2,3-Di­hydro-8-hy­droxy-5,7-di­meth­oxy-2-phenyl-4H-1-benzo­pyran-4-one and 3,3,6-Tri­bromo-2,3-di­hydro-8-hy­droxy-5,7-di­meth­oxy-2-phenyl-4H-1-benzo­pyran-4-one

2,3-Dihydro-8-hydroxy-5,7-dimethoxy-2-phenyl-4H-1-benzo-pyran-4-one was isolated from Uvaria dulcis Dunal. The determination of its crystal structure and that of its bromo derivative were carried out to confirm the structures proposed from spectroscopic data.

2-Ethoxycarbonyl-5-methoxycarbonyl-6-methyl-4-phenyl-4,7-di­hydrothieno[2,3-b]pyridine

This compound shows no unusual intramolecular or intermolecular distances or angles. The dihydrothieno[2,3-b]pyridine moiety is planar and the angle between this plane and that of the 4-phenyl ring is 85.8(1)°. The molecules are linked to form chains via intermolecular N-H⋯O hydrogen bonds.

8-(2-Bromo-4-methylanilino)-9-hy­droxy-4-methyl-7,8,9,10-tetra­hydro-7,8-benzocoumarin

The coumarin moiety in this compound is planar and the tetrahydrobenzene ring adopts a half-chair conformation. The planes of the coumarin and phenyl rings form a dihedral angle of 50.97(8)°. The crystal structure is stabilized by O-H⋯O hydrogen bonds involving carbonyl and hydroxyl O atoms.

Intralayer Hydrogen Bonding in CdSeO₃.H₂O

CdSeO₃.H₂O has a layer structure consisting of octahedral trans [CdSeO₃.H₂O]_i² layers. The hydrogen bonding is exclusively intralayer.

Tetra­ammonium Tetrametaphosphimate Tetrahydrate

The tetrametaphosphimate rings in (NH₄)₄(PO₂NH)₄.4H₂O exhibit a chair conformation and are linked by N-H⋯O hydrogen bonds to form columns along [100]. These columns are interconnected by O-H⋯O and N-H⋯O hydrogen bonds through the water molecules and ammonium ions.

Na₁₃K₄Ga_47.45: a New Sodium Potassium Gallide Phase Containing Trimeric Icosahedral Gallium Clusters

The structure of Na₁₃K₄Ga_47.45 contains Ga₁₂ icosahedra and oligomeric icosahedral units (Ga₂₈ trimers) packed within a three-dimensional framework. The interpolyhedral voids are occupied by the alkali-metal cations.

Li₂VOSiO₄: a Natisite-Type Structure

The structure of dilithium vanadyl silicate is isotypic with that of Li₂TiOSiO₄. It is built up from VO₅ square pyramids sharing corners with SiO₄ tetrahedra to form layers between which the Li ions are situated.

trans-Di­aquabis(2-thienyl 2-pyridyl ketone-O,N)copper(II) Tetra­fluoroborate

Tri­chloro(4,4'-di­methyl-2,2'-bi­pyridine-N,N')manganese(III) Aceto­nitrile Solvate (1/1)

Tri­carbonyl(η⁵-cyclo­pentadienyl)(tri­methylphosphine-P)molybdenum(II) Tetra­fluoroborate

Two Tetrahalooxomolybdate(V) Structures, [Ph₃PNPPh₃][MoOBr₄] and [PPh₄][MoOI₄(H₂ O)]

Aqua(2,3-di­methylpyridine-N)(N-salicylideneglycinato-O,N,O')copper(II)

catena-Poly[[(N-salicylideneglycinato-N,O,O')copper(II)-μ-pyrazine-N:N'-(N-salicylideneglycinato-N,O,O')copper(II)]-μ-1,4-dioxane-O:O']

{2-[2-(Salicyl­idene­amino­methyl)phenylimino-methyl]phenolato(2–)-N,N',O,O'}copper(II)

A Dimeric Copper(II) 4-Chloro­phenoxyisobutyrate Adduct with Methanol and a Monomeric Copper(II) 4-Chloro­phenoxyisobutyrate Adduct with Pyridine

Di­aquabis[N-(1-naphthyl)-N-nitroso­hydroxylaminato-O,O']cobalt(II)

Complexe de Cuivre(II) Di(nitriloacétatodiacétique) Dihydrate, [Cu(C₆H₈NO₆)₂].2H₂O

Bis(di-2-pyridyl-N-amine)(propionato-O)copper(II) Nitrate

μ-(2-Thioxo-1,3-di­thiole-4,5-di­thiolato)-bis­{[tris­(p-methoxyphenyl)phosphine]gold(I)}

