Mercury(II) polyphosphate, Hg(PO₃)₂

Hg(PO₃)₂ is isotypic with the low-temperature form α-Cd(PO₃)₂. It contains infinite polyphosphate chains and ¹_∞[HgO₂O_4/2] units, both running parallel to the c axis.

Rubidium stannate(IV), Rb₄SnO₄

The title compound crystallizes with the Na₄CoO₄ structure type, showing discrete SnO₄⁴⁻ anions as main building blocks. The structure is thus isotypic with a series of corresponding compounds A₄MO₄ (A = alkali metal and M = group IV element).

High-temperature LaAs₂

The high-temperature structure of lanthanum diarsenide comprises La³⁺ cations coordinated in a tricapped trigonal prismatic geometry by As atoms from two kinds of polyarsenide chain anions, namely As₃⁵⁻ and As₅⁷⁻.

(Tri­phenylarsine)iodinemonobromine: a charge-transfer adduct in which arsenic selectively bonds to iodine

Two saccharinate complexes: [Mn(phen)₂(sac)(H₂O)]⁺·sac^– and [Co(bipy)₂(sac)(H₂O)]⁺·sac^–

A three-dimensional network of cadmium

Redetermination of the double salt Λ-[tris­(ethyl­enedi­amine)­cobalt(III) trichloride]–sodium chloride–water (2/1/6)

The dipotassium salt of p-nitro­catechol sulfate

Bis­(tetra-n-butyl­ammonium) bis­[(mandelato)­oxo­(peroxo)­vanadate(V)] mandelic acid solvate

Di­aqua­tris­(pentane-2,4-dionato-O,O′)­holmium(III) mono­hydrate and di­aqua­tris­(pentane-2,4-dionato-O,O′)holmium(III) 4-hy­droxy­pentan-2-one solvate dihydrate

Tetra­butyl­bis­(N-phthaloyl­glycinato)­distannoxane dimer

Hexa­kis­(imidazole-N³)­nickel(II) bis­(4-meth­oxy­benzoate)

Hexa­aqua­bis­(di­methyl sulfoxide)­yttrium(III) trichloride

Bis(4-amino­pyridine)silver(I) nitrate and tris­(2,6-di­amino­pyridine)silver(I) nitrate

Sodium di­phenyl­acetate, an infinite columnar structure

Linkage isomerism of organoplatinum(II) compounds coordinated by two 1,3-di­methyl­barbiturate anions

Bis(4-hy­droxy­benzoato-O)(1,4,8,11-tetra­aza­cyclo­tetra­decane-κ⁴N)nickel(II): a three-dimensional framework built from O—H⋯O and N—H⋯O hydrogen bonds

Na₁₀(glycine)₂[H₂W₁₂O₄₂]·28H₂O

In the title compound, decasodium diglycine di­hydro­geno­do­tetra­conta­do­deca­tung­state(10−) octa­cosa­hydrate, the two glycine carboxylate O atoms coordinate three different Na⁺ cations, while the amino N atom forms hydrogen bonds with the paratungstate anion through both terminal and bridging O atoms.

Bis­[chloro­bis­(1,10-phenanthroline-N,N′)(thio­urea-S)­nickel(II)] chloride nitrate di­ethanol solvate

(Di­cyclo­hexyldi­thiophosphinato-S,S′)[2-(2-pyridyl-N)­phenyl]­mercury(II)

Sulfido-bridged rhenium–carbonyl complexes with planar and folded Re₂S₂ cores

(2-Acetyl­pyridine-κN 4-phenyl­thio­semicarbazonato-κ²N¹,S)­halogeno-trans-di­methyl­tin(IV) (halogeno = chloro and bromo)

N,N′-Di­methyl-1,4-dithiine-1,2:4,5-tetracarbox­imide and N,N′-di­methyl-1,4-diselenine-1,2:4,5-tetracarbox­imide

