2). 6H(2)O (M = Mg, Co, Ni, Zn) and Ni(ClO3)(2). 6H(2)O (space group, Pa (3) over bar; Z = 4) are presented. They are discussed with respect to the strength of the O-H . . . OXO2 hydrogen bonds (hydrogen bond acceptor capability, synergetic effect) and the order of the BrO stretching modes. In the case of undistorted bromate ions, e.g. at C-3 lattice sites, the order of the symmetric (nu (1)) and asymmetric (nu (3)) XO stretching modes is nu (1) < (3) as for ClO3- but in contrast to IO3- with nu (1) > nu (3). The relative order of nu (1) and nu (3) of halate ions is mainly governed by the specific masses of the halogen atoms and the angles of the XO3- ions. The latter decrease in the sequence ClO3- (107 degrees) > BrO3- > IO3- (< 100). The Raman scattering intensities of the asymmetric XO stretching modes nu (3) of the title compounds are unusually low ( < 5% those of (1)). (C) 2000 Elsevier Science B.V. All rights reserved. [References: 25]
机译:异水合立方卤化物六水合物M(BrO3)(2)的红外和拉曼光谱。 6H(2)O(M = Mg,Co,Ni,Zn)和Ni(ClO3)(2)。出现了6H(2)O(空间组,条形图上的Pa(3); Z = 4)。讨论了有关O-H强度的问题。 。 。 OXO2氢键(氢键受体能力,协同效应)和BrO拉伸模式的顺序。对于未变形的溴酸盐离子,例如在C-3晶格位置,对称的(nu(1))和非对称的(nu(3))XO拉伸模式的顺序与ClO3-一样为nu(1) nu(3)。卤离子的nu(1)和nu(3)的相对顺序主要由卤素原子的比质量和XO3-离子的角度决定。后者以ClO3-(107度)> BrO3-> IO3-(<100度)的顺序降低。标题化合物的不对称XO拉伸模式nu(3)的拉曼散射强度异常低((1)的<5%)。 (C)2000 Elsevier Science B.V.保留所有权利。 [参考:25]

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