Complexes of 4-cyanopyridine N-oxide

doi:10.1016/0022-1902(69)80382-9

Journal of Inorganic and Nuclear Chemistry

Volume 31, Issue 6, June 1969, Pages 1671-1678

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Abstract

4-Cyanopyridine N-oxide has been incorporated as a ligand in nine new complexes spanning the six metal ions VO²⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, and Cd²⁺. Its strength as a ligand, which is greatly weakened by the strong electron withdrawing capacity of the para cyano group, appears to fall between F⁻ and Cl⁻ on the stronger side and Br⁻ and ClO₄⁻ on the weaker side, at least towards VO²⁺. The new complexes have been characterized by their i.r. and visible-u.v. spectra, by conductance, and by magnetic susceptibility. The stoichiometries of the VO²⁺ complexes appear to be controlled by the anions present, and the Cu²⁺ complex is most likely a dimer.

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Cited by (5)

Synthesis, crystal structure and magnetic properties of dinuclear manganese(II) diketonate with cyanopyridine-N-oxide bridging ligands [Mn(hfac)<inf>2</inf>(4-cpyNO)]<inf>2</inf>
2004, Polyhedron
The reaction of Mn(hfac)₂ · 2H₂O (hfac, hexafluoroacetylacetonate anion) with 4-cpyNO (4-cyanopyridine-N-oxide) in chloroform results in the formation of a novel mixed-ligand complex [Mn(hfac)₂(4-cpyNO)]₂. X-ray single crystal structure revealed the presence of dinuclear molecules [Mn(hfac)₂(4-cpyNO)]₂. Within the dimer, two manganese(II) ions are in an octahedral environment and are bridged by two 4-cpyNO ligands through oxygen atoms of the N-oxide groups. The magnetic properties of the compound were studied in the temperature range of 2–300 K. The interaction between Mn(II) ions was found to be weakly ferromagnetic with an exchange coupling constant J=0.23 cm⁻¹ in contrast to an antiferromagnetic interaction observed for most compounds with the Mn(II)(μ-O)₂Mn(II) bridging core. Some magneto-structural correlations are discussed.
Infrared and thermal investigations of thorium(IV) complexes of 4-cyanopyridine N-oxide
1985, Thermochimica Acta
Metal complexes of aromatic amine n-oxides
1973, Coordination Chemistry Reviews
Vanadium(III) perchlorate interactions with pyridine N-oxides
1970, Journal of Inorganic and Nuclear Chemistry
Redetermination of 4-cyanopyridine N-oxide
2012, Acta Crystallographica Section E: Structure Reports Online

^∗: On leave from Istituto di Chimica Generale, Universita di Perugia.

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Complexes of 4-cyanopyridine N-oxide

Abstract

Spectrochim. Acta

Spectrochim. Acta

J. inorg. nucl. Chem.

J. Am. chem. Soc.

J. Am. chem. Soc.

Chem. Ind.

Inorg. Chem.

J. Am. chem. Soc.

J. chem. Soc.