Structural analysis of pyrrolidinones

Tylophorine B benzene solvate

2β-Hy­droxy-4′-de­methyldes­oxy­podophyllotoxin

1-De­oxy-1-(4-fluoro­phenyl)-β-D-ribo­furan­ose, its hemihydrate, and 1-de­oxy-1-(2,4-di­fluoro­phenyl)-β-D-ribo­furan­ose: structural evidence for intermolecular C—H⋯F—C interactions

1:1 Complex of 4-nitro­benzoic acid and 4-nitro­pyridine N-oxide

Two phenanthroline hydro­chlorides

4,4′-Di­bromo­benzo­phenone at 293 and 103 K

2,6-Bis-(3-tri­fluoro­methylpyrazol-1-yl)pyridine

Weak C–H⋯O and C–H⋯N interactions in nitro­pyrazoles

The γ-form of n-eicosanol

3-(2-Furyl)-6-(4-methyl­phenyl)-7H-1,2,4-triazolo­[3,4-b][1,3,4]thia­diazine and its 6-phenyl analogue

Leurosine me­thio­dide–methanol–water (1/3/2)

(1R,2S)-2-[N-Methyl-N-(4-toluene­sulfonyl)amino]-1-phenylpropan-1-ol

4,17,25,26-Tetra­aza-6,9,12,15-tetra­oxa-2,19,21,24-tetra­thiatri­cyclo[18.4.1^1,4.1^17,20]hexacosa-1(25),20(26)-diene-3,5,16,18-tetraone

N-(4-Cyano­phenyl)-α-(4-meth­oxy­phenyl)­nitro­ne

Cyclomicrobuxine monohydrate

2,2-Di­methyl-1-(2,4,6-tri­nitro­phenyl)­hydrazine

Acetone-4-methyl­thio­semicarbazone at 220 K

Chiral and meso-bis­([2.2]­para­cyclo­phan-4-yl)­methane and meso-bis­([2.2]­para­cyclo­phan-4-yl) sulfide

4-(4-Hydroxy­benzyl­idene­amino)-4H-1,2,4-triazole hemihydrate

4-Chloro-N-(4-cyano-2-nitro­phenyl)-3-nitro­benz­amide

Model porphyrin precursors: 1,2,4,5-tetra­kis­(cyano­methyl)­benzene, methyl 3,4,5-tri­acet­oxy­benzoate and 2-(N-phthalimido­methyl)benzoic acid

Absolute configuration of (−)-4-(3,4-di­chloro­phenyl)-4-(2-pyridyl)­butanoic acid: essential information to determine crucial steric features of arpromidine-type hist­amine H₂ receptor agonists

Morpholine–β-iodo­phenyl­acetyl­ene (1/1) revisited: an exceptionally short I⋯N contact

(E)-5-[(4-Nitro­phenyl­hydrazono)­phenyl­acetyl]-3-phenyl­isoxazole

1-(2,4,6-Tri­methyl­phenyl)-1H-1,2,3,4-tetrazole

8-Chloro-6-phenyl-4H-[1,2,4]­triazolo­[4,3-a][1,5]­benzodiazepin-5(6H)-one

A series of three bis­[2-(methyl/tri­fluoro­methyl)-4H-3,1-benzoxazin-4-one] compounds

C C—H⋯N hydrogen bonding in 3-methylthio-4-propargylthio­quinoline

Zirconium di­hydroxide chromate

The 0D structure of Zr(OH)₂CrO₄ has been reinvestigated [Mark (1972). Acta Chem. Scand. 26, 3744–3756]. It consists of infinite nets with the composition [Zr₃(OH)₆CrO₄]_n⁴ⁿ⁺, joined together by chromate groups; the zirconium polyhedra are not influencead by the 0D phenomenon.

