Metal complexes of amino acids. 3. The circular dichroism of cobalt(3) ammine and ethylenediamine complexes with L-amino acids.
Metal complexes of amino acids. 3. The circular dichroism of cobalt(3) ammine and ethylenediamine complexes with L-amino acids.
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氨基酸的金属络合物。
DOI：
10.1246/bcsj.39.2417
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发表时间：
1966
影响因子：
4
通讯作者：
Y. Shimura
中科院分区：
文献类型：
--
作者：
T. Yasui;J. Hidaka;Y. Shimura
为了研究配位在配合物中的L-氨基酸对中心金属离子的邻位效应，制备了三种类型的L-氨基酸钴（III）配合物，即：L-氨基酸钴（III）、L-氨基酸钴（III）、L-氨基酸钴（III）和L-氨基酸钴（III）。例如，[Co（NH3）5（L-amH）]X3、[Co（L-am）（NH3）4] SO 4和反式-[Co en 2（L-amH）2]X3，其中L-amH表示L-氨基酸，并且其中X是Cl、Br或I。在650 ~ 300 mμ波长范围内测定了它们水溶液的圆二色性（CD）和旋光色散（RD）光谱。在第一吸收带区域，[Co（NH3）5（L-amH）]3+和反式-[Co en 2（L-amH）2]3+离子分别在具有[Co N5 O]-型结构的C4 v对称性和具有反式-[Co N4 O2]-型结构的D4 h对称性的配合物中显示一个或两个CD带。在反式配合物中观察到的CD带的位置与第一吸收带的分裂组分Ia和Ib的最大值吻合得很好。研究了不同[Co（L-am）（NH 3）4]2+离子（其中L-am为B）的圆二色性光谱。
In order to study the vicinal effect of the L-amino acid coordinated in a complex on the central metal ion, a number of cobalt(III) L-amino acid complexes of three types were prepared, i. e., [Co(NH3)5(L-amH)]X3, [Co(L-am)(NH3)4]SO4, and trans-[Co en2(L-amH)2]X3, where L-amH denotes an L-amino acid, and where X is Cl, Br, or I. The circular dichroism (CD) and the rotatory dispersion (RD) spectra of their aqueous solutions were measured in the wavelength range from 650 to 300 mμ. In the region of the first absorption band, both the [Co(NH3)5(L-amH)]3+ and the trans-[Co en2(L-amH)2]3+ ions show one or two CD bands to be expected in complexes of the C4v symmetry with a structure of the [Co N5O]-type and of the D4h symmetry with a structure of the trans-[Co N4O2]-type respectively. The positions of the CD bands observed in the trans complexes coincide well with the maxima of the split components, Ia and Ib, of the first absorption band. The CD spectra of different [Co(L-am)(NH3)4]2+ ions, in which L-am is a b...