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Tetrakis(μ(3)-9-oxa-10-boraanthracen-10-olato)tetrakis[(diethyl ether)lithium].

ABSTRACT: The title compound, [Li(4)O(4)(C(12)H(8)BO)(4)(C(4)H(10)O)(4)], features a Li(4)O(4) cube. Each Li atom in the cube is additionally coordinated by a diethyl ether mol-ecule and each O atom in the cube carries a 9-oxa-10-boraanthracene residue. The crystal studied was a non-merohedral twin [twin law (-1 0 0 / 0 0 1 / 0 1 0); the contribution of the major twin component refined to 0.553 (3)] emulating apparent tetra-gonal symmetry, whereas the actual crystal system is just ortho-rhom-bic.

SUBMITTER: Franz D

PROVIDER: S-EPMC3246952 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Poly[tetrakis(μ-1,1,1,3,3,3-hexafluoropropan-2-olato)iron(II)dipotassium].

Project description:The title compound, [K2Fe{OCH(CF3)2}4] n , was formed from the reaction of potassium hexa-fluoro-isopropoxide with iron(II) chloride in toluene. The Fe(II) atom has a highly distorted tetra-hedral coordination environment. All four of the non-equivalent hexa-fluoro-isoprop-oxy O atoms link the Fe(II) atoms to one of the K(+) atoms in an alternating chain of Fe-O-K-O fused four-membered rings, with K-Fe distances of 3.715 (2) and 3.717 (2) Å. This K(+) atom is also bridged to eight of the F atoms. The other K(+) atom is bonded to only two of the O atoms, but has seven short K⋯F contacts, one of which links the chains into a three-dimensional arrangement. Weak hydrogen bonding between the lone H atoms on the hexa-fluoro-isoprop-oxy groups and F atoms is also present. The crystal studied was refined as an inversion twin.

| S-EPMC3998246 | biostudies-literature

cyclo-Tetrakis(μ(2)-3-sulfidopropyl-κC,S:S)tetrakis[chloridocobalt(III)].

Project description:In the centrosymmetric title compound, [Co(4)Cl(4)(C(3)H(6)S)](4)], the two independent Co(III) ions are each coordinated in a distorted tetra-hedral geometry by one C, one Cl and two S atoms. The mol-ecules are stabilized by C-H⋯Cl hydrogen bonds. In the crystal, inter-molecular C-H⋯Cl and C-H⋯S hydrogen bonds with R(2) (2)(8), R(4) (2)(8) and R(2) (2)(6) ring motifs generate a polymeric network.

| S-EPMC3089308 | biostudies-literature

(Diethyl ether){1-[2-(1-methyl-1H-imidazol-2-yl-?N)-1,1-diphenyl-ethyl]-(1,2,3,3a,7a-?)-inden-yl}lithium(I).

Project description:In the title compound, [Li(C(27)H(23)N(2))(C(4)H(10)O)], the Li atom possesses a nearly planar trigonal coordination environment (assuming the cyclo-penta-dienyl ring of the indenyl group occupies one coordination place). The diethyl ether ligand adopts a nearly planar W-type conformation.

| S-EPMC2977547 | biostudies-literature

μ-Methyl-ene-bis-[di-bromido(diethyl ether-κ<i>O</i>)aluminium(III)]: crystal structure and chemical exchange in solution.

Project description:In the title compound, [Al2Br4(CH2)(C4H10O)2], the mol-ecule lies on a crystallographic twofold axis passing through the bridging C atom. Each AlIII atom is four-coordinate, being bonded to two bromide ions, bridging the CH2 group as well as the oxygen atom of a diethyl ether ligand in a slightly distorted tetra-hedral arrangement with angles ranging from 101.52 (8) to 116.44 (5)°. The Al-CH2-Al angle, 118.4 (2)°, is the smallest observed for a structure where this moiety is not part of a ring. In the crystal, weak C-H⋯Br inter-actions, characterized as R 2 2(12) rings, link the mol-ecules into ribbons in the [101] direction. The title compound is monomeric and coordinatively saturated in the solid state, as each aluminum is four-coordinate, but in solution the ether mol-ecules from either or both Al atoms can dissociate, and would be expected to rapidly exchange, and this is supported by NMR data.

| S-EPMC8183446 | biostudies-literature

Di-?-bromido-bis-[benz-yl(diethyl ether)magnesium].

