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HWAHAK KONGHAK,
Vol.40, No.4, 422-426, 2002
Vol.40, No.4, 422-426, 2002
나노크기의 카르복실레이토 은(I) 카벤 착체 화합물의 합성 및 특성
Synthesis and Characterization of Nano-sized Carboxylato Silver carbene Complexes
본 연구에는 은 carboxylate 착체와 1,3,4,5-tetramethylimidazol-2-ylidenes 배위자와의 반응으로부터 다양한 은 착체화합물(착체1-5)을 얻었다. 합성된 착체는 1H/13C-NMR, FT-IR, UV, 원소분석을 통해 특성을 파악하였다. 특히 착체 2는 X-ray 결정구조해석을 통해 분자구조를 알 수가 있었다. 얻어진 착체 2는 단분자 구조를 보였고, carboxylates가 은 원자를 중심으로 1,3,4,5-tetramethylimidazol-2-ylidene 배위자와 동일 평면상에 존재하고, carboxylates 배위자는 은 원자에 비대칭으로 존재함을 알 수가 있었다. 그리고 착체 2의 1,3,4,5-tetramethylimidazol-2-ylidene중 carbenenic 탄소원자의 화학이동은 free-1,3,4,5-tetramethylimidazol-2-ylidene 보다 34.5-39.7 ppm 정도 고자기장쪽으로 이동됨을 알 수가 있었다.
The complexes of (carboxylato) Ag(I) (1,3,4,5-tetramethylimidazol-2-ylidenes) (complexes 1-5) were prepared by the reaction of silver carboxylates with 1,3,4,5-tetramethylimidazol-2-ylidenes as ligands. The products were characterized by 1H/13C-NMR, FT-IR, UV and elemental analysis. Especially complex 2 consisted of the monomeric units arranged on the same plane on the basis of the result for X-ray crystallographic analysis. The oxygen in carboxylates moiety is asymmetric with respect to silver atom. In the 13C-NMR spectrum, the carbenenic carbon atom in the complexes is shifted upfield by ca. 34.5-39.7 ppm.
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