title: 3-Amino-1-(4-fluoro-phen-yl)-7-meth-oxy-1H-benzo[f]chromene-2-carbonitrile.
abstract: In the title compound, C21H15FN2O2, the furan ring has a flattened half-chair conformation [the methine C atom lies 0.136 (2) Å above the C5 plane which has an r.m.s. deviation of 0.0229 Å]. Overall, the 1H-benzo[f]chromene fused-ring system approximates a plane (r.m.s. deviation of the 14 non-H atoms = 0.049 Å). The fluoro-benzene ring is almost perpendicular to this plane [dihedral angle = 89.58 (8)°]. Zigzag supra-molecular tapes along the b axis are the most notable feature of the crystal packing. This arises through an alternating sequence of 12-membered {⋯HNC3N}2 and eight-membered {⋯HNCO}2 synthons. These are connected into a three-dimensional architecture by π-π [inter-centroid distance for centrosymmetrically related fluoro-benzene rings = 3.5181 (10) Å] and C-H⋯π inter-actions.
authors: Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia ; Applied Organic Chemistry Department, National Research Center, Dokki 12622, Cairo, Egypt.
authors: Abd El-Galil E
authors: Ael-G
authors: Amr
authors: Ahmed M
authors: AM
authors: El-Agrody
authors: Mohamed A
authors: MA
authors: Al-Omar
authors: Seik Weng
authors: SW
authors: Ng
authors: Edward R T
authors: ER
authors: Tiekink
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2013 Mar 02;69(Pt 4):o476-7
references: 23634033