Tetra­aqua­bis­(hydrogen maleato)­cadmium(II)

The title compound, [Cd(C₄H₃O₄)₂(H₂O)₄], crystallizes in the centrosymmetric space group P with the Cd atom occupying an inversion centre and the monodentate hydrogen maleate anions arranged in a trans configuration. A network of intra- and intermolecular O—H...O bonds helps to stabilize the crystal packing.

3-(3,4-Methyl­ene­dioxy­phenyl)-1-(2-furyl)-3-(p-toluene­sulfonyl­amino)propan-1-one

The S atom of the sulfonyl group in the title compound, C₂₁H₁₉NO₆S, has a distorted tetrahedral geometry. The amino groups and sulfonyl groups are connected by intermolecular N—H...O hydrogen bonds. The furan ring is disordered in one of the two independent mol­ecules in the asymmetric unit.

Diaqua­bis(vanillinato-κ²O,O′)manganese(II)

In the title complex, [Mn(C₈H₇O₃)₂(H₂O)₂], the Mn^II atom is located on a twofold axis and is coordinated by two vanillinate anions and two water mol­ecules in a distorted octa­hedral geometry. The vanillinate ligand chelates to the Mn^II atom through its meth­oxy and hydr­oxy O atoms, with greatly differing Mn—O bond distances [2.3506 (14) and 2.0901 (12) Å].

Retracted: Poly[diaqua­di-μ₃-malonato-μ-pyrazine-dinickel(II)]

The title compound, [Ni₂(C₃H₂O₄)₂(C₄H₄N₂)(H₂O)₂]_n, has been prepared from the hydro­thermal reaction of nickel(II) chloride, malonic acid and pyrazine. The Ni^II atoms are linked via coordinated malonates, forming a two-dimensional network with cavities of 6.14 × 5.60 Å. These sheet structures are further connected into a three-dimensional network by bridging pyrazine ligands which have inversion symmetry, the mean distance between the layers being 7.39 Å. The coordination geometry around the Ni^II atom is a tetra­gonally elongated octa­hedron, with pyrazine N and aqua O atoms at the apical positions.

(25R)-Spirost-5-en-3-ol dimeth­yl sulfoxide solvate

In the crystal structure of the title compound, C₂₇H₄₂O₃·C₂H₆OS, inter­molecular O—H...O hydrogen bonds link the hydrox­yl groups with the dimeth­yl sulfoxide solvent mol­ecules.

3-Benzoyl­methyl­ene-1-methyl-3,4-dihydro­quinoxalin-2(1H)-one

In the title compound, C₁₇H₁₄N₂O₂, the quinoxaline ring is essentially planar and makes a dihedral angle of 9.1 (2)° with the benzene ring of the benzoyl­methyl­ene group. There are intra­molecular N—H...O hydrogen bonds and inter­molecular C—H...O inter­actions.

2-Methyl-2-(trimethyl­silyl­oxy)-3,4-dihydro-2H,5H-pyrano[3,2-c][1]benzopyran-5-one

In the title compound, C₁₆H₂₀O₄Si, the coumarin moiety is essentially planar and the pyran ring adopts a half-chair conformation.

1,4-Dimethyl-2-phenyl-3H,10aH-4-azacyclobuta[c]phenylene-3,5-dione

The title compound, C₂₂H₁₇NO₂, was obtained by the photoreaction of N-methyl-1,8-naphthalene­dicarboximide with 1-phenyl­propyne. The planar cyclo­butene ring makes a dihedral angle of 71.7 (2)° with the benzene ring of the 1,2-dihydro­naphthalene group. There are intra­molecular C—H...O hydrogen bonds, and inter­molecular C—H...O inter­actions help to stabilize the crystal structure.