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• W3208232413 endingPage "115556" @default.
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• W3208232413 abstract "Similarities and differences between the structures of two solvates, heterometallic complex salts, [CuCl(phen) 2 ][Cu(H 2 O)(phen) 2 ][Cr(C 2 O 4 ) 3 ]· n H 2 O [ n = 5 ( 1 ) and n = 8 ( 2 ); phen = 1,10-phenanthroline] prepared using [Cr(C 2 O 4 ) 3 ] 3- as a building block were reported. The degree of trigonality, τ, was calculated for the copper(II) atoms in compounds 1 and 2 . In the presence of [NBu 4 ] + partial decomposition of the building block [Cr(C 2 O 4 ) 3 ] 3− occurred, and the homobinuclear oxalate-bridged complex [{Cu(bpy)Cl} 2 ( µ -C 2 O 4 )]·CH 3 OH ( 3 ; bpy = 2,2 ' -bipyridine) was formed. Compounds 1–3 were characterized by IR spectroscopy and single-crystal X-ray diffraction. Two heterometallic complex salts, as polymorphs of a solvate, consisting of three different mononuclear units, [CuCl(phen) 2 ][Cu(H 2 O)(phen) 2 ][Cr(C 2 O 4 ) 3 ]· n H 2 O [ n = 5 ( 1 ) and n = 8 ( 2 ); phen = 1,10-phenanthroline] were obtained in reactions in which [Cr(C 2 O 4 ) 3 ] 3− was used as a building unit. The polymorphs of a solvate are obtained in crystalline forms that differ in type or stoichiometry of included solvent molecules, mostly obtained under different conditions. In this [Cu II Cr III ] system, the used solvents and crystallization method influence the final product, i.e., the formation of a specific solvatomorph. From the reaction of an aqueous solution of K 3 [Cr(C 2 O 4 ) 3 ]·3H 2 O and acetonitrile solutions containing phen and CuCl 2 ·2H 2 O, compound 1 was formed when the layering technique is used; and compound 2 can be obtained from the mixture of these reactants, but using methanol instead of acetonitrile. Based on the index parameter for the degree of trigonality, τ , the geometry of copper(II) atoms of the [Cu(H 2 O)(phen) 2 ] 2+ cations in 1 and 2 are distorted from square pyramidal toward trigonal bipyramidal conformation, while those of [CuCl(phen) 2 ] + have a trigonal bipyramidal geometry. Interestingly, in the presence of [NBu 4 ] + cations, and applying slow liquid diffusion, partial decomposition of the building block [Cr(C 2 O 4 ) 3 ] 3− occurred and the homobinuclear oxalate-bridged complex [{Cu(bpy)Cl} 2 ( µ -C 2 O 4 )]·CH 3 OH ( 3 ; bpy = 2,2 ′ -bipyridine) was formed. Consequently, the oxalate ligand released from the coordination sphere of Cr III was coordinated to Cu II ions during the crystallization process. The obtained oxalate-based compounds 1 – 3 were characterized by IR spectroscopy and single-crystal X-ray diffraction." @default.
• W3208232413 created "2021-11-08" @default.
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• W3208232413 date "2022-01-01" @default.
• W3208232413 modified "2023-09-27" @default.
• W3208232413 title "Homo- and heterometallic oxalate-based complexes obtained using [Cr(C2O4)3]3− building block – Two polymorphs of a solvate" @default.
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• W3208232413 doi "https://doi.org/10.1016/j.poly.2021.115556" @default.
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