RESUMEN
The asymmetric unit of the title compound, C(14)H(14)F(4)N(2)O(4)·H(2)O, contains two crystallographically independent organic mol-ecules and two water mol-ecules. The two 1,3-diazinane rings adopt a half-chair conformation and the dihedral angles between their mean planes and those of the benzene rings are 75.65â (4)° and 49.41â (3)° in the two mol-ecules. The crystal structure is stabilized by inter-molecular O-Hâ¯O and N-Hâ¯O hydrogen bonds.
RESUMEN
In the title compound, C(16)H(17)N(3)S, the amino-thio-urea unit is nearly planar (r.m.s. deviation = 0.0425â Å), and is twisted with respect to the tolyl and phenyl rings by 57.84â (7) and 15.88â (14)°, respectively; the tolyl and phenyl rings are twisted by 65.64â (11)° to each other. Inter-molecular N-Hâ¯S and weak C-Hâ¯S hydrogen bonds are present in the crystal structure.
RESUMEN
The title compound, C(16)H(20)F(3)N(3)O(4), was prepared by reaction of 4-(dimethyl-amino)benzaldehyde, ethyl 4,4,4-trifluoro-3-oxo-butanoate and urea. In the title mol-ecule, the pyrimidine ring adopts a half-chair conformation and there is an intra-molecular hydrogen bond (O-Hâ¯O). The crystal structure is stabilized by two types inter-molecular hydrogen bonds (N-Hâ¯O and N-Hâ¯N).
RESUMEN
In the title compound, C(14)H(15)F(3)N(2)O(5), prepared by reaction of 2-hy-droxy-benzaldehyde, ethyl 4,4,4-trifluoro-3-oxobutano-ate and urea, the tetra-pyrimidine ring adopts a half-chair conformation. The crystal structure is stabilized by five inter-molecular hydrogen bonds, three O-Hâ¯O and two N-Hâ¯O, giving cyclic dimers (through three hydrogen bonds) which are further extended into a two-dimensional network.