Song Qing-bao

N-Ferrocenylcarbonyl-N′-benzoylhydrazine and its transition metal(II) complexes

SummaryA new ferrocene derivative, N-ferrocenylcarbonyl-N′-benzoylhydrazine (H2FB) and its transition metal complexes, [M(FB)]2·H2O (M = MnII, CoII, CuII, ZnII, CdII or HgII) and M(HFB)2·nH2O (M = MnII or CdII) were prepared by reacting H2FB with the metal(II) acetates and characterized by elemental analyses, i.r. and u.v. spectroscopy and t.g.a. H2FB appears to act as a tetradentate ligand, coordinating to the metal through the nitrogen enolic oxygen atoms.

Formylferrocene 2-thenoyl hydrazone and its bivalent transition metal complexes

Abstract The new ligand, formylferrocene 2-thenoyl hydrazone (HFfth) and some of its bivalent transition metal complexes have been prepared. The complexes were characterized by elemental analyses, molar conductivities, IR, NMR, UV, ESR and thermal analyses. In all the complexes, the ligand acts as bidentate donor coordinating to the metal ion via the azomethine nitrogen and enolic oxygen. The redox properties of the complexes have been studied by cyclic voltammetry.

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.

CHELATE COMPLEXES OF FORMYLFERROCENE AND ACETYLFERROCENE SALICYLHYDRAZONE WITH TRANSITION METALS

Abstract Two new ligands, formylferrocene salicylhydrazone (H2L1), acetylferrocene salicylhydrazone (H2L11) and 12 transition metal(II) complexes, M(HL)2·O-1H2O [M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II), UO2(II) and Mn(II)] have been prepared by the reaction of H2L with metal(II) acetate in EtOH-DMF. Elemental analyses, IR, UV, NMR and molar conductance show that the ligands coordinate to metal ions in the enol form. The ligands act as bidentates and their 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.

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.

Norbornenyl Aroylhydrazones and Their Copper (I) and Mercury (I) Complexes

Abstract Seven new aroyl hydrazones containing the norbornene group and their copper (I) and mercury (I) complexes have been synthesized and characterized by elemental analyses, electrolytic conductance, IR spectra, 1H NMR spectra and TGA analyses. These ligands coordinate to metal ions in the enolic form and act as bidentate ligands. All complexes are non-electrolytes in methanol — N,N-dimethylformamide (3 : 1 in volume).

Transition Metal(II) Chelates of Schipp Bases that Include a Perrocenyl Group

Abstract Three new Schiff bases derived from 1-ferrocenyl-1, 3-butanedione with 2-aminoethanol, 2-aminophenol and 2-aminoacetic acid and their transition metal(II) chelates have been prepared. The data of their analyses, IR and PMR spectra, and molar conductivities of these chelates show that the ligands coordinate to central ions as a divalent tridentate by the formula ML (M = Cu(II) and Ni(II)) and as a monovalent biden-tate by that M(HL)2 (M = Co(II), Hg(II), and U02(II)).