(4-Fluorophenyl)thiourea–1,10-phenanthroline (1/1)

Crystal structure of 11-[4-(hex­yloxy)phen­yl]-1,2,4-triazolo[4,3-a][1,10]phenanthroline

The title compound, C25H24N4O, was prepared from 2-chloro-phenanthroline and hexyl-oxyphenyl-tetra-zole. The main difference between the two independent mol-ecules (A and B) in the asymmetric unit is the orientation of the all-anti-configured hex-yloxy chain: in A the C-O-C-C torsion angle is 175.9 (2)° whereas it is -88.3 (3)° in B. The benzene substitution in the bay of the triazolophenanthro...

2,9-Bis(4-pyridylmeth­oxy)-1,10-phenanthroline

In the title mol-ecule, C(24)H(18)N(4)O(2), the dihedral angles between the mean plane of the phenanthroline ring system and the pyridine rings are 82.52 (5) and 71.58 (4)°. The dihedral angle between the two pyridine ring planes is 53.54 (6)°. In the crystal structure, there are π-π stacking inter-actions between 1,10-phenanthroline rings, with centroid-centroid distances of 3.6101 (11) and 3....

(4-Fluoro­phen­yl)thio­urea–1,10-phenanthroline (1/1)

Refluxing a mixture of 1,10-phenanthroline, (4-fluoro-phen-yl)thio-urea and cadmium(II) chloride did not produce the expected mixed-ligand complex but formed a co-crystal of the two ligands, C12H8N2·C7H7FN2S. The asymmetric unit consists of two pairs of the co-crystal mol-ecules. In each (4-fluoro-phen-yl)thio-urea mol-ecule, the planes of the N2CS thio-urea units are almost perpendicular to th...

Cover vol. 11, no. 4, August 2014

1047 - 11 - 4 Jeffrey

Jeffrey C. Lagarias* ([email protected]), Dept. of Mathematics, University of Michigan, 530 Church Street, Ann Arbor, MI 48109-1043. From Apollonian circle packings to Fibonacci numbers. Apollonian circle packings are infinite packings