4,5-Diazafluorene-9-one Acylhydrazones and Their Lead(II) Complexes and the Crystal Structure of Hydrated 4,5-Diazafluorene-9-one 3-Methoxybenzoylhydrazone Supported by Extensive Hydrogen Bonds and Aromatic Ring Stacking Interactions

• Autorzy: Xiao W. , Lu Z. L. , Deng L. Y. , Su C. Y. , Tong Y. Z. , Liu H. Q. , Kang B. S.
• Języki publikacji: EN

Abstrakty

EN

4,5-Diazafluorene-9-one acylhydrazone ligands: 4,5-diazafluorene-9-one 3-methoxy benzoylhydrazone (HL1), 4,5-diazafluorene-9-one 2-thiopheneacetylhydrazone (HL2) and 4,5-diazafluorene-9-one isonicotinoylhydrazone (HL3) and their Pb(II) complexes PbL1 2 x 2H2O 1, PbL2(OAc) 2 and PbL3 2 have been prepared and characterized by elemental analyses, molar conductivities, IR and 1H NMR spectroscopy. In all the complexes, the mononegative ligand chelates to the lead ion through the enolic oxygen and the azomethine nitrogen atoms forming a 5-membered chelate ring. An X-ray diffraction analysis on HL1x2H2O shows that it exists in the keto form and each HL1 molecule forms five hydrogen bonds with neighbouring four water molecules through two diazafluorene N, one carbonyl O, one azomethine N and one amide H atom. The hydrogen bonds together with aromatic pi...pi stacking interactions between the phenyl and the diazafluroene ring and between the diazafluorene rings assemble the molecules into a two-dimensional network.

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2000
• Tom: Vol. 74, nr 9
• Strony: 1211--1221
• Opis fizyczny: Bibliogr. 35 poz., rys.

Twórcy

autor

Xiao W.

autor

Lu Z. L.

autor

Deng L. Y.

autor

Su C. Y.

autor

Tong Y. Z.

autor

Liu H. Q.

autor

Kang B. S.