TITLE

Oxo-rhenium(V) complexes with 8-hydroxyquinoline derivatives

AUTHOR(S)
Sigouin, Olivier; Beauchamp, André L.
PUB. DATE
May 2005
SOURCE
Canadian Journal of Chemistry;May2005, Vol. 83 Issue 5, p460
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Compounds of the types ReOCl2(L)(PPh3) and ReOCl(L)2 were prepared by reacting ReOCl3(PPh3)2 with 8-hydroxyquinoline (HL) and its 2-methyl, 2-chloro, 5-chloro, 5-nitro, 5,7-dichloro, 5,7-dibromo, and 5,7-diiodo derivatives. With the bulky 2-phenyl-8-hydroxyquinoline, only ReOCl2(L)(PPh3) could be isolated, whereas the still bulkier 2-tert-butyl derivative did not react. For ReOCl2(L)(PPh3), the coordination of the quinoline oxygen trans to the Re=O bond and the cis-dichloro arrangement in the equatorial plane were established from crystallographic studies on the 2-chloro and the 5,7-dibromo complexes. From the combined data for these various derivatives, the 1H NMR signals could be fully assigned. With both series of compounds, a complex d–d absorption pattern is observed in the visible spectra, corresponding to the excitation of a d electron from the interaxial d orbital in the equatorial plane to the empty dxz and dyz orbitals, which are inequivalent in these low-symmetry systems. Deconvolution revealed the presence of two very weak low-energy components (~10 000 and ~12 000 cm–1), which are assigned to the two expected singlet–triplet transitions, whereas two stronger bands at higher energy (~14 000 and ~17 000 cm–1) originate from the two singlet–singlet transitions. These bands are not substantially displaced by substitution on the 8-hydroxyquinoline rings.
ACCESSION #
17191351

 

Related Articles

  • Vaporization Behavior and Thermodynamic Properties of K2O-GeO2 Melts Studied by Mass Spectrometry. Shornikov, S. I. // Inorganic Materials;Dec2005, Vol. 41 Issue 12, p1345 

    The vaporization behavior and thermodynamic properties of K2O-GeO2 melts are studied by Knudsen cell mass spectrometry in the range 950–1550 K. The vapor composition over the melts indicates that their vaporization behavior is governed by reactions characteristic of oxides and is...

  • Gaseous Associates over Oxide Materials. Lopatin, S.; Shugurov, S.; Semenov, G. // Inorganic Materials;Dec2005, Vol. 41 Issue 12, p1340 

    The formation of associates in the vapor phase over a mixed oxide is analyzed in relation to the difference in acid-base properties and volatility between its constituent oxides. A method is proposed for assessing the standard enthalpy of formation of gaseous oxy salts. Experimentally determined...

  • Vaporization Products of Transition-Metal and Rare-Earth Complex Fluorides Studied by High-Temperature Mass Spectrometry. Leskiv, M. S.; Abramov, S. V.; Oleinik, L. I.; Kepman, A. V.; Sukhoverkhov, V. F.; Mazej, Z.; Rau, D. V.; Chilingarov, N. S.; Sidorov, L. N. // Inorganic Materials;Dec2005, Vol. 41 Issue 12, p1327 

    Gaseous products of the thermal decomposition of Ni(IV), Tb(IV), Mn(IV), and Pt(IV) complex fluorides were studied by high-temperature mass spectrometry. The results demonstrate that the decomposition of potassium hexafluoronickelate and potassium heptafluorotherbate is accompanied by atomic...

  • Inorganic chemistry: Uranium gets a reaction. Boncella, James M. // Nature;1/17/2008, Vol. 451 Issue 7176, p250 

    The article reports on the research on the chemical reaction of uranium. The authors of the study have describe a reaction of uranyl ions, the most common from of uranium in solution, in which they used a flexible ligand to simultaneously bind a uranyl ion and two potassium ions. It is will...

  • Reactivity of Triphenylmethyl and Triphenylgermyl Derivatives of Lanthanides. Zhil'tsov, S. F.; Makarov, V. M.; Semkina, N. E. // Russian Journal of General Chemistry;Sep2003, Vol. 73 Issue 9, p1395 

    Reactions of bis(triphenylmethyl)ytterbium and bis(triphenylgermyl)ytterbium with mercuric chloride, triphenylbismuth, iodine, tert-butyl alcohol, phenylacetylene, and cyclopentadiene were studied. The higher reactivity of the former compound in these reactions is explained by that the chemical...

  • Thermal Dissociation of RMnO3 (R = Dy, Yb, Lu). Vedmid', L.; Balakirev, V.; Yankin, A.; Golikov, Yu. // Inorganic Materials;Dec2005, Vol. 41 Issue 12, p1357 

    The phase equilibria involved in the thermal dissociation of RMnO3 (R = Dy, Yb, Lu) were studied in the range 973–1173 K by a static method in a vacuum circulation unit and by x-ray diffraction analysis of quenched solid phases. The RMnO3 manganites were shown to dissociate by the...

  • Counter-ion effect in the nucleophilic substitution reactions at silicon: a G2M(+) level theoretical investigation. Yi Ren; Xin Wang; San-Yan Chu; Ning-Bew Wong // Theoretical Chemistry Accounts: Theory, Computation, & Modeling;Apr2008, Vol. 119 Issue 4, p407 

    Three identity nucleophilic substitution reactions at tetracoordinated silicon atom with inversion and retention pathways: Nu + SiH3Cl → Nu + SiH3Cl[Nu = (1)Cl−, (2) LiCl, and (3) (LiCl)2], are investigated using the G2M(+) theory. Our results show that changing the nucleophile can...

  • inorganic chemistry.  // American Heritage Student Science Dictionary;2009, p182 

    A definition of the term "inorganic chemistry" is presented. It refers to the branch of chemistry that deals with inorganic compounds.

  • CONTROL SYSTEM OF KNOWLEDGES ON INORGANIC CHEMISTRY AT CHEMISTRY DEPARTMENT OF MOSCOW STATE LOMONOSOV UNIVERSITY. GRIGORIEV, A. N.; ERYOMINA, E. A.; KAZIN, P. E.; TRETYAKOV, Yu. D. // Izvestiya Vysshikh Uchebnykh Zavedenii. Seriya Khimiya i Khimich;2012, Vol. 55 Issue 10, p117 

    The article deals with the development of rating system of student results acting at the Department of Inorganic Chemistry, Chemical Faculty of Moscow State University from 1989 This system helps students to more efficiently distribute their forces during the school year, encourage them to a...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics