Ammonium tetraoxoiodate(VII)

During the attempted crystal growth of periodate complexes of lanthanide elements, good quality crystals of ammonium iodate(VII) formed and were used to confirm the structure. The I—O distance was 1.772(3)Å, and the O—I—O angles were 108.4(1) (×4) and 111.6(2)° (×2).

Sodium 2,4-di­chloro-5-nitrobenzoate dihydrate

The Na⁺ ion is in a distorted octahedral enviroment, with four vertices being occupied by water O atoms and two by carboxylate O atoms. The structure is composed of discrete [C₆H₂Cl₂NO₂CO₂]⁻ anionic units, held together by intervening Na⁺ ions and two nobreak water molecules.

Sodium tris­(1,4-dioxane) iodide

The sodium ion, located on a threefold axis, is surrounded by six centrosymmetric dioxane molecules octahedally, which link sodium ions to give a polymeric structure.

A dinuclear nickel(II) complex with tri­ethylene­tetra­aminehexa­acetic acid

Numerous intra- and intermolecular hydrogen bonds exist in the title compound, hexaaquanickel(II) μ-triethylenetetraaminehexaacetato-bis[aquadinickel(II)], [Ni(H₂O)₆]^2+.[Ni₂(TTHA)(H₂O)₂]^2−.4H₂O. The [Ni(H₂O)₆]²⁺ cations are connected by hydrogen bonds to form a one-dimensional chain and the whole molecule forms an intricate three-dimensional network.

Bis(3-acetylamino-1,2,4-triazole-O,N⁴)bis­(nitrato-O)copper(II)

The centrosymmetric title complex [CuL₂(NO₃)₂], where L is 3-acetylamino-1,2,4-triazole, has been investigated. The environment of the Cu atom is elongated octahedral.

cis-[1,2-Bis(di­phenylphosphino)ethene]di­chloropalladium(II) bis­(tri­chloro­methane) solvate

In the title compound, the Pd atom is coordinated to cis-[Ph₂PC(H)=(H)CPPh₂] through the P atoms and to two Cl atoms in a slightly distorted square-planar arrangement, with the most noticeable distortion in the P—Pd—P angle of 86.10(4)°. The Pd—P and Pd—Cl bond lengths of 2.2291(8) and 2.3617(8)Å, respectively, are similar to the values found in related palladium(II) complexes.

Triquinolinium hexanitratolanthate(III) monohydrate

In the title compound, the La^III ion is 12-coordinate, surrounded by six bidentate nitrate groups, with La—O bond lengths ranging from 2.627(2) to 2.706(2)Å. Hydrogen bonding between the lattice water molecule and the nitrate O atoms forms a one-dimensional zigzag chain.

1,1'-Di­methyl-2,2'-bi­imidazole

In the title compound, the two rings are approximately coplanar. The molecule lies on a crystallographic inversion center and adopts the anti conformation, keeping the methyl groups apart.

Cyclopropanation reactions on α-cis-himachalene and a β-himachalene

The crystallographic structures of 3α,4α-dibromomethano-3,5,5-trimethyldecahydro-1H-benzocycloheptene-9,1^'-spiro(2^',2^'-dibromocyclopropane), C₁₇H₂₄Br₄, (3), 3α,4α-dichloromethano-3,5,5-trimethyldecahydro-1H-benzocycloheptene-9,1^'-spiro(2^',2^'-dichlorocyclopropane), C₁₇H₂₄Cl₄, (4), and 9α,9aα-dichloromethano-3,5,5,9-tetramethyl-1,4a,5,6,7,8,9,9a-octahydro-2H-benzocycloheptene, C₁₆H₂₄Cl₂, (5), resulting from cyclopropanation reactions of the C=C double bonds of α-cis-himachalene and β-himachalene, are reported.

[2-Hy­droxy-(1S,2R)-1,2-bis­(4-methoxyphenyl)ethyl]ammonium L-tartrate hydrate

In the title compound, the ammonium cation is connected to tartrate anions and water molecules through O—H⋯O and N—H⋯O hydrogen bonds. As a whole, the structure is stabilized by numerous hydrogen bonds.

DL-Amino­phenylacetic acid

The racemate DL-aminophenylacetic acid (DL-2-amino-2-phenylethanoic acid) crystallizes in space group P2₁/c. The crystal is divided into distinct hydrophilic and hydrophobic layers. The structure is part of an ongoing program to provide accurate H-atom positions in crystal structures of hydrophobic amino acids [Dalhus & Görbitz (1999a). Acta Cryst. C55. In the press].

