臺灣博碩士論文加值系統

以吡啶與雙咪唑碳烯所合成的配位基L[X]2，中間是以methylene作為連結，形成py-CH2-imi-CH2-imi-CH2-py的結構。將配位基L[BF4]2與Ag2O，於室溫下反應，可得金屬錯化合物[Ag2L2][BF4]2，其結構為兩配位基與兩銀原子配位形成dinuclear的型態，而兩銀原子的距離為3.349 Å，顯示存在有silver-silver interaction。
另一方面，將配位基L[PF6]2與Ni(OAc)2反應，在加熱迴流的條件下，可得金屬錯化合物NiL[PF6]2，配位基以四個配位點把金屬鎳原子螯合配位在整個結構的中心，對於鎳中心而言是扭曲的方形平面 (distorted square planar) 構形。另外，將金屬錯化合物NiL[PF6]2應用於Heck reaction 催化反應測試上則有顯著的成效。

1,1'-dipicoly-3,3'methylenediimidazolium ditetrafluoroborate (1) reacts with silver(I) oxide in methanol at room temperature to give a dinuclear silver(I)-carbene complex(2). The complex was characterized spectrally. The structure of the complex was further confirmed by using single crystal X-ray analysis and showing that two N-heterocyclic carbene ligands coordinate to two silver atoms. The Ag-Ag distance of 3.3 Å indicting the existence of silver-silver interaction.
On the other hand, reaction of the 1,1'-dipicoly-3,3'methylenediimidazolium dihexafluorophosphate with nickel(II) acetate in acetonitrile yields yellowish green nickel complex(3). The structure of the novel diamagnetic mononuclear Ni(II) complex, as determined by a single crystal X-ray analysis, reveals a distorted square-planar geometry at the nickel center, which is bonded with two pyridyl nitrogens and two heterocyclic carbene moieties. This complex has been tested and proved to be effective to catalyze the Heck reaction.

目錄
論文提要---------------------------------------ii
圖表目錄----------------------------------------v
第一章、 緒論-----------------------------------1
第二章、 結果與討論-----------------------------8
1.配位基的合成---------------------------8
2.金屬錯化合物的合成--------------------16
3.金屬錯化合物NiL[PF6]2在催化上的應用---31
4.總結----------------------------------34
第三章、 實驗部份------------------------------35
第四章、 參考文獻------------------------------47
第五章、 附錄----------------------------------50

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