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本文利用逐级配体取代反应,合成了一系列六个含有 dppm、dppe 的混合配体零价钯配合物,[(L_2)pd(L_2′)](L_2′分别为双苄叉酮(PhCH=CHCOCH=CHPh,dba),2,3,5,6,-四氟-1,4-对苯醌(PQ)和2,3-二氯-1,4-对萘醌(PnQ);L_2分别为 dppm(dppm=Ph_2PCH_2CH_2PPh_2),dppe(dppe=Ph_2PCH_2 CH_2PPh_2)]。通过元素分析、红外光谱,电子光谱以及′H-NMR 和~(31)P-NMR 谱对这些配合物进行了表征。结果表明 dppm 和 dppe在这些配合物中都起双齿配体的作用,二者的配位行为相同。配体 dba,PQ 和 PnQ分别利用其-C=C-双键与 Pd 原子进行配位。
In this paper, a series of six zero-valent palladium complexes containing dppm and dppe were synthesized by step-by-step ligand substitution reaction. [L 2 ’] (L_2’ = CHCOCH = CHPh, dba), 2,3,5,6-tetrafluoro-1,4-p-benzoquinone (PQ) and 2,3-dichloro- (Dpp = Ph_2PCH_2CH_2PPh_2) and dppe (dppe = Ph_2PCH_2CH_2PPh_2) respectively. These complexes were characterized by elemental analysis, IR, EDS and ~ (31) P-NMR spectra. The results showed that both dppm and dppe act as bidentate ligands in these complexes, and their coordination behaviors are the same.The ligands dba, PQ and PnQ respectively coordinate with Pd atom through their C═C double bonds.