Liang Yongmin

Characterization and crystal structure of formylferrocenyl norbornenoyl hydrazone complexes with bivalent metals

Abstract Condensation of formylferrocene with bicyclo[2.2.1]hept-5-ene-2-carboxylic acid hydrazide yields a new ligand, formylferrocenyl-2-(5-norbornenoyl) hydrazone (HFfnh). Its cobalt(II), nickel(II), copper(II) and mercury(II) complexes were prepared. The ligand HFfnh acts as a uninegative bidentate organometallic ligand (ON). The crystal structure of the nickel(II) complex, Ni(Ffnh) 2 (C 38 H 38 N 4 O 2 Fe 2 Ni), has been determined by X-ray diffraction and shows that the nickel is in square planar coordination.

ACYLFERROCENE 2-FUROYL HYDRAZONES AND THEIR TRANSITION METAL(II) COMPLEXES

A series of new coordination complexes of Mn-II, Co-II, Ni-II, Cu-II and Hg-II with the new hydrazones derived from formylferrocene and/or acetylferrocene and 2-furoyl hydrazide have been synthesized and characterized by elemental analyses,electrical conductance, IR spectra, H-1 NMR spectra and TGA thermal analyses. These organometallic compounds act as uninegative bidentate (NO) ligands in the complexes. The IR spectra of the complexes reveals that the oxygen in the furyl ring does not participate in coordination. The complexes in DMF are non-electrolytes.

Lanthanide Complexes of Formylferrocene Salicylhydrazone

Abstract The complexes of formylferrocene salicylhydrazone (H2L) with some lanthanides, Ln(NaL)3·1-2H2O (1)(Ln = La, Nd, Dy, Er and Yb), and, Ln(L)Cl·1-2H2O (2) (Ln = La, Nd, Pr, Dy and Ho), have been prepared. The data of elemental analyses, UV, IR, 1H NMR, molar conductance and TGA show that the ligand coordinates to the central ions in the enolic form with a mole ratio of 3: 1 in complexes (1) and of 1: 1 in complexes (2). Referee I: L. Brammer Referee II: J. R. Morrow

ACETHYLFERROCENE-2-THENOYLHYDRAZONE COMPLEXES WITH TRANSITION METAL IONS

Complexes of acetylferrocene-2-thenoylhydrazone with Cu(II), Ni(II), Co(II) and Hg(II) have been prepared and characterized by elemental analyses, IR, NMR, electronic spectra, ESR, molar conductivity and thermal analyses. All results show that the ligand coordinates to the metal ion through the enolic oxygen and the azomethine nitrogen atoms as a bidentate donor.

Metal(II) Complexes of 1,1′-Diacetylferrocene-Bis(4-Phenylthiosemicarbazone)

Abstract A new ligand, 1,1′-diacetylferrocene-bis(4-phenylthiosemicarbazone) (H2Dafpt) and some of its transition metal(II) complexes have been prepared. The complexes were characterized by elemental analyses, IR, NMR, electronic spectra, molar conductivities, magnetic moments and thermal analyses. Dafpt2− coordinates to the metal ion with two thio-enol groups and acts as a tetradentate.

The Complexes of Dichlorobis(Dicarbonyl-π-Cyclopentadienyliron)Tin(IV) with Schiff Bases

Abstract Seven new complexes, [π-C5H5Fe(CO)2]2 SnL (H2L = some semi-and thiosemicarbazones) have been synthesized. These complexes have been characterized by elemental analyses, molar conductivities, IR and 1H NMR spectra. It is shown that these ligands are tridentate and coordinate to the tin ion in the enol form. The coordination number of the central tin ion equals to five and we suggest that these complexes have a trigonal bipyramidal structure.

LANTHANIDE ION COMPLEXES OF A LIGAND DERIVED FROM SALICYLALDEHYDE AND MALONYL DIHYDRAZONE

Abstract The chelates Na2[Ln(C34H28N8O8)Cl]·nH2O of the malonyl dihydrazone of salicylaldehyde with the lanthanides have been prepared and characterized by elemental analysis, IR, UV, molar conductance and TGA. It is shown that the ligand coordinates to the central ion with one hydrazone unit in the keto form and one chloride ion participates in coordination to the metal ion. These chelates are 1:2 electrolytes in DMF and are more thermostable than their ligand due to the formation of chelate rings.

Ferrocenyl Thtosemicarbazones and Their Transition Metal Complexes

Abstract Two new ligands, l-acetoacetyl-ferrocene-4-phenylthiosemicarba-zone, Fc(CO)CH2C(CH3) = N-NHCSNHPh (HAafpt), 1-acetoacetylfer-rocene-4-(α-naphthyl)thiosemicarbazone, Fc(CO)CH2C(CH3) = NNHCS-NHC10H7 (H2Aafnt) and their transition metal(II) complexes have been prepared and characterized by elemental analyses, molar conductivities, magnetic moment, IR, PMR, UV and thermal analyses. It is shown that the ligands HAafpt and H2Aafnt coordinate to the central ions in different forms and we suggest their plausible structure.