8-Chloro-11-(4-methylpiperazin-1-yl)dibenzo[b,f]-1,4-selenazepine

The title compound is an original potential drug analogue of clozapine (C₁₈H₁₉ClN₄), a well known atypical antipsychotic compound. The crystal structure is isostructural with that of C₁₈H₁₈ClN₃S published previously. The selenoazepine ring adopts a boat conformation and the piperazine ring has a normal chair conformation.

Analogues of anacardic acids: 6-(cyclo­hexylmethyl)salicylic acid and 6-(2-cyclo­hexylethyl)salicylic acid

The title compounds, C₁₄H₁₈O₃, (1), and C₁₅H₂₀O₃, (2), are in monoclinic space groups C2/c and P2₁/c, respectively. The cyclohexane ring adopts a chair conformation in both cases. The plane of the central four atoms makes an angle of 87.1(1)° with the phenyl ring in (1) and and angle of 51.3(1)° in (2). Both structures have an intra- and an intermolecular hydrogen bond.

(2R,S_P)-2-Hydroxymethyl-1-phenylphospholane 1-oxide

A single-crystal structure analysis of the new title compound reveals an intermolecular hydrogen bond between the 2-methylhydroxyl group and the P=O group.

K₄Sb₂O₃ containing the Sb₂O₃^4- anion

The title compound, tetrapotassium diantimony trioxide, crystallizes in the hexagonal space group P6₃mc. The structure consists of stacking of trigonal–pyramidal Sb₂O₃⁴⁻ anions along the c axis. The Sb—Sb bond length of 2.803(3)Å corresponds to a metal–metal single bond, while very short Sb—O bond lengths of 1.74(2)Å are characteristic of double bonds.

The lamellar double-hydroxide (LDH) compound with composition 3CaO^.Al₂O₃^.Ca(NO₃)₂^.10H₂O

The title compound, tetracalcium dialuminum dodecahydroxide dinitrate tetrahydrate, is a layered compound constituted by positively charged [Ca₄Al₂(OH)₁₂]²⁺ main layers and negatively charged [2NO₃^.4H₂O]²⁻ interlayers. The interlayer part of the structure is strongly disordered.

Triclinic sodium tungsten oxide, Na₅W₁₄O₄₄

The structure of the title compound is built up of groups of four layers of WO₆ octahedra linked together through a layer of a different type consisting of isolated WO₅ trigonal bipyramids. The Na atoms are distributed in the hexagonal holes of these layers.

γ-Mo₄O₁₁

The space group of the title compound, tetramolybdenum undecaoxide, has been confirmed to be Pna2₁. Three out of the four Mo atoms are each coordinated by six O atoms to form MoO₆ octahedra. The remaining Mo atom is coordinated by four O atoms to form an MoO₄ tetrahedron.

RbMoO₂AsO₄

The structure of rubidium molybdyl arsenate consists of AsO₄ tetrahedra and MoO₆ octahedra sharing corners to form a three-dimensional framework containing large tunnels, parallel to [110], where the Rb⁺ ions are located. RbMoO₂AsO₄ is isostructural with the phosphate KMoO₂PO₄. They both crystallize in the orthorhombic space group Fddd.

A new modification of NaCoPO₄ with the zeolite ABW structure

A new polymorph of NaCoPO₄, sodium cobalt(II) phosphate, crystallizes with a monoclinic modification of the zeolite ABW structure. The five-coordinate Na⁺ cations reside within channels running through an open cobalt–phosphate framework constructed from four-, six- and eight-membered rings of alternating CoO₄ and PO₄ tetrahedra.

Di­chloro[ferrocene-1,1'-diylbis(di­phenylphosphine-P)]cobalt(II)

trans-Carbonyl[η²-di­hydrobis(pyrazol-1-yl-N²)borato]hydridobis(tri­phenylarsine)ruthenium(II) monohydrate

Di-μ-chloro-bis­{chloro[(4a,5,6,7,8,8a-η⁶)-1,2,3,4-tetra­hydro­naphthalene]ruthenium(II)}

Tetra­phenylphosphonium tetra­kis­(1-methyl-1,2,3,4-tetrazole-5-thiolato-S)aurate(III) hemihydate

