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Cr(III)-Tetraaza Macrocyclic Complexes Containing Auxiliary Ligands (Part II); Synthesis and Characterization of Cr(III)-Citrato Macrocyclic Complex
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  • Cr(III)-Tetraaza Macrocyclic Complexes Containing Auxiliary Ligands (Part II); Synthesis and Characterization of Cr(III)-Citrato Macrocyclic Complex
  • Cr(III)-Tetraaza Macrocyclic Complexes Containing Auxiliary Ligands (Part II); Synthesis and Characterization of Cr(III)-Citrato Macrocyclic Complex
저자명
Byun. Jong-Chul,Park. Yu-Chul,Youn. Jeung-Su,Han. Chung-Hun,Lee. Nam-Ho
간행물명
Bulletin of the Korean Chemical Society
권/호정보
2005년|26권 4호|pp.634-640 (7 pages)
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대한화학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The reaction of cis-[Cr([14]-decane)(OH$_2)_2]^+$ ([14]-decane = rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-teraazacyclotetradecane) with auxiliary ligands {$L_a$ = citrate(cit)} leads to a new dimeric complex cis-[{Cr([14]-decane)($mu$-cit)}$_2](ClO_4)_2$. This binuclear complex has been structurally characterized by a combination of elemental analysis, conductivity, IR and Vis spectroscopy, mass spectrometry, and X-ray crystallography. Analysis of the crystal structure of cis-[{Cr([14]-decane)($mu$-cit)})($_2]^+$ reveals that each chromium has a distorted octahedral coordination environment and citrato ligands are monodentate to the two chromium atoms via the carboxyl groups. For dimeric complex the bridging geometry is as follows: Cr$ldots$Cr = 7.361 $AA$; Cr-O(average) = 1.958 (8) $AA$; Cr-N range = 2.108 (9)-2.147(9) $AA$; N(1)-Cr-N(3) (equatorial position) = 98.0(4)$^{circ}$; N(2)-Cr-N(4) (axial position) = 166.4(4)$^{circ}$; O(1)-Cr-N(2) = 98.1(4)$^{circ}$; O(3)-Cr-N(4) = 96.6(3)$^{circ}$; O(1)-Cr-O(3) = 90.4$^{circ}$. The FAB mass spectrum of the dimeric complex displays peak due to the molecular ions cis-[{Cr([14]-decane)($mu$-cit)})($_2]^+$ at m/z 1053.