0000000000266269
AUTHOR
Paula Brandão
Ligand mediated structural diversity of copper(II)-azido moiety: Synthesis, structure and magnetic study
Abstract Two copper azido complexes [Cu4(L1)4(µ1,1-N3)3(N3)] (1) and [{Cu2(L2)(N-benzylen)(µ1,1-N3)3(µ1,1,3-N3(N3)]n (2) have been synthesized by the reaction of aqueous solution of sodium azide to a methanolic solution of copper perchlorate hexahydrate and corresponding Schiff-base ligands. Schiff bases HL1 and HL2 act as blocking coligands are derived from the 1:1 condensation of N-benzyl ethylenediamine with Salicyldehyde and 2-hydroxy-5-chloroacetophenone respectively (N-benzylen is the N-benzyl ethylenediamine). These two complexes are characterized by the elemental analysis, FT-IR, single crystal X-ray diffraction, powder XRD and also TGA. Single crystal X-ray structural study reveals…
Azido and thiocyanato bridged dinuclear Ni(II) complexes involving 8-aminoquinoline based Schiff base as blocking ligands: Crystal structures, ferromagnetic properties and magneto-structural correlations
Abstract The use of two 8-aminoquinoline-based tridentate N3-donor rigid Schiff base ligands (L1 and L2) with Ni(II) in the presence of the pseudohalides, NaN3 and NaSCN results in the crystallization of the two novel Ni(II) dimers: [Ni2(L1)2(µ1,1′-N3)2(N3)2] (1) and [Ni2(L2)2(µ1,3-NCS)2(NCS)2] (2). Both complexes are centrosymmetric Ni(II) dimers where the Schiff base ligands coordinate the octahedral Ni(II) centres in a mer configuration with one terminal and two bridging pseudohalide ligands in the remaining positions. Complex 1 shows Ni(II) ions connected by a double µ1,1′-N3− bridge whereas in complex 2 the Ni(II) ions are connected by a double µ1,3-NCS− bridge. The magnetic properties…
A Trinuclear Copper(II) Cryptate and Its μ3-CO3 Cascade Complex: Thermodynamics, Structural and Magnetic Properties
The 2,4,6-triethylbenzene-capped hexaamine macrobicycle with pyridyl spacers (pyr) was able to coordinate three copper(II) ions within its cavity. Potentiometric studies performed at 298.2 K in MeOH/H(2)O (50:50 v/v) and at ionic strength 0.10 mol dm(-3) in KNO(3) revealed that trinuclear species predominate in solution from pH 5.0, the hydroxo complexes being the main species, which start forming at unusual very low pH values. The single-crystal X-ray determination of the trinuclear complex showed that the three copper centres have square-planar geometry, arranged in an almost equilateral triangle, and have carbonate bridging the three metal centres. The presence of carbonate resulted from…
Synthesis and characterization of a novel dicyanamide-bridged Co(II) 1-D coordination polymer with a N 4 -donor Schiff base ligand
The synthesis, structure and magnetic properties of a novel Co(II) 1D coordination polymer, [Co(L)(µ1,5-dca)(ClO4)2·MeOH]n (1) are described. Compound 1 contains two independent cationic Co(II) chains (CoA and CoB) which are parallel to the c direction and present short π-π and C-H⋯π interactions with two neighbouring chains along the b direction, giving rise to alternating layers of chains A and B in the bc plane. Variable-temperature magnetic susceptibility measurements shows a weak antiferromagnetic coupling among the adjacent cobalt(II) centres mediated through μ1,5-dca− bridge.
Multifunctional Ni(II)-Based Metamagnetic Coordination Polymers for Electronic Device Fabrication
The combination of two 8-aminoquinoline-based Schiff base ligands (L1 and L2) with SCN– and Ni(II) has led to the synthesis of two new one-dimensional thiocyanato-bridged coordination polymers: [Ni...
CCDC 1478367: Experimental Crystal Structure Determination
Related Article: Saikat Banerjee, Sattwick Halder, Paula Brandão, Carlos J. Gómez García, Samia Benmansour, Amrita Saha|2017|Inorg.Chim.Acta|464|65|doi:10.1016/j.ica.2017.04.056
CCDC 1936484: Experimental Crystal Structure Determination
Related Article: Pravat Ghorai, Arka Dey, Paula Brandão, Samia Benmansour, Carlos J. Gómez García, Partha Pratim Ray, Amrita Saha|2020|Inorg.Chem.|59|8749|doi:10.1021/acs.inorgchem.0c00389
CCDC 1936483: Experimental Crystal Structure Determination
Related Article: Pravat Ghorai, Arka Dey, Paula Brandão, Samia Benmansour, Carlos J. Gómez García, Partha Pratim Ray, Amrita Saha|2020|Inorg.Chem.|59|8749|doi:10.1021/acs.inorgchem.0c00389
CCDC 1918388: Experimental Crystal Structure Determination
Related Article: Pravat Ghorai, Paula Brandão, Samia Benmansour, Carlos J. Gómez García, Amrita Saha|2020|Polyhedron|188|114708|doi:10.1016/j.poly.2020.114708
CCDC 1918387: Experimental Crystal Structure Determination
Related Article: Pravat Ghorai, Paula Brandão, Samia Benmansour, Carlos J. Gómez García, Amrita Saha|2020|Polyhedron|188|114708|doi:10.1016/j.poly.2020.114708