Ammonium di­chloro­bis­(di­methyl­glyoximato-N,N′)­iridate(III)

In the title compound, the Ir atom is octahedrally coordinated by two trans Cl⁻ and two di­methyl­glyoximate chelate ligands in the equatorial plane. A two-dimensional hydrogen-bond network between NH₄⁺ and [IrCl₂(C₄H₇N₂O₂)₂]⁻ is extended along the bc plane.

An organopalladium(II) compound including enolate oxy­gen- and sp³-carbon-bound 1,3-di­methyl­barbiturate ligands: (1,2-di­amino­ethane)­bis­(1,3-di­methyl­barbiturato)­palladium(II) 5.5-hydrate

In the title compound, the Pd atom is coordinated by two 1,3-di­methyl­barbiturate anions, one through a deprotonated tetrahedral C atom and the other through the enolate O atom.

An alkyl–palladium(II) complex with a bidentate phosphine ligand: [1,3-bis­(di­phenyl­phosphino)­propane-P,P′]­dimethyl­palladium(II) toluene hemi­solvate

In the title di­methyl­palladium(II) complex, [Pd(CH₃)₂(C₂₇H₂₆P₂)]·0.5C₇H₈, the P—Pd—P angle [93.18 (3)°] is significantly larger than that in the corresponding di­chloro complex [89.32 (3)°]. The toluene mol­ecule is disordered around an inversion centre.

Inhibition of a palladium(II) catalyst upon formation of a di-μ-chloro complex: di-μ-chloro-bis­[1,2-bis­(di­phenyl­phosphino)­ethane-P,P′]dipalladium(II) bis­(tetra­fluoro­borate) bis­(deutero­chloro­form) solvate

The title compound contains a centrosymmetric dimeric cation and it is formed upon slow evaporation of a solution containing bis­(aceto­nitrile)­bis­[1,2-bis­(di­phenyl­phosphino)­ethane]­palladium(II) bis(tetra­fluoro­borate) in deuterated chloro­form. The anion and the solvent mol­ecule are slightly disordered.

4,5-Bis­(ferrocenyl­methyl­thio)-1,3-di­thiol-2-one

In (C₅H₅FeC₅H₅)₂(C₅H₄OS₄), the values of the geometric parameters of the ferrocene and 1,3-di­thiol-2-one (dmio) moieties are within normal ranges.

A pseudosymmetric triclinic modification of tri­phenyl­tin iso­propylxanthate

All three independent mol­ecules in the triclinic modification of (O-iso­propyl di­thio­carbonato-S)­tri­phenyl­tin show tetrahedral coordination at their Sn atoms. Bond dimensions involving the Sn atoms are similar to those found in the monoclinic modification of the same compound. Two of the independent mol­ecules are related by a pseudo-translation allowing a stacking fault that reduces the intensities of h + k odd reflections.

{2-[(3-Amino­propyl)­amino­propyl­imino­methyl]­imidazol­ato-N,N′,N′′,N′′′}­(methanol-O)­copper(II) per­chlorate

In the title compound, four N atoms from the deprotonated ligand derived from bis(3-amino­propyl)­amine and 2-imidazole­carbox­aldehyde are coordinated to the Cu atom. The methanol O atom occupies one axial position with a Cu—O bond distance of 2.295 (2) Å.

Bis­(ethyl­enedi­amine-N,N′)(pyrimidine-2-carboxyl­ato-N¹,O)­cobalt(III) bis­(tri­fluoro­methane­sulfonate) dihydrate

In the title compound, the coordination geometry of the Co^III atom is only slightly distorted from regular octahedral, and the racemic nature of the material was confirmed by X-ray structure analysis.

A 1:1 adduct between di­methyl­tin dibromide and N-methyl­pyrrolidinone (NMP)

The tin coordination in di­bromo­di­methyl(N-methyl­pyrrolidin-2-one-O)­tin(IV) is a distorted trigonal bipyramid with the methyl groups and one bromine in equatorial, and the N-methyl­pyrrolidinone (NMP) ligand and the other bromine in apical positions. The Sn—Br bond lengths are 2.6737 (4) and 2.5256 (4) Å.

