0000000001300914
AUTHOR
Tatiana R. G. Simões
On the magneto-structural role of the coordinating anion in oxamato-bridged copper(ii) derivatives
We herein present the synthesis, spectroscopic analysis, description of the crystal structures and magnetic properties of four new complexes of the formula [{Cu(opba)(H2O)1.2}{Cu(dmphen)(SCN)}2]·dmf (1), [{Cu(opba)}2{Cu(dmphen)Cl}4]·1.5dmf·2.5dmso (2), [{Cu(opba)}2{Cu(dmphen)Br}4]·dmf·2.3dmso (3) and [{Cu(opba)}{Cu(dmphen)(dca)}2]n (4) [H4opba = N,N′-1,2-phenylenebis(oxamic acid), dmphen = 2,9-dimethyl-1,10-phenanthroline and dca = dicyanamide anion]. 1 is a neutral tricopper(II) complex where an inner [Cu(opba)]2− fragment adopts a bis-bidentate coordination mode towards two outer [Cu(dmphen)(NCS)]+ units. 2 and 3 are bis-trinuclear species where two oxamato-bridged [Cu(opba){Cu(dmphen)X}2…
A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox].
A new compound of formula (Bu4N)2[Mn2{Cu(opba)}2ox] (1) [Bu4N(+) = tetra-n-butylammonium cation, H4opba = 1,2-phenylenebis(oxamic acid), and H2ox = oxalic acid] has been synthesized and magneto-structurally investigated. The reaction of manganese(II) acetate, [Cu(opba)](2-), and ox(2-) in dimethyl sulfoxide yielded single crystals of 1. The structure of 1 consists of heterobimetallic oxamato-bridged Cu(II)Mn(II) chains which are connected through bis-bidentate oxalate coordinated to the manganese(II) ions to afford anionic heterobimetallic layers of 6(3)-hcb net topology. The layers are interleaved by n-Bu4N(+) counterions. Each copper(II) ion in 1 is four-coordinate in a square planar envi…
Copper(II) assembling with bis(2-pyridylcarbonyl)amidate and N,N'-2,2-phenylenebis(oxamate).
We herein present the synthesis and X-ray structures of five copper(II) complexes of formulae [Cu(bpca)(CF3SO3)(H2O)]·H2O (1), [Cu(bpca)(Phpr)(H2O)]·3/2H2O (2), {[Cu(bpca)]2[Cu(opba)(H2O)]}·H2O (3), {[Cu(bpca)]2(H2opba)}2·6H2O (4) and [Cu(bpca)(EtH2opba)]n (5), where bpca = bis(2-pyridylcarbonyl)amidate, Phpr = 3-phenylpropionate, CF3SO3(−) = triflate (anion of the trifluoromethanesulphonic acid), H4opba = N,N′-1,2-phenylenebis(oxamic acid), and EtH3opba = monoethyl ester derivative of the H4opba. 1 and 2 are mononuclear copper(II) complexes where the copper atom is five-coordinate in distorted square pyramidal surroundings with a tridentate bpca and a water molecule (1)/carboxylate oxygen …
Building-up host-guest helicate motifs and chains: a magneto-structural study of new field-induced cobalt-based single-ion magnets.
In this work, we present the synthetic pathway, a refined structural description, complete solid-state characterization and the magnetic properties of four new cobalt(II) compounds of formulas [Co(H2O)6][Co2(H2mpba)3]·2H2O·0.5dmso (1), [Co(H2O)6][Co2(H2mpba)3]·3H2O·0.5dpss (2), [Co2(H2mpba)2(H2O)4]n·4nH2O (3), and [Co2(H2mpba)2(CH3OH)2(H2O)2]n·0.5nH2O·2ndpss (4) [dpss = 2,2′-dipyridyldisulfide and H4mpba = 1,3-phenylenebis(oxamic) acid], where 2 and 4 were obtained from [Co(dpss)Cl2] (Pre-I) as the source of cobalt(II). All four compounds are air-stable and were prepared under ambient conditions. 1 and 2 were obtained from a slow diffusion method [cobalt(II) : H2mpba2− molar ratio used 1 : …
Solvent-driven dimensionality control in molecular systems containing CuII, 2,2′-bipyridine and an oxamato-based ligand
