Preparation and Thermal Analysis of C 14 H 10 N 4 O 6 and its Complexes with Rare Earth

Zeitschrift Für Kristallographie - New Crystal Structures

Jin

et al. 2015

. Asolution of ammonia (0.5 M)was added dropwise to amethanol (15 mL) solution of HL (3 mmol), resulting in atransparent solution. Amethanol (15 mL) solution of Dy(III) nitrate hexahydrate (1 mmol) was added into the resulting solution and allowed to stir for 12 h. The suspension was filtered and diethyl ether was allowed to diffuse slowly into the solution of the filtrate. Colourless crystals were obtained in about 3weeks. Experimental detailsHatomsbound to Catoms were placed in calculated positions and treated as riding on their parent atoms, with C-H =0.93 or 0.97 Å and U iso (H) =1.2 or 1.5 U eq (C). Hatom of the hydroxy groups and watermolecules were refinedwithrestraintanO-H distance of 0.85 Å DiscussionLanthanide-based carboxylate complexes have been found to exhibit anticancer, unusual coordination characteristics, exceptional optical, magnetic properties [2-4] precursors for oxides [5] and fungicidal properties [6]. As an ongoing part of our investigations, we report the preparation and crystal structure of the title compound. In the molecular structure of the title complex, the coordination sphere of each Dy III ion consists of one water ligand and eight oxygen atomsfrom three ligands to form anine coordination (see Fig). Three ligands are of two coordination modes with one belonging to mode Aand the rest two in mode B. Mode A: O4 and O5 of the carboxylic group are connected to two adjacent Dy III ions, respectively.M odeB :O 1a nd O2 of the carboxylic group are connected to the sameDy III ion, O2 is also connectedt oa djacentD y III ion. The title molecular structurei s built up of ligandsthatbridge two pairsofsuch Dy III ions through the deprotonated carboxylate oxygen atoms. The Dy III ions are bridged up by two O2-atomsand two O7-atomswith Dy1×××Dy1 distance of 4.2631(2)and 4.1193(2) Å, respectively. Thedihedral angles between Dy1-O2-Dy1-O2 and O2-C1-O1-Dy1 as well as Dy1-O7-Dy1-O7 and Dy1-O5-Dy1-O5 are 40.405(2)°and 87.780(1)°,respectively. Thebond distancesofDy-O are in the range of 2.471(4)-2.647(4)Å ,( ave. 2.551 Å).Ac oordination polymeroriented along the a direction is present.

Section: Discussionmentioning

confidence: 99%

The pseudosymmetric crystal structure of a Dy(III) complex with 3-(3- pyridin-4-yl-[1,2,4]oxadiazol-5-yl)propionic acid, C30H26DyN9O10

Zeitschrift Für Kristallographie - New Crystal Structures

Jin

et al. 2015

“…optical, and magnetic properties [2][3][4], they are known to be precursors for oxides [5] and possess fungicidal properties [6]. Lanthanide nitrates have been previously involved in the complexe formation, while little attention has been paid to the use of lanthanide chloride [7].…”

Section: Discussionmentioning

confidence: 99%

The crystal structure of hexaqua(μ₂-3-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)propanoato-1κ² O,O′;2κO′)(3-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)propanoato-κO)(3-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)propanoato-κ² O,O′)digadolinium(III) octahydrate, C₆₀H₇₆Gd₂N₁₈O₃₂

Chen

Zeitschrift Für Kristallographie - New Crystal Structures

Quan³

et al. 2016

“…They are used as precursors for oxides [5] and may possess fungicidal properties [6]. Lanthanide nitrates have been previously used in the synthethic protocol of such complexes, while little attention has been paid to the use of lanthanide chloride [7].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of hexaaqua-bis(3-(3-pyridin-4-yl-[1,2,4]oxadiazol-5-yl) propionato-κ³O,O′:O′)-bis(3-(3-pyridin-4-yl-[1,2,4]oxadiazol-5-yl)propionato-κO)-bis(3-(3-pyridin-4-yl-[1,2,4]oxadiazol-5-yl)propionato-κ²O,O′)dineodymium(III) octahydrate, C₆₀H₇₆N₁₈O₃₂Nd₂

Zeitschrift Für Kristallographie - New Crystal Structures

et al. 2016

C 60 H 76 N 18 O 32 Nd 2 , monoclinic, P21/c (no. 14), a = 10.609(5) Å, CCDC no.: 1495665A part of the title crystal structure is shown in the gure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters. Source of material3-(3-Pyridin-4-yl-[1,2,4]oxadiazol-5-yl)-propionic acid (HL) is easily available by a literature known synthesis [1]. A solution