NMR STUDIES ON 4,5-DIAZAFLUORENE-9-ONE 2-NAPHTHOYLHYDRAZONE (HL) AND ITS COMPLEX PbL2

Chinese Journal of Magnetic Resonance ›› 2000, Vol. 17 ›› Issue (4): 265-269.

NMR STUDIES ON 4,5-DIAZAFLUORENE-9-ONE 2-NAPHTHOYLHYDRAZONE (HL) AND ITS COMPLEX PbL₂

XIAO Wen^1,2, LU Zhonglin^1,2, SU Chengyong¹, LIU Hanqin¹, KANG Beisheng¹

1. School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275;
2. State Key Laboratory of Organometallic Chemistry, Shangh Institute of Organic Chemistry, The Chinese Academy of Sciences, Shanghai 200032

Received:2000-05-24 Revised:2000-06-12 Published:2000-08-05 Online:2018-01-11

Abstract

Abstract: 4,5-Diazafluorene-9-one 2-naphthoylhydrazone (HL) and its complex PbL₂ 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.

Key words: 4,5-Diazafluorene-9-one 2-naphthoylhydrazone, ¹H NMR, ¹H-¹H COSY, Enol form, Shielding effect

XIAO Wen, LU Zhonglin, SU Chengyong, LIU Hanqin, KANG Beisheng. NMR STUDIES ON 4,5-DIAZAFLUORENE-9-ONE 2-NAPHTHOYLHYDRAZONE (HL) AND ITS COMPLEX PbL₂[J]. Chinese Journal of Magnetic Resonance, 2000, 17(4): 265-269.

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NMR STUDIES ON 4,5-DIAZAFLUORENE-9-ONE 2-NAPHTHOYLHYDRAZONE (HL) AND ITS COMPLEX PbL₂

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