A discrete dicopper(II) system, [Cu(bipy)(H2mpba)]2·2H2O (1), and its isomeric chain, [Cu(bipy)(H2mpba)]·dmso (2) [bipy = 2,2′-bipyridine and H4mpba = N,N′-1,3-phenylenebis(oxamic acid)], were obtained by modifying the ratio of the H2O–dmso solvent mixture, and their interconversion was also monitored by changing the solvents during the synthesis. The solvents play an essential role in the formation and crystallization of these complexes, presenting different dimensionalities and connectivities. The double deprotonated H2mpba2− adopts the bidentate/monodentate (1) and bis-bidentate (2) bridging modes toward the (2,2′-bipyridyl)copper(II) units affording a dinuclear compound (1) and a linear…
Influence of Copper(II) and Nickel(II) Ions in the Topology of Systems Based on a Flexible Bis-Oxamate and Bipyridine Building Blocks
Single crystals of the mononuclear bis-oxamate nickel(II) complex [Ni(bipy)(H2edpba)]·dmso (1) are obtained by reacting [Ni(bipy)Cl2]·H2O and the flexible K2(H2edpba) ligand [bipy = 2,2′-bipyridine; H4edpba = N,N′-2,2′-ethylenediphenylenebis(oxamic acid)]. The reaction of 1 with copper(II) ions resulted in two products in which the replacement of the nickel(II) ion by copper(II) took place: the chain compound [Cu(bipy)(H2edpba)]n·3nH2O·ndmso [dmso = dimethyl sulfoxide] (2) and the analogous chain compound without dmso crystallization molecules [Cu(bipy)(H2edpba)]n·1.5nH2O (3a) in its polycrystalline form. The reaction of [Cu(bipy)Cl2] and K2(H2edpba) yielded single crystals of [Cu(bipy)(H2e…
CCDC 1016163: Experimental Crystal Structure Determination
Related Article: Walace D. do Pim, Tatiana R. G. Simões, Willian X. C. Oliveira, Isabella R. A. Fernandes, Carlos B. Pinheiro, Francesc Lloret, Miguel Julve, Humberto O. Stumpf, Cynthia L. M. Pereira|2014|Cryst.Growth Des.|14|5929|doi:10.1021/cg501134y
CCDC 923163: Experimental Crystal Structure Determination
Related Article: Maria V. Marinho, Tatiana R. G. Simões, Marcos A. Ribeiro, Cynthia L. M. Pereira, Flávia C. Machado, Carlos B. Pinheiro, Humberto O. Stumpf, Joan Cano, Francesc Lloret, and Miguel Julve|2013|Inorg.Chem.|52|8812|doi:10.1021/ic401038c
CCDC 1901771: Experimental Crystal Structure Determination
Related Article: Tatiana R. G. Simões, Maria Vanda Marinho, Jorge Pasán, Humberto O. Stumpf, Nicolás Moliner, Francesc Lloret, Miguel Julve|2019|Dalton Trans.|48|10260|doi:10.1039/C9DT01277J
CCDC 942308: Experimental Crystal Structure Determination
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CCDC 1901770: Experimental Crystal Structure Determination
Related Article: Tatiana R. G. Simões, Maria Vanda Marinho, Jorge Pasán, Humberto O. Stumpf, Nicolás Moliner, Francesc Lloret, Miguel Julve|2019|Dalton Trans.|48|10260|doi:10.1039/C9DT01277J
CCDC 942307: Experimental Crystal Structure Determination
Related Article: Tatiana R. G. Simões, Walace D. do Pim, Ingrid F. Silva, Willian X. C. Oliveira, Carlos B. Pinheiro, Cynthia L. M. Pereira, Francesc Lloret, Miguel Julve, Humberto O. Stumpf|2013|CrystEngComm|15|10165|doi:10.1039/C3CE41783B
CCDC 1901769: Experimental Crystal Structure Determination
Related Article: Tatiana R. G. Simões, Maria Vanda Marinho, Jorge Pasán, Humberto O. Stumpf, Nicolás Moliner, Francesc Lloret, Miguel Julve|2019|Dalton Trans.|48|10260|doi:10.1039/C9DT01277J
CCDC 1901768: Experimental Crystal Structure Determination
Related Article: Tatiana R. G. Simões, Maria Vanda Marinho, Jorge Pasán, Humberto O. Stumpf, Nicolás Moliner, Francesc Lloret, Miguel Julve|2019|Dalton Trans.|48|10260|doi:10.1039/C9DT01277J
CCDC 1016161: Experimental Crystal Structure Determination
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CCDC 1016162: Experimental Crystal Structure Determination
Related Article: Walace D. do Pim, Tatiana R. G. Simões, Willian X. C. Oliveira, Isabella R. A. Fernandes, Carlos B. Pinheiro, Francesc Lloret, Miguel Julve, Humberto O. Stumpf, Cynthia L. M. Pereira|2014|Cryst.Growth Des.|14|5929|doi:10.1021/cg501134y