74-11-3, Name is 4-Chlorobenzoic acid, molecular formula is C7H5ClO2, HPLC of Formula: https://www.ambeed.com/products/74-11-3.html, belongs to chlorides-buliding-blocks compound, is a common compound. In a patnet, author is Kanizaj, Lidija, once mentioned the new application about 74-11-3.
The heterodimetallic [CuFe] compounds [Cu-4(II) (terpy)(4)Cl-5]-[Fe-III(C2O4)(3)]center dot 10H(2)O (1;terpy = 2,2′:6′,2 ”-terpyridine), [Cu-2(II)-(H2O)(2) (terpy)(2) (C2O4)][(CuFeIII)-Fe-II (CH3OH)(terpy)(C2O4)(3)](2) (2), and {[(Cu2FeIII)-Fe-II (H2O)(terpy)(2) (C2O4)(7/)(2)]center dot 6H(2)O}(n) (3) were obtained using building block approach, from reaction of aqueous solution of [Fe(C2O4)(3)](3-) and a methanol solution containing Cu2+ ions and terpy by the layering technique. Interestingly, by changing only the anion of the starting salt of copper(II), Cu(NO3)(2)center dot 3H(2)O instead of CuCl2 center dot 2H(2)O, an unexpected change in the type of bridge, oxalate (2 and 3) versus chloride (1), was achieved, thus affecting the overall structural architecture. Two polymorphs of 3D coordination polymer [(CuFe2II)-Fe-II(H2O)(terpy)(C2O4)(3)](n) (4), crystallizing in the triclinic (a) and monoclinic (b) space groups, were formed hydrothermally, depending on whether CuCl2 center dot 2H(2)O or Cu(NO3)(2)center dot 3H(2)O was added 3 to the water, besides K-3[Fe(C2O4)(3)]center dot 3H(2)O and terpy, respectively. Under hydrothermal conditions iron(III) from initial building block is reduced to the divalent state, creating 2D honeycomb [Fe-2(II)(C2O4)(3)](n)(2n-)- layers, which are bridged by [Cu(H2O)(terpy)](2+) cations. Compounds were investigated by single-crystal X-ray diffraction, IR, and impedance spectroscopies, magnetization measurements, and density functional theory (DFT) calculations. In compounds 1 and 2, OD magnetism is observed, with 1 having a ground-state spin of 1 due to different interactions through chloride bridges of Cu2+ ions in tetramer [Cu-4(II)(terpy)(4)Cl-5](3+) and 2 showing strong antiferromagnetic coupling of Cu2+ ions mediated by oxalate ligand in [Cu-2(II)(H2O)(2)(terpy)(2)(C2O4)](2+) and weak ones between Cu2+ and Fe3+ ions through oxalate bridge in [(CuFeIII)-Fe-II(CH3OH)(terpy)(C2O4)(3)](-). Polymer 4 exhibits antiferromagnetic phase transition at 25 K: The [Fe-2(II)(C2O4)(3)](n)(2n-) layers are antiferromagnetically ordered, and a small amount of interlayer interaction is transferred through [Cu(H2O)(terpy)](2+) cations via O-ox-Cu-O-ox bridges. Additionally, compounds 1 and 2 are electrical insulators, while 4a and 4b show proton conductivity.
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Reference:
Chloride – Wikipedia,
,Chlorides – an overview | ScienceDirect Topics