Mirror Symmetry Breaking of cis-[Ni(NCS)(2)tren]: Special Chiral Conformations of Chelate Rings

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	Mirror Symmetry Breaking of cis-[Ni(NCS)(2)tren]: Special Chiral Conformations of Chelate Rings
	Liu Cheng-Yong ; Yan Jian-Xin ; Lin Yi-Ji ; Li Dan ; Fang Xue-Ming ; Zhang Hui ; Zhang H(章慧)
刊名	http://dx.doi.org/10.3866/PKU.WHXB201112091
	2012-02
关键词	TRANSITION-METAL COMPLEXES STATE CIRCULAR-DICHROISM SCHIFF-BASE COMPLEXES CONGLOMERATE CRYSTALLIZATION SPONTANEOUS RESOLUTION COORDINATION-COMPOUNDS ABSOLUTE-CONFIGURATION CD SPECTRA OPTICAL-ACTIVITY COBALT(III) COMPLEXES
英文摘要	National Natural Science Foundation of China [20773098, 20973136]; In order to explore the chiral origin of cis-[Ni(NCS)(2)tren] [tren: tris(2-aminoethyl) amine], a pair of chiral crystals of cis-[Ni(NCS)(2)tren] was characterized by X-ray single crystal structural analysis, solution UV-Vis-near infrared (NIR) spectroscopy, solid state UV-circular dichiroism (CD), and powder X-ray diffraction (XRD) spectra. The results indicated that the chiral crystals of cis-[Ni(NCS)(2)tren] were obtained by mirror symmetry-breaking crystallization, and the special chiral ring conformations (delta delta lambda, lambda lambda delta) of the coordinated tripod-type tren ligands are responsible for the chiral origin of cis-[Ni(NCS)(2)tren]. The Cotton effects of Ni(II) complexes in the solid-state UV-CD spectra are presumably attributed to the pi-pi* and charge-transfer chromophores of the NCS- ligands by the chiral perturbation of the helical ring conformations and metal-centered chirality. According to the statistical results of solid-state CD spectra of cis-[Ni(NCS)(2)tren] for twenty batch syntheses, their enantiomeric excess (ee) values are between 39% and 100%.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/63114]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Liu Cheng-Yong,Yan Jian-Xin,Lin Yi-Ji,et al. Mirror Symmetry Breaking of cis-[Ni(NCS)(2)tren]: Special Chiral Conformations of Chelate Rings[J]. http://dx.doi.org/10.3866/PKU.WHXB201112091,2012.
APA	Liu Cheng-Yong.,Yan Jian-Xin.,Lin Yi-Ji.,Li Dan.,Fang Xue-Ming.,...&章慧.(2012).Mirror Symmetry Breaking of cis-[Ni(NCS)(2)tren]: Special Chiral Conformations of Chelate Rings.http://dx.doi.org/10.3866/PKU.WHXB201112091.
MLA	Liu Cheng-Yong,et al."Mirror Symmetry Breaking of cis-[Ni(NCS)(2)tren]: Special Chiral Conformations of Chelate Rings".http://dx.doi.org/10.3866/PKU.WHXB201112091 (2012).