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1.  2-[(4,6-Dimeth­oxy­pyrimidin-2-yl)­oxy]benzaldehyde 
In the title compound, C13H12N2O4, the dihedral angle between the benzene and pyrimidine rings is 55.57 (13)°. The carbonyl group and the two methoxyl groups are approximately coplanar with the benzene ring and pyrimidine ring; the C—C—C—O, C—O—C—N and C—O—C—C torsion angles being −6.1 (5), −4.8 (4) and 179.9 (3)°, respectively. In the crystal, mol­ecules are linked via C—H⋯O inter­actions, forming chains propagating along [110].
doi:10.1107/S1600536812000840
PMCID: PMC3275181  PMID: 22347037
2.  [2-(1H-Indol-4-yl)eth­yl]dipropyl­amine 
In the title compound, C16H24N2, the aliphatic amine substituent is rotated almost orthogonally [C—C—C—C torsion angle = 75.7 (3)°] out of the plane of the indole unit. The amine N atom has a pyramidal configuration deviating by 0.380 (3) Å from the plane of the adjacent C atoms. All of the aliphatic groups are in extended transoid conformations. In the crystal, mol­ecules form chains along the a axis via N—H⋯N hydrogen bonds.
doi:10.1107/S1600536812015474
PMCID: PMC3344611  PMID: 22590373
3.  rac-Methyl 2-(2-formyl-4-nitro­phen­oxy)hexa­noate 
In the racemic title compound, C14H17NO6, the plane of the ester group of the methyl hexa­noate side chain makes a dihedral angle of 80.0 (2)° with the benzene ring, while the nitro group is approximately coplanar with the benzene ring [dihedral angle = 10.3 (2)°]. In the crystal, mol­ecules form weak aromatic C—H⋯Onitro hydrogen-bonding inter­actions, giving inversion dimers [graph set R 2 2(8)].
doi:10.1107/S1600536812015462
PMCID: PMC3344521  PMID: 22590283
4.  N-Cyclo­hexyl-N-{[3-(4,6-dimeth­oxy­pyrimidin-2-yl­oxy)pyridin-2-yl]meth­yl}4,6-dimeth­oxy­pyrimidin-2-amine 
In the title compound, C24H30N6O5, the cyclo­hexyl ring adopts a chair conformation, while the remainder of the mol­ecule adopts a U-shape. The dihedral angles between the pyridine ring and the pendant pyrimidine rings are 69.04 (12) and 75.99 (9)°. The two pyrimidine rings, however, are nearly parallel to one another, with a dihedral angle of 8.56 (15)° between them. They are also involved in an intra­molecular π–π stacking inter­action with a distance of 3.6627 (18) Å between the ring centroids. In the crystal, C—H⋯O contacts link the mol­ecules into chains along the b axis.
doi:10.1107/S1600536812013104
PMCID: PMC3344196  PMID: 22606199
5.  N-(2,6-Dichloro­phen­yl)-5-methyl-1,2-oxazole-4-carboxamide monohydrate 
In the title compound, C11H8Cl2N2O2·H2O, the dihedral angle between the benzene and isoxazole rings is 59.10 (7)°. In the crystal, the components are linked by N—H⋯O and O—H⋯O hydrogen bonds into a three-dimensional network. The crystal structure is further stabilized by π–π stacking inter­actions [centroid–centroid distance = 3.804 (2) Å].
doi:10.1107/S1600536811044734
PMCID: PMC3238872  PMID: 22199725

Results 1-5 (5)