Ueber das 4′-Oxy-flavonol

Ueber Das Verschwinden Der Θ-functionen

4-[(7-Fluoro­quinazolin-4-yl)­oxy]aniline

In the mol-ecule of the title compound, C(14)H(10)FN(3)O, the bicyclic quinazoline system is effectively planar, with a mean deviation from planarity of 0.0140 (3) Å. The quinazoline heterocyclic system and the adjacent benzene ring make a dihedral angle of 85.73 (9)°. Two inter-molecular N-H⋯N hydrogen bonds contribute to the stability of the crystal structure. In addition, a weak π-π stacking...

4-Eth­oxy­phenyl 4-[(meth­oxy­carbon­yl)­oxy]benzoate

In the title compound, C(17)H(16)O(6), the two benzene rings form a dihedral angle of 54.95 (10)°. Only weak inter-molecular inter-actions are present in the crystal structure, viz. C-H⋯O hydrogen bonds and C-H⋯π inter-actions involving one of the benzene rings.

2,3-Dicyano-4-[(4-methyl­phenyl­sulfon­yl)­oxy]phenyl 4-methyl­benzene­sulfonate

In the title compound, C(22)H(16)N(2)O(6)S(2), the dihedral angle formed by the mean planes of the two benzene rings of the 4-methyl-phenyl-sulfonate groups is 21.9 (1)° and these rings form dihedral angles of 48.26 (9) and 52.73 (9)° with the central benzene ring.

6-[(4′-Ethoxycarbonyl-[1,1′-biphenyl]-4-yl)oxy]hexanoic acid

In the title compound, C21H24O5, the dihedral angle between the benzene rings is 19.57 (15)°. In the crystal, the mol-ecular arrangement makes up head-to-head centrosymmetric dimers assembled by pairs of O-H⋯O bonds; this arrangement builds a graph-set ring motif of R (2) 2(8). The dimers are linked into a tape running along the b-axis direction through C-H⋯O inter-actions. The packing is furth...