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  • 學位論文

含2-胺基-5鹵基嘧啶配位基醋酸銅(Ⅱ)錯合物之研究

Chemistry of Dicopper Tetraacetate Complexes Containing 2-amino-5-halopyrimidine Ligands.

指導教授 : 陳志德

摘要


中文摘要 本論文主旨在探討由2 –胺基,5 –鹵基嘧啶(2-amino-5-halopyrimidine)配位基與醋酸銅所合成之化合物之晶體結構,與其中所含的弱作用力,以及其對堆疊模式的影響。利用醋酸銅與三種不同配位基,2-amino-5-chloropyrimidine ( L1 ) , 2-amino-5-bromopyrimidine ( L2 ) , 2-amino-5-iodopyrimidine ( L3) 反應,可得到下列3種化合物:[Cu2(OAc)4(L1)2], 1; [Cu2(OAc)4(L2)2], 2與[Cu2(OAc)4(L3)2], 3 。以上3種化合物的構造均已利用 X-ray 鑑定之。 經由X-ray所鑑定出的結構可得知,化合物1 – 3都具有相似的構形。銅離子中心皆形成5配位的扭曲平面四角錐。底部的四邊行是由4個不同醋酸根離子的氧原子所組成,頂點的位置是由配位基上的氮原子所佔據。醋酸根離子是以一種syn,syn – η1:η1:μ2 的形式橋接到兩個中心金屬銅上來形成paddle-wheel的結構。分子與分子之間包含有N-H---N, 鹵素---鹵素與 π – π stacking等作用力,而形成二維層狀或三維網狀之超分子結構。化合物1 – 3的TGA熱性質分析,亦將加以探討。

並列摘要


Abstract The syntheses and structures of a series of copper compounds [Cu2(OAc)4(L1)2] (L1 = 2-amino-5-chloropyrimidine), 1, [Cu2(OAc)4(L2)2] (L2 = 2-amino-5-bromopyrimidine), 2 and [Cu2(OAc)4(L3)2] (L3 = 2-amino-5-iodopyrimidine), 3, are reported. All compounds have been structurally characterized by X-ray crystallography. Compounds 1 – 3 show the same structural type and each Cu2+ ion center adopts a distorted square pyramidal geometry. The basal position of the square pyramid is occupied by four oxygen atoms from four different carboxylate groups and the apical position is occupied by a nitrogen atom. The acetate anion adopts the syn,syn – η1:η1:μ2 bonding mode and bridge the Cu(Ⅱ) centers, forming a paddle-wheel type structure. The N-H---N, halogen - halogen and π – π stacking interactions were found in the structures, which link the molecules to form 2-D and 3-D supramolecular structures. The thermal properties of compounds 1 - 3 are also discussed.

參考文獻


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