4,894 research outputs found
Na7Mg13Nd(PO4)12
Investigations of the quasi-ternary system Na3PO4–Mg3(PO4)2–NdPO4 allowed us to obtain the new phosphate heptasodium tridecamagnesium neodymium dodecakisphosphate, Na7Mg13Nd(PO4)12, by applying a flux method. The crystal structure is isotypic with that of the previously reported Na7Mg13
Ln(PO4)12 (Ln = Eu, La) compounds. It consists of a complex three-dimensional framework built up from an NdO8 polyhedron (m symmetry), an MO6 octahedron statistically occupied by M = Mg and Na, and eight MgOx (x = 5, 6) polyhedra (four with site symmetry m), linked either directely by sharing corners, edges and faces, or by one of the eight unique PO4 tetrahedra through common corners. Two of the PO4 tetrahedra are statisticaly disordered over a mirror plane. The whole structure can be described as resutling from an assembly of two types of structural units, viz [Mg4
MP4O22]∞
2 layers extending parallel to (100) and stacked along [100], and [Mg4NdP4O36]∞
1 undulating chains running along the [010] direction. The six different Na+ cations (five with site symmetry m and one with 0.5 occupancy) are situated in six distinct cavities delimited by the framework. The structure was refined from data of a racemic twin
N-(2-Methoxyphenyl)phthalimide
The phthalimide fused-ring system and the phenylene ring in the title compound, C15H11NO3, are inclined at an angle of 54.2 (1)°
3-Benzyl-1-methylimidazolium picrate
In the title salt, C11H13N2
+·C6H2N3O7
−, the dihedral angles between the benzene ring in the cation and the imidazolium ring and the benzene ring of the picrate anion are 113.7 (2) and 116.3 (2)°, respectively. The imidazolium ring is nearly parallel to the benzene ring of the picrate anion, the dihedral angle between the planes being 2.6 (1)°. The nitro groups in the picrate anions are disordered (occupancy ratio 0.54:0.46). The crystal packing is stabilized by weak C—H⋯O interactions between the cation–anion pairs
(3E,5E)-1-Benzyl-3,5-dibenzylidenepiperidin-4-one
In the title compound, C26H23NO, C—H⋯O hydrogen bonds generate a ribbon structure along the a axis. These ribbons further assemble into a one-dimensional sheet parallel to the ac plane via C—H⋯π interactions. The piperidin-4-one ring adopts a sofa conformation with the 1-benzyl group in the equatorial position, and the 3- and 5-phenyl substituents stretched out on either side. The benzylidene units adopt E configurations and the 1-benzyl group is disposed towards the 3- substituent of the piperidin-4-one ring
[2,6-Bis(biphenyl-4-yl)-4-hydroxy-4-(pyridin-2-yl)cyclohexane-1,3-diyl]bis[(pyridin-2-yl)methanone]–butan-2-one (1/1)
In the title solvate, C47H37N3O3·C4H8O, the cyclohexane ring adopts a chair conformation and the plane through its near coplanar atoms forms dihedral angles of 82.58 (7), 89.27 (7), 60.30 (8), 54.54 (7) and 72.03 (7)°, respectively, with the three pyridine rings and the two attached benzene rings. The rings of the biphenyl units are twisted from each other, making dihedral angles of 35.27 (7) and 45.41 (7)°. All the rings are in equatorial orientations in the cyclohexane ring, except for the C=O-bonded pyridine ring in position 1, which is axial. Intramolecular O—H⋯N and C—H⋯O hydrogen bonds form one S(5) and three S(6) ring motifs. In the crystal, molecules are linked via C—H⋯O hydrogen bonds into a chain along the c axis. The crystal structure also features weak C—H⋯π interactions and aromatic π–π stacking [centroid–centroid distances = 3.5856 (10) and 3.7090 (9) Å]
(Benzyldiphenylphosphane-1jP)-[l-bis(diphenylphosphanyl)methane-2:3j2P:P0]nonacarbonyl- 1j3C,2j3C,3j3C-triangulotriruthenium(0)
The asymmetric unit of the title compound,
[Ru3(C19H17P)(C25H22P2)(CO)9], consists of two independent
molecules. The bis(diphenylphosphanyl)methane ligand
bridges an Ru—Ru bond and the benzyldiphenylphosphane
ligand binds to the third Ru atom. The Ru—Ru bond cis to the
benzyldiphenylphosphane ligand is the longest of the three
Ru—Ru bonds in both molecules. In the crystal, molecules are
linked by C—H� � �O hydrogen bonds, forming layers parallel
to the ac plane. C—H� � �� contacts further stabilize the crystal
packing
- …