4,5-二氮杂芴-9-酮2-萘甲酰腙(HL)及其配合物PbL_2的NMR研究(英文)

NMR STUDIES ON 4,5-DIAZAFLUORENE-9-ONE 2-NAPHTHOYLHYDRAZONE (HL) AND ITS COMPLEX PbL_2

本文报道了 4 ,5 二氮杂芴 9 酮 2 萘甲酰腙 (HL)及其配合物PbL2 的合成及其1H和1H 1HCOSYNMR表征 .在PbL2 中配体以烯醇式配位 ;由于受到亚胺氮孤对电子的屏蔽 。

Diazafluorene9one 2naphthoylhydrazone (HL) and its complex PbL\-2 have been prepared and characterized by \{\}\+1H and \{\}\+1H\{\}\+1H COSY NMR, which suggest that the ligand coordinates to the metal ion in the enol form. The diazafluorene protons of both compounds show interesting non equivalent chemical shifts resulted from the shielding effect of the lone pair of electrons on the azomethine N atom.