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• W1979331570 endingPage "611" @default.
• W1979331570 startingPage "603" @default.
• W1979331570 abstract "Ethoxylacetyl oxime 리간드 [HL, (1) 및 <TEX>$H_2L^1$</TEX>, (3)]와 아세트산 구리(II) 일수화물을 반응시켜 팔면체 및 사각평면착물을 각각 얻었다. 이들 착물을 원소분석, IR 및 UV-Vis 스펙트럼, 자기수자율, 전기전도도 및 ESR 스펙트럼으로 조사하였다. DMF에서 이들 착물의 몰전기전도도 측정한 결과 비이온성을 보였다. 실온 및 77 K에서 [<TEX>$(L)_2Cu(H_2O)_2$</TEX>], (2) 착물의 ESR 스펙트럼은 배위결합성을 갖는 축대칭(<TEX>$d_{x2-y2}$</TEX>)의 특성을 보이며, 또한 전형적인 쌍극자 상호작용에 의해 큰 띠나비를 갖는다. 그러나 착물 [<TEX>$(L^1)Cu$</TEX>], (4)는 고체상태에서 큰 띠넓임으로 인해 초미세 갈라짐이 관찰되지 않았는데, 이는 구리(II) 결합자리들 사이의 스핀-교환 상호작용에 의한 것으로 확인되었다. 실온에서 도포된 구리(II) 착물의 스펙트럼은 배위된 질소원자로 인해 극초미세 갈라짐을 보였다. 또한 이 물질은 공유 결합성을 갖는 축형태(<TEX>$d_{x2-y2}$</TEX>)의 특성을 보이고, 구리(II) 이온의 환경은 기본적으로 사각-평면 배열을 갖는다. 77 K의 얼어있는 메탄올에서 [<TEX>$(L_1)Cu$</TEX>], (4)의 스펙트럼은 이합체 화합물의 삼중항 상태의 특성을 보이며, 두 구리(II) 이온 중심 사이의 거리를 계산한 결과 4.8 이다. Ethoxylacetyl oxime ligands [HL, (1) and <TEX>$H_2L^1$</TEX>, (3)] react with copper(II) acetate monohydrate yield octahedral and square planar complexes, respectively. The complexes have been postulated due to elemental analyses, IR, UVVis. spectra, magnetic susceptibility, conductivity and ESR spectra. Molar conductance of the complexes in DMF indicates a non-ionic character. The ESR spectra of [<TEX>$(L)_2Cu(H_2O)_2$</TEX>], (2) complex at room temperature and 77K are characteristic of an axial symmetry (<TEX>$d_{x2-y2}$</TEX>) with covalent bond character and have a large line width typical of dipolar interactions. However, [<TEX>$(L^1)Cu$</TEX>], (4) complex in the solid state showed spectra of marked broadening and loss of hyperfine splitting confirming spinexchange interactions between the copper(II) sites. The spectrum of the doped copper(II) complex at room temperature showed super-hyperfine splitting from coordinated nitrogen atoms and it has an axial type (<TEX>$d_{x2-y2}$</TEX>) with covalent bond character and an essentially square-planar arrangement around the copper(II) ion. The spectrum of [<TEX>$(L^1)Cu$</TEX>], (4) in frozen methanol at 77K was characteristic of the triplet state of a dimer species and the distance found between the two copper(II) centers was calculated and is equal to 4.8 <TEX>${AA}$</TEX>." @default.
• W1979331570 created "2016-06-24" @default.
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• W1979331570 date "2011-08-20" @default.
• W1979331570 modified "2023-10-18" @default.
• W1979331570 title "Synthesis, Characterization and ESR Studies of New Copper(II) Complexes of Vicinal Oxime Ligands" @default.
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• W1979331570 doi "https://doi.org/10.5012/jkcs.2011.55.4.603" @default.
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