A trimeric aluminium alkoxide: methoxyaluminium dichloride

Hexa­kis­(imidazole-N³)nickel(II) oxydi­acetate ethanol solvate

μ₃-Iodo-2:3:4κ³I-tri-μ₃-sulfido-1:2:3κ³S;1:2:4κ³S;1:3:4κ³S-sulfido-1κS-tris­(tri­phenylphosphine)-2κP,3κP,4κP-tris­ilvertungsten–tri­phenylphosphine sulfide (1/1)

Addition compounds of titanium tetrachloride with aromatic nitrogen bases

catena-Poly[[bis­(μ-2,6-di­methylpiperidinido-N:N)dilithium]-μ-(N,N,N',N'-tetra­methylethylenedi­amine-N:N')]

Di­chlorobis(2-hydroxymethyl-1-methylimidazole-N³)zinc(II)

Disodium 4,4'-di­fluoro-3,3'-carbonyldi­benzene­sulfonate hydrofluoride tetrahydrate

An oxamidato-bridged binuclear imidazole–copper(II) complex

(2,2'-Bi­pyridyl-N,N')di-n-butyldi­chlorotin(IV)

Bis(2-methyl-8-quinolinolato-N,O)tin(II)

[CuCl(C₁₂H₉N₂O₅)(C₁₂H₁₀N₂O₅)(H₂O)]

Deca­carbonyl(μ-hydrido)(μ-2-hydroxyeth­oxy)triosmium

A monomeric and a dimeric copper(II) trigonelline adduct with chloride, and a dimeric copper(II) 1-methyl-2-pyrrole­carboxylate adduct with 3-methylpyridine

Tris(2-pyridylmethyl)tri­aza­cyclodo­decane complexes of Fe^II and Cu^II

Tri­phenyltin N,N-di­methylthiocarbamoylacetate, tri­phenyltin N,N-penta­methylenecarbamoylthio­acetate and cyclo­pentyldi­phenyltin N,N-di­methylthiocarbamoylacetate

{4,4'-Di­methyl-6,6'-bis­(1-morpholinio­methyl)-2,2'-[1,2-ethanediylbis(nitrilo­methyl­idene-N)]diphenolato-O,O'}copper(II) diperchlorate monohydrate

A neutral cobalt(II) complex of a Schiff base ligand containing mixed O₂S₂N₂ donors

Chloro(di-2-pyridyl-κN-amine)(propionato-κ²O,O')copper(II) monohydrate

Di­azidobis(1,10-phenanthroline-N,N')manganese(II)

catena-Poly[[(2,2'-bi­pyridine)iron(II)]-μ-oxalato]

Aminoguanidinium (ethylenedi­amine-N,N,N',N'-tetra­acetato)antimonate(III) monohydrate

Diclofenac interactions: tetra­kis­[μ-2-(2,6-di­chloroanilino)phenylacetato]-1:2κ⁸O:O'-diacetone-1κO,2κO-dicopper(II)(Cu–-Cu) acetaldehyde solvate

Disodium hexa­aquacobalt(II) bis­[di­hydrogen 1,2,4,5-benzene­tetra­carboxylate(2 –)] tetrahydrate

The red form of [Re(phen)(CO)₃(H₂O)]CF₃SO₃^.H₂O

Di­benzylbis(tert-butylimido)molybdenum(VI), containing both η¹- and η²-benzyl ligands

Dipotassium naphthalene-1,8-di­carboxylate–potassium bicarbonate

(C₂H₁₀N₂)[Co(H₂O)₆](HPO₄)₂: a supramolecular three-dimensional hydrogen-bonding network

{[μ-Bis(salicyl­idene)-1,3-propanediaminato]-copper(II)}di­chlorozinc(II)

{[μ-Bis(salicyl­idene)-1,3-propanediaminato]-(3-methylpyridine)copper(II)}di­iodozinc(II)

{[μ-Bis(salicyl­idene)-1,3-propanediaminato]-bis­(3,5-di­methylpyridine)nickel(II)}di­iodozinc(II)

{[μ-Bis(salicyl­idene)-1,3-propanediaminato]-copper(II)}di­iodozinc(II)

Bromotri­carbonyl(3,3'-di­methylene-2,2'-bi­quinoline)rhenium(I)

Hydrogen bonding in quinolinium-4-carboxylate dihydrate

Network of C—H⋯O interactions in 1,2-naphthalenedi­carboxylic anhydride

Ethylene bis­(di­methyldi­thiocarbamate) and butane-1,4-diyl bis­(di­methyldi­thiocarbamate)

p-Methoxybenzaldehyde isonicotinoylhydrazone monohydrate

2-Acetyl-6-phenyl-5,6,7,8-tetra­hydro-1-naphthyl p-toluene­sulfonate

9-Hy­droxy-8-iodo-4-methyl-7,8,9,10-tetra­hydrobenzo[h]coumarin

7-Methyl-3-(2-methylphenyl)-1,2,4-triazolo[3,4-b][1,3]benzo­thiazole, (I), and 7-methyl-3-(4-methylphenyl)-1,2,4-triazolo[3,4-b][1,3]benzo­thiazole, (II)

