Structure and magnetic properties of the ferromagnetically coupled nickel dimer [Ni(terpy)(NCO)(H2O)]2(PF6)2 View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1988-10

AUTHORS

María I. Arriortua, Roberto Cortés, José L. Mesa, Luis Lezama, Teófilo Rojo, Gerard Villeneuve

ABSTRACT

The crystal structure of the dimeric [{Ni(C15H11N3)(NCO)(H2O)}2](PF6)2 has been determined by x-ray diffraction methods. Crystal data are as follows: P 1,a=11.904(4) Å,b=10.392(4) Å,c=8.531(3) Å, α=111.87(2)o, β=90.61(3)o, γ=107.37(5)o, U=926.7(4) Å3, Z=2, Dm=1.77(2), Dx=1.78 g. cm−3, μ(Mo-Kα)=12.1 cm−1, F(000)=494. Least-squares refinement of 1230 reflections with I≥1.5σ(1) gave a final R =0.035 (Rω=0.038). The structure is formed by cationic [{Ni(C15H11N3)(NCO)(H2O)}2]2+ and anionic PF6− units, linked through hydrogen bonds between the water molecule and the hexafluorophosphate ion. The resulting coordination geometry around each nickel(II) ion is ferragonally elongated octahedral. The N-bridging cyanate groups occupy simultaneously an equatorial position in the coordination sphere of one of the nickel atoms and an axial position in the other. The remaining axial positions are occupied by the water molecules. Powder susceptibility data, between 2.0 and 300 K, show the existence of ferromagnetic exchange between nickel centres. The magnetic parameters are J/K=6.6K, D/K =−17.6 K, z′J′/K=0.57 and g-2.21. More... »

PAGES

371-374

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01225130

DOI

http://dx.doi.org/10.1007/bf01225130

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030124093


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