Bis­(tetra­methyl­ammonium) nona­decaoxohexamolybdenum(VI) mono­hydrate

The six Mo atoms of the title compound form a standard octahedral cage through bridging O atoms. The [Mo₆O₁₉]²⁻ anions as a whole have exact O_h symmetry with three crystallographic fourfold axes aligned along Mo—O—Mo.

The new chiral ligand 3-eth­oxy-4-[(1R,2S)-(2-hy­droxy-1,2-di­phenyl­ethyl)­amino]-3-cyclo­butene-1,2-dione

The crystal structure contains two independent mol­ecules with slightly different conformations; these are linked to form a two-dimensional network by pairs of O—H⋯O and N—H⋯O hydrogen bonds.

Triclinic polymorphs of tri­phenyl­phosphine and tri­phenyl­phosphine sulfide

New triclinic polymorphs of tri­phenyl­phosphine, C₁₈H₁₅P, (I>), and tri­phenyl­phosphine sulfide, C₁₈H₁₅PS, (II>), were crystallized. For the structure of (I>), it is obvious that the highest peaks in the final difference electron-density map are located at the `lone-pair regions' of P atoms. We have observed this effect in two further phosphorous-containing structures.

Oleana-12(13),15(16)-diene-3α,28-diyl di­acetate

The title compound is a triterpene isolated from the leaves of the plant Jacquinia Ruscifolia, found in Mexico. The absolute structure could not be established unambiguously. The saturated rings are all in chair conformations, while the unsaturated rings are half chairs.

Do­decyl 2-nitro­phenyl disulphide

Do­decyl 2-nitro­phenyl disulphide contains an intramolecular S⋯O contact of 2.623 (3) Å. The angle between the planes of the NO₂ group and the attached phenyl ring is 4.2 (3)°.

(2-Amino­eth­oxy)­bis­(2-thienyl)­boron

In the five-membered ring in the title compound, the dimensions at the B atom are N—B 1.654 (3), O—B 1.479 (3), and C—B 1.606 (3) and 1.609 (3) Å.

L-Me­thionyl-L-alanine–2-propanol (1/2)

The crystal structure of the title compound, derived from an ultrathin plate-shaped specimen, is divided into hydro­phobic and hydro­philic layers. Two peptide mol­ecules in the asymmetric unit are related by pseudo-translation, but two of the four 2-propanol mol­ecules have different relative orientations and hydrogen-bond interactions.

N,N,N′,N′-Tetra­methyl­ethyl­enedi­ammonium dichloride

The title compound has a centrosymmetric dication, which is hydrogen bonded to the anions with an N⋯Cl distance of 3.012 (3) Å.

Viox, a COX-II inhibitor

Viox {2,5-di­hydro-4-[4-(methyl­sulfonyl)­phenyl]-3-phenyl-2-furan­one} is a selective COX-II inhibitor with anti-arthritic activity. Although the mol­ecule itself is achiral, it crystallizes in a chiral space group and the absolute structure has been reliably determined.

The 1:1 complex of 4-nitro­phenol and 4-methyl­pyridine

4-Nitro­phenol and 4-methyl­pyridine are linked by an O—H⋯O hydrogen bond [O⋯N 2.668 (2) Å]. These dimers pack in a herring-bone pattern in the crystal lattice.

2,3,3a,4,5a,6,7,8-Octa­hydro-5a-methyl-6,9-methano-1H,9H-5-oxa-4-aza­cyclo­penta­[c]­indene

The regio- and stereochemistry of the title compound has been established by X-ray analysis. The molecular dimensions are normal.

4-(Di­phenyl­phosphinoyl)-3-methyl-N-phenyl-1,2-isoxazole-5-carbox­amide

The title compound, a phosphorus-substituted isoxazole ring, was prepared by a 1,3-dipolar cyclo­addition. The molecular structure is stabilized by an intramolecular N—H⋯O hydrogen bond.