5-(2-Chloro­phenyl)-4-phenyl-3,4-di­hydro-2H-1,2,4-triazole-3-thione

(R)-(+)-2-(4-Chloro­phen­oxy)propionic acid

(S)-2-Amino-3-methyl-1-butanol (2S,3S)-hydrogen tartrate monohydrate

1-D-3,4-Anhydro-1,2:5,6-di-O-iso­propyl­idene-allo-inositol

N-(Iso­propyl)norbornane-endo-2,3-dicarboximide

Low-temperature structure of allyl silatrane

Bis-lactim ethers of cyclic dipeptides. 1. Compounds derived from cyclo(Gly-L-Val)

Bis-lactim ethers of cyclic dipeptides. 2. Benzyl-substituted compounds

Unexpectedly produced 2-tert-butyl-5-(N,N-di­methylcarbamoyl)pyridine from 2-chloro-3-(N,N-di­methylcarbamoyl)pyridine with a tert-butyl Grignard reagent

4-Methoxybenzaldehyde penta­fluoro­phenylmethylidenehydrazone

Naphthalene-2,3-dicarbaldehyde

Two new 2,3-substituted 5-norbornenes

trans-2,6-Bis(ethylamino)-2,4,4,6,8,8-hexa­piperidino­cyclo-2λ⁵,4λ⁵,6λ⁵,8λ⁵-tetraphosphaza­tetra­ene

2',3',5'-Tri-O-benzoylinosine

1-Acetyl-5-(4-methoxyphenyl)-3-(4-methoxystyryl)-2-pyrazoline and 1-acetyl-5-(2-chloro­phenyl)-3-(2-chlorostyryl)-2-pyrazoline

Ethyl 1-(2-cyano­ethyl)-3,5-di­methyl-1H-indole-2-carboxylate

Di­methyl oleana-13(18),15(16)-diene-3β,28-di­acetate

Uronium sulfate, [OHC(NH₂)₂]₂(SO₄)

Regioselectivity in dibenzobarrelene photorearrangements: photoproducts derived from 9-substituted-dibenzobarrelenes

Intermolecular N—H⋯O and C—H⋯O interactions form a two-dimensional network in (2S,4S,5R)-(–)-3,4-di­methyl-5-phenyl-2-(pyrrol-2-yl)-1,3-oxazolidine

X-ray investigations of potential β-blockers. IV

(2S,3S)- and (2R,3S)-2-[2-(benzyl­oxy)ethyl]-3-(6-chloro-9H-purin-9-yl)oxolane

(PMePh₃)(7,8-Et₂-7,8-nido-C₂B₉H₁₀)

(1R,2R,3S,4S,5S,6S)-exo-2-Cyano-exo-3-[(S)-1,2-di­benzyloxyethyl]-exo-5-iodobi­cyclo[2.2.1]heptane-endo-2,6-carbolactone

An investigation of 2,4'-di­hydroxy-3,3'-di­meth­oxy-5'-methylstilbene using X-ray crystallography and NMR spectroscopy

5-Methyl-1H-tetrazole

Crystallographic evidence for the electronic distribution in (2,4-cyclo­pentadien-1-ylidenehydrazono)tri­phenylphosphorane

The N-phenylamide of 2-cyano-5-phenylpent-2-en-4-ynoic acid

Study of a diastereoisomeric di­hydro­thiophene derivative at 150K

N-tert-Butoxycarbonyl-N,N'-ethylene-bridged (S)-tyrosyl-(S)-tyrosine methyl ester

Absolute configuration of the active stereoisomer of new rice fungicide Carpropamid

3-Ethyl-5-(5,6,7,8-tetra­hydro-5,5,8,8-tetra­methyl-2-naphthylmethylene)thiazolidine-2,4-dione

3-(2-Hydroxyphenylamino)-5,5-di­methylcyclohex-2-enone

Triterpenoide. XIV. [2,3-d]Isoxazoltriterpenderivate

Dimorphism of 2,3,5,6-tetra­phenylpyrazine

A new orthorhombic phase of N,N'-di­phenylguanidine