Project description:The title benzyl Grignard reagent, [Mg(2)Br(2)(C(7)H(7))(2)(C(4)H(10)O)(2)], was obtained by reaction of benzyl bromide with magnesium in diethyl ether, followed by crystallization from toluene. The asymmetric unit comprises one half-mol-ecule, the structural dimeric unit being generated by inversion symmetry with an Mg?Mg distance of 3.469?(2)?Å. The Mg(II) atom exhibits a distorted tetrahedral coordination geometry. The crystal packing is defined by van der Waals inter-actions only.

| S-EPMC3393201 | biostudies-literature

The low-temperature structure of diethyl ether magnesium oxybromide.

Project description:The crystal structure of the title compound, hexa-?(2)-bromido-?(4)-oxido-tetra-kis-[(diethyl ether)magnesium], [Mg(4)Br(6)O(C(4)H(10)O)(4)], determined from data measured at 173?K, differs from the previously known structure of diethyl ether magnesium oxybromide, which was determined from room-temperature data [Stucky & Rundle (1964 ?). J. Am. Chem. Soc. 86, 4821-4825]. The title compound crystallizes in the tetra-gonal space group I[Formula: see text], whereas the previously known structure crystallizes in a different tetra-gonal space group, namely P[Formula: see text]2(1)c. Both molecules have crystallographic [Formula: see text] symmetry and show almost identical geometric parameters for the Mg, Br and O atoms. The crystal of the title compound turned out to be a merohedral twin emulating a structure with apparent Laue symmetry 4/mmm, whereas the correct Laue group is just 4/m. The fractional contribution of the minor twin component converged to 0.462?(1).

| S-EPMC3247535 | biostudies-literature

Improving the Durability and Performance of Sulfonated Poly(arylene ether)s by Introducing 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide Structure for Fuel Cell Application.

Project description:Polymer electrolyte membranes in which the hydrophilic and hydrophobic domains phase separate exhibit improved properties and stability. Such a phase separation of hydrophilic and hydrophobic domains can be achieved by polymerizing a 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide-bisphenol A (DOPO-BPA) and 1,4-bis(4-fluorobenzoyl)benzene (1,4-FBB) monomer. In this work, sulfonated polymer membranes with various degrees of sulfonation (DS) were prepared and their physicochemical and electrochemical properties were studied. In addition, the effect of molecular structure on the durability of the copolymers was investigated. The sulfonated copolymers were characterized by Fourier-transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy. Then, sulfonated membranes were prepared using these copolymers by the solvent casting method, and their morphologies were investigated by atomic force microscopy. The effect of DS on the thermal, mechanical, and oxidative stabilities, water uptake behavior, and ion-exchange capacity of the membranes was determined. The results showed that compared with the commercially available Nafion 212 polymer electrolyte membrane, the electrolyte membrane based on DOPO-BPA and 1,4-FBB exhibited a lower water uptake and excellent dimensional stability despite having a relatively high ion-exchange capacity. The low water uptake is an important characteristic that ensures the stability of the polymer electrolyte membrane in fuel cell applications.

| S-EPMC8717375 | biostudies-literature

Poly[(μ-2,3-diethyl-7,8-dimethylquinoxaline-κ2N:N)(2,3-diethyl-7,8-dimethylquinoxaline-κN)-μ-nitrato-κ2O:O′-nitrato-κ2O,O′-disilver(I)]

Project description: Not available

| S-EPMC10993558 | biostudies-literature

Poly[[aqua-(1-naphthyl-acetato)cadmium(II)]-μ(3)-pyridin-3-olato].

Project description:In the title complex, [Cd(C(5)H(4)NO)(C(12)H(9)O(2))(H(2)O)](n), each Cd(II) atom is coordinated by two carboxylate O atoms from one 1-naphthyl-acetate ligand, two hydroxyl O atoms from two pyridin-3-olate ligands, one N atom from another pyridin-3-olate ligand and one water mol-ecule, and displays a distorted octa-hedral coordination geometry. The compound forms infinite chains of pyridin-3-olate ligands bridging 1-naphthyl-acetate-Cd(II) units parallel to the b axis, with a Cd⋯Cd separation of 3.578 (2) Å. The chains are further self-assembled into a supra-molecular network through inter-molecular O-H⋯O hydrogen-bonding inter-actions.

| S-EPMC2914920 | biostudies-literature

Di-?-hydroxido-bis-[aqua-trichlorido-tin(IV)] diethyl ether disolvate.

Project description:The title compound, [Sn(2)Cl(6)(OH)(2)(H(2)O)(2)]·2C(4)H(10)O, consists of a centrosymmetric molecule and two additional solvent molecules and has an infinite two-dimensional network extending parallel to (101). The Sn atom is six-coordinate with a distorted octa-hedral geometry. Additional O-H?O hydrogen bonding leads to stabilization of the crystal structure.

| S-EPMC2959587 | biostudies-literature

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