在過去的相關文獻中,多牙氮配位基2,7 –Di(2-pyridyl)-1,8-naphthyridine (bpnp)及其金屬錯合物已有一些報導,但對於鈀金屬的錯合物合成研究沒有報導。故在本篇論文中,利用Stille coupling,由2-(Tributylstannyl)pyridine及2,7-Dichloro-1,8-naphthyridine,在鈀金屬的催化之下,成功地合成出bpnp,並以其為主配位基,與零價的Pd2(dba)3及兩價的PdCl2(PhCN)2共同反應,合成出具有金屬金屬鍵的叁核鈀金屬錯合物[{Pd3Cl2(bpnp)2}Cl2]。由X光單晶繞射分析及電子密度分析儀器鑑定,顯示叁核鈀金屬的中心鈀,為一零價且六配位架構的型態存在。另外,在反應過程中,發現到bpnp會先個別地與Pd2(dba)3和PdCl2(PhCN)2反應,之後分別形成ㄧ錯合物,兩者再繼續互相反應,產生叁核鈀金屬錯合物。另ㄧ方面,將Pd3與CoCl2反應,藉由X光單晶繞射分析鑑定,得到陰離子為四氯化鈷的錯合物[Pd3Cl2(bpnp)2][CoCl4]。 叁鈀金屬錯合物[{Pd3Cl2(bpnp)2}Cl2]對於芳香族硼酸衍生物的水解,具有催化性質。相較於文獻報導以鈀金屬催化硼酸衍生物的探討,主要是以芳香族偶合的產物為主。但在我們的研究中,觀察到只有少量的偶合產物,主要以芳香酚或芳香還原產物。特別的是當使用4-甲氧基苯硼酸為試劑時,得到的是發生遷移的3-甲氧基苯酚。論文亦對於一系列的芳香族硼酸試劑,做一系統分析討論。
2,7 –Bis(2-pyridyl)-1,8-naphthyridine (bpnp) is a multiple pyridinyl nitrogen donor, which is capable of binding with metal ions in a chelating manner. In case of coordination with two metal ions, these centers are in close distance to have metal-metal interactions, which raises a subject of considerable interest. In our work, we tried to synthesize the dipalladium complex with bpnp. Indeed, we have successfully obtained a palladium complex chelated with bpnp, but in a trimetallic form. The structure of the complex is revealed by X-ray single crystal analysis. For the first time, a mixed valence tripalladium species is constructed from the complexation of Pd(0), Pd(II) and bpnp. Detail structural formulation via X-ray diffraction analysis confirms the coordination mode. This tri-palladium complex was found to have catalytic activity on hydroxylation or reduction of phenylboronic acids