0000000001220063
AUTHOR
Sudeshna Saha
A ferromagnetic tetranuclear nickel(II) Schiff-base complex with an asymmetric Ni4O4 cubane core
Abstract The ferromagnetic tetranuclear nickel(II) complex [Ni4(L)4(CH3OH)2]·2MeOH·8H2O (1) has been synthesized by reacting nickel nitrate hexahydrate with the Schiff base ligand H2L (H2L = N-(2-hydroxyphenyl)-3-methoxy-salicylideneamine). Complex 1 was characterized by analytical, thermogravimetric, optical and magnetic techniques. The solid state structure of 1 was established by single crystal X-ray diffraction analysis. Crystal structure determination shows the formation of a distorted Ni4O4 cubane moiety encapsulated by four Schiff base ligands. Compound 1 crystallizes in the triclinic space group P 1 ¯ with a = 12.7624(9) A, b = 15.0477(9) A, c = 16.8589(10) A, α = 94.732(2)°, β = 94…
Co-crystallization of Keggin type polyoxometalates [HL]3[PW12O40] and [Ln(DMF)8][PW12O40] (Ln=La, Dy, Yb) (L=N-(2-hydroxyphenyl)-3-methoxy-salicylideneamine): Syntheses, structures and magnetic properties
Abstract Four new Keggin type polyoxometalate clusters [HL]3[PW12O40]·5MeOH (1) and [Ln(DMF)8][PW12O40] {Ln = La (2), Dy (3), Yb (4)} (L = N-(2-hydroxyphenyl)-3-methoxy-salicylideneamine) have been synthesized. Co-crystallization of complex 1 with each of the three complexes 2–4 takes place when the Schiff base ligand is treated with hydrated phosphotungstic acid, H3[PW12O40]·xH2O, hydrated lanthanide nitrate, Ln(NO3)3·6H2O in the presence of Ni(NO3)2·6H2O. The Schiff base ligand is protonated in complex 1 and thus it is neutralizing the charge of the polyoxotungstate anion, [PW12O40]3−. A dimethylformamide (DMF) coordinated trivalent lanthanide ion balances the negative charge of the polyo…
CCDC 968535: Experimental Crystal Structure Determination
Related Article: Hari Nayek, Sudeshna Saha, Souvik Pal, Carlos Gomez Garcia, Klaus Harms|2014|Polyhedron|74|1|doi:10.1016/j.poly.2014.02.036
CCDC 1419401: Experimental Crystal Structure Determination
Related Article: Sudeshna Saha, Partha P. Jana, Carlos J. Gómez-García, Klaus Harms, Hari Pada Nayek|2016|Polyhedron|104|58|doi:10.1016/j.poly.2015.11.035
CCDC 1419400: Experimental Crystal Structure Determination
Related Article: Sudeshna Saha, Partha P. Jana, Carlos J. Gómez-García, Klaus Harms, Hari Pada Nayek|2016|Polyhedron|104|58|doi:10.1016/j.poly.2015.11.035
CCDC 1419402: Experimental Crystal Structure Determination
Related Article: Sudeshna Saha, Partha P. Jana, Carlos J. Gómez-García, Klaus Harms, Hari Pada Nayek|2016|Polyhedron|104|58|doi:10.1016/j.poly.2015.11.035
CCDC 1419403: Experimental Crystal Structure Determination
Related Article: Sudeshna Saha, Partha P. Jana, Carlos J. Gómez-García, Klaus Harms, Hari Pada Nayek|2016|Polyhedron|104|58|doi:10.1016/j.poly.2015.11.035