Row Transition Metal Ions Research Articles

Acetone picolinoyl hydrazone complexes of some first row transition metal ions

Acetone picolinoyl hydrazone (APH) complexes of the types M(APH)Cl2nEtOH and M(APH-H)22EtOH (where M = manganese(II), iron(II), cobalt(II), nickel(II), or copper(II); n = 0 or 2) have been prepared and their nature and structures studied by molar conductance, molecular weight determination, thermal degradation, magnetic susceptibility, electronic and i.r. spectral measurements. Spin-free octahedral geometry has been proposed for all the complexes except Mn(APH)Cl2 and Co(APH)Cl2 for which tetrahedral geometry has been suggested.

Nicotinoyl hydrazide complexes of some first row transition metal ions

Nicotinoyl hydrazide, L, complexes of the MLCl2 · n EtOH type [M = manganese(II), iron(ll), cobalt(II), nickel(II) and copper(II); n = 0 or 1], WL2) (NO3)2 [M = cobalt(II) and nickel(II)] and mixed metal complexes such as HgCo2 L2 Cl6 and (NiL2)HgI4 have been prepared and their nature and structure studied by molar conductance, magnetic susceptibility, electronic, e.s.r. and i.r. spectral measurements. Octahedral structures have been proposed for all the complexes except MnLCl2, CoLCl2 and HgCo2 L2 C16 for which tetrahedral geometry is suggested.

Isolation of trioxodinitrato(II) complexes of some first row transition metal ions

High-spin, heat- and light-sensitive tris[trioxo-dinitrato(II)] complexes of Mn2+, Fe2+, Co2+, Ni2+, and Fe3+ have been isolated using the [Co(NH3)6]3+ ion as a large counterion.

First-row transition metal complexes with 2-benzoylpyridine

The interaction of 2-benzoylpyridine with first row transition metal ions is studied in organic solvents and in the solid state. The isolated complexes are characterized by elemental analyses, magnetic susceptibility, conductivity measurements, IR spectra and UV-vis electronic spectra. It is found that 2-benzoylpyridine acts either as mono- or as a bidentate agent, depending on such factors as the halide used (Cl − or Br −), the solvent and adduct formation between the complex and HCl or HBr. In the case of the Co(II) complexes studied, opening of the chelate ring is accompanied by a change from an octahedral to a tetrahedral arrangement. In all the other cases the complexes are octahedral. Aspects of the results that might have mechanistic implications are pointed out.

Optical and magnetic properties of some transition metal ions in lithium phosphate glass

In lithium phosphate glass doped with first row transition metal ions it appears that the various transition metal ions possess normal oxidation states; Cr 3+, Mn 3+, Fe 2+ and Fe 3+, Co 2+, Ni 2+ and Cu 2+. The room temperature and 77°K spectra for Cr 3+, Mn 3+, Fe 2+.3+, Ni 2+ and Cu 2− containing glasses can be interpreted on the basis of octahedrally coordinated metal ions, while the spectrum of the Co 2+ glass correlates with a tetrahedrally coordinated metal ion. The magnetic moments for the Mn 3+, Fe 2+.3+, Co 2+, Ni 2+ and Cu 2+ are all of the order of the spin only values. The magnetic moment for the Cr 3+ containing glass is somewhat lower than the spin only value.

A study of the weak fluoride complexes of the divalent first row transition metal ions with a fluoride ion-selective electrode

The fluoride complexes of the divalent ions of the first row transition elements from manganese to zinc have been studied potentiometrically with a fluoride ion-selective electrode. One complex, MF(aq) + was detected in each case and all complexes are shown to be very weak. The stability constants of the complexes are reported at an ionic strength of one, and at 25°C.

Absorption Spectra of First Row Transition Metal Ions in Phosphate Glasses

Journal of the American Ceramic SocietyVolume 52, Issue 1 p. 52-52 Absorption Spectra of First Row Transition Metal Ions in Phosphate Glasses J. C. HADDON, J. C. HADDONSearch for more papers by this authorE. A. ROGERS, E. A. ROGERSSearch for more papers by this authorD. J. WILLIAMS, D. J. WILLIAMSSearch for more papers by this author J. C. HADDON, J. C. HADDONSearch for more papers by this authorE. A. ROGERS, E. A. ROGERSSearch for more papers by this authorD. J. WILLIAMS, D. J. WILLIAMSSearch for more papers by this author First published: January 1969 https://doi.org/10.1111/j.1151-2916.1969.tb12661.xCitations: 38 The writers are at the School of Chemistry, University of Bradford, Bradford 7, England. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume52, Issue1January 1969Pages 52-52 RelatedInformation

Bis(pyrazyl)alkane complexes of copper (I), copper (II), rhodium (I) and ruthenium (II)

Bis(pyrazyl)alkane ligands readily form complexes with both the copper (I) and copper (II) species but are reluctant to react with other first row transition metal ions. Reaction with the heavier transition metal ions is however more facile and complexes of rhodium (I) and ruthenium (II) are described. These complexes are very stable towards oxidation by air. The electronic spectra and magnetism of these complexes are reported and discussed. Some interesting charge transfer bands are observed.

Metal complexes of 1,10-phenanthroline derivatives. I. Bis complexes of 2-Carboxy-1,10-phenanthroline with first row transition metal ions

2-Carboxy-1,10-phenanthroline has been prepared by brominating 2- methyl-phenanthroline and then hydrolysing in acidic solution the resultant 2-tribromomethyl derivative. The acid acts as a tridentate chelating agent and six-coordinate inner complexes of manganese(II), iron(II), cobalt(II), nickel(II), copper(II), and zinc(II) as well as a complex of iron(III) are described. The formulation of the complexes as six-coordinate is supported by their magnetic and spectral properties. The temperature dependence of the magnetism of the iron(II) complex indicates that the complex is a simple paramagnetic.

Some coordination compounds of 2-(salicylideneaminomethyl)pyridine

Complexes of a new tridentate Schiff base, 2-(salicylidenaminomethyl)pyridine, with some first row transition metal ions have been isolated and characterized. Analytical, spectral, and magnetic data, which support hexacoordination for the iron(III), cobalt(II), nickel(II) and zinc(II) complexes and quinquecoordination for the copper (II) complex, are presented. It has also been shown that the cobalt (II) complex, when exposed to air, irreversibly absorbs one mole of elemental oxygen per mole of complex.