μ-[7,8-Bis(di­phenylphosphino)-7,8-dicarba-nido-undecaborato-1κP,2κP'](penta­fluoro­phenyl-1κC)(tri­phenylphosphine-2κP)digold(I) Di­chloro­methane Solvate

trans-[Mo(O)(OH)(dppe)₂]⁺ as its Perchlorate Salt

A Polymeric Nickel(II) Thio­cyanate Complex of N-(2-Amino­ethyl)-N-methyl-1,2-ethanedi­amine

The Racemic C₃-Symmetrical Propeller Structure of Chlorotris(1,3-di­phenyl-1,3-propanedionato-O,O')zirconium(IV)

(9,10-Dioxo-9,10-di­hydro-1-anthrylaminato-N)(tri­phenylphosphine-P)gold

3-(η³-Allyl)-3,3-di­carbonyl-4-(di­methyl sulfido)-3,1,2-molybdadicarba-closo-dodecaborane(12)

Bis[di-2-pyridylmethanediolato(1–)-N,O,N']cobalt(III) Perchlorate Trihydrate

trans-Di­chlorotri(cyclo­hexyl)arsenic(V)

Tri­carbonyl[(4a,5,6,7,8,9-η)-2-methyl-2-phenyl-2H-benzo[f]chromen]chromium

A Topologically Novel Binuclear Silver Complex of Di-2-pyridyl Sulfide

A Dinuclear Tungsten(III) Complex Containing a Tungsten–Tungsten Triple Bond with an Asymmetric Arrangement of Ligands: [W₂Cl₃(OCMe₃)₃(NHMe₂)₂]

Ligands with Cycloalkane Backbones. IV. Di­chloro{(S,S)-trans-di­phenyl[(2-di­phenylphosphinyl)cyclo­hexyl]phosphinic acid ester}palladium(II)

Ecstasy: 3,4-Methylene­dioxymethamphetamine (MDMA)

The Effect of 3-Substitution on the Structures of Pyrrole-2-carbaldehydes

Two Methylsulfanylmethylene Derivatives of Meldrum's Acid

Chasmaconitine 0.5-Methanol Solvate

Citraconic Acid

Cyclothreonine at 122K

6α-Chloro-3α-hydroxymethyl-2,2-di­methylpenam 1,1-Dioxide

1,4,8,11-Tetra­thia­cyclo­tetradecan-6-one

2'-Hy­droxy-3'-meth­oxy-5'-flavone­sulfonic Acid Trihydrate: a New Zwitterion

5,5-Di­hydroxyethylbarbituric Acid

Electronic Effects on C—O—C Ether Bonds in 3-Aryl­oxy Derivatives of Benziso­thiazole 1,1-Dioxides: Rapid Ethanolysis of 3-(4-Nitro­phen­oxy)-1,2-benziso­thiazole 1,1-Dioxide, (1), to give 3-Eth­oxy-1,2-benziso­thiazole 1,1-Dioxide, (2)

Complex Network of Hydrogen Bonds in 3-Amino­pyrazole-4-carboxylic Acid

Crystallographic Evidence of [1,5]Prototropic Shifts Occurring upon Transannular Diels–Alder Reaction of a 14-Membered Macrocycle leading to a 5α-Steroid Skeleton

Tetra­methyltetra­thiafulvalenium Bromide Benzo­nitrile Water Solvate

(2R,3R)-2,3-Di­benzyl­oxy-1,4-bis­(di­phenylphosphino)butane

2,7-Di­chloro­thianthrene

(S),(E)-5-Methoxycarbonyl-3-tri­phenylmethylaminohex-4-en-4-olide

15,17-Di-2-propenylcalix[4]arene-25,26,27,28-tetrol: Self-Complexation and C—H⋯O Interactions

3-Methyl-1,5-di­nitro-3-azabi­cyclo[3.3.1]non-7-ene

Methanol–Water Solvate of N-(1-Adamantyl)acetamide

A Stacked Pyrazolo[3,4-d]pyrimidine-Based Flexible Molecule

4-Benzyl-2,9-bis­(phenylsulfonyl)-1,2,3,4-tetra­hydro-9H-β-carboline

1,3,3-Tri­methylindoline-2-spiro-2'-3'-methyl-2'H-phenanthro[9,10-b][1,4]oxazine

The Khellin Quinone. Erratum

Erratum to Acta Cryst. (1997), C53, 1949-1950.

1,3-Bis[bis­(di­methylamino)]-N-methyldiborylamine. Erratum

Erratum to Acta Cryst. (1997), C53, 1951-1952.