0000000000221429
AUTHOR
Flavia Artizzu
Synthesis and Physical Properties of K4[Fe(C5O5)2(H2O)2](HC5O5)2·4H2O (C5O52– = Croconate): A Rare Example of Ferromagnetic Coupling via H-bonds
The reaction of the croconate dianion (C(5)O(5))(2-) with a Fe(III) salt has led, unexpectedly, to the formation of the first example of a discrete Fe(II)-croconate complex without additional coligands, K(4)[Fe(C(5)O(5))(2)(H(2)O)(2)](HC(5)O(5))(2)·4H(2)O (1). 1 crystallizes in the monoclinic P2(1)/c space group and presents discrete octahedral Fe(II) complexes coordinated by two chelating C(5)O(5)(2-) anions in the equatorial plane and two trans axial water molecules. The structure can be viewed as formed by alternating layers of trans-diaquabis(croconato)ferrate(II) complexes and layers containing the monoprotonated croconate anions, HC(5)O(5)(-), and noncoordinated water molecules. Both …
A family of layered chiral porous magnets exhibiting tunable ordering temperatures.
A simple change of the substituents in the bridging ligand allows tuning of the ordering temperatures, Tc, in the new family of layered chiral magnets A[M(II)M(III)(X2An)3]·G (A = [(H3O)(phz)3](+) (phz = phenazine) or NBu4(+); X2An(2-) = C6O4X2(2-) = 2,5-dihydroxy-1,4-benzoquinone derivative dianion, with M(III) = Cr, Fe; M(II) = Mn, Fe, Co, etc.; X = Cl, Br, I, H; G = water or acetone). Depending on the nature of X, an increase in Tc from ca. 5.5 to 6.3, 8.2, and 11.0 K (for X = Cl, Br, I, and H, respectively) is observed in the MnCr derivative. Furthermore, the presence of the chiral cation [(H3O)(phz)3](+), formed by the association of a hydronium ion with three phenazine molecules, lead…
Structural Diversity and Physical Properties of Paramagnetic Molecular Conductors Based on Bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) and the Tris(chloranilato)ferrate(III) Complex
International audience; Electrocrystallization of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) in the presence of the tris(chloranilato)ferrate(III) [Fe(Cl2An)3]3– paramagnetic chiral anion in different stoichiometric ratios and solvent mixtures afforded three different hybrid systems formulated as [BEDT-TTF]3[Fe(Cl2An)3]·3CH2Cl2·H2O (1), δ-[BEDT-TTF]5[Fe(Cl2An)3]·4H2O (2), and α‴-[BEDT-TTF]18[Fe(Cl2An)3]3·3CH2Cl2·6H2O (3). Compound 1 presents an unusual structure without the typical alternating organic and inorganic layers, whereas compounds 2 and 3show a segregated organic–inorganic crystal structure where layers formed by Λ and Δ enantiomers of the paramagnetic complex, together with…
Synthesis, Structure, Spectroscopic Studies and Magnetic Properties of the Tetrakis(5,7‐dichloro‐8‐quinolinolato)gadolinium(III) Complex
The synthesis and structural characterization of the neutral gadolinium tetrakis-type complex with 5,7-dichloro-8-quinolinolato (H5,7ClQ) ligands, [Gd(5,7ClQ)2(H5,7ClQ)2Cl], is reported. The GdIII ion is epta coordinated to one chloride ion and to four ligands: two N,O-chelated monoanions and two as zwitterionic (+NH and O–) monodentate oxygen donors. Electronic and vibrational spectra provide suitable markers to distinguish the presence of deprotonated and protonated ligands. The magnetic behaviour of this compound was investigated and explained by taking into account that π–π stacking interactions between the (H5,7ClQ) ligands give rise to a ferromagnetic interaction between the gadoliniu…
New BDH-TTP/[MIII(C5O5)3]3– (M = Fe, Ga) Isostructural Molecular Metals
Two new isostructural molecular metals-(BDH-TTP)(6)[M(III)(C(5)O(5))(3)]·CH(2)Cl(2) (BDH-TTP = 2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene, where M = Fe (1) and Ga (2))-have been prepared and fully characterized. Compound 1 is a molecular conductor showing paramagnetic behavior, which is due to the presence of isolated [Fe(C(5)O(5))(3)](3-) complexes with high-spin S = (5)/(2) Fe(III) metal ions. The conductivity originates from the BDH-TTP organic donors arranged in a κ-type molecular packing. At 4 kbar, compound 1 behaves as a metal down to ∼100 K, showing high conductivity (∼10 S cm(-1)) at room temperature. When applying a pressure higher than 7 kbar, the metal-insulator…
CCDC 953847: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Samia Benmansour, Guillermo Mínguez Espallargas, Miguel Clemente-León, Alexandre Abhervé, Patricia Gómez-Claramunt, Eugenio Coronado, Flavia Artizzu, Elisa Sessini, Paola Deplano, Angela Serpe, Maria Laura Mercuri, and Carlos J. Gómez García|2013|Inorg.Chem.|52|10031|doi:10.1021/ic4013284
CCDC 996584: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Flavia Pop, Pascale Auban-Senzier, Carlos J. Gómez-García , Enric Canadell, Flavia Artizzu, Angela Serpe, Paola Deplano, Narcis Avarvari, and Maria Laura Mercuri|2014|Inorg.Chem.|53|7028|doi:10.1021/ic501001r
CCDC 996582: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Flavia Pop, Pascale Auban-Senzier, Carlos J. Gómez-García , Enric Canadell, Flavia Artizzu, Angela Serpe, Paola Deplano, Narcis Avarvari, and Maria Laura Mercuri|2014|Inorg.Chem.|53|7028|doi:10.1021/ic501001r
CCDC 953846: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Samia Benmansour, Guillermo Mínguez Espallargas, Miguel Clemente-León, Alexandre Abhervé, Patricia Gómez-Claramunt, Eugenio Coronado, Flavia Artizzu, Elisa Sessini, Paola Deplano, Angela Serpe, Maria Laura Mercuri, and Carlos J. Gómez García|2013|Inorg.Chem.|52|10031|doi:10.1021/ic4013284
CCDC 996583: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Flavia Pop, Pascale Auban-Senzier, Carlos J. Gómez-García , Enric Canadell, Flavia Artizzu, Angela Serpe, Paola Deplano, Narcis Avarvari, and Maria Laura Mercuri|2014|Inorg.Chem.|53|7028|doi:10.1021/ic501001r
CCDC 953848: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Samia Benmansour, Guillermo Mínguez Espallargas, Miguel Clemente-León, Alexandre Abhervé, Patricia Gómez-Claramunt, Eugenio Coronado, Flavia Artizzu, Elisa Sessini, Paola Deplano, Angela Serpe, Maria Laura Mercuri, and Carlos J. Gómez García|2013|Inorg.Chem.|52|10031|doi:10.1021/ic4013284
CCDC 953849: Experimental Crystal Structure Determination
Related Article: Matteo Atzori, Samia Benmansour, Guillermo Mínguez Espallargas, Miguel Clemente-León, Alexandre Abhervé, Patricia Gómez-Claramunt, Eugenio Coronado, Flavia Artizzu, Elisa Sessini, Paola Deplano, Angela Serpe, Maria Laura Mercuri, and Carlos J. Gómez García|2013|Inorg.Chem.|52|10031|doi:10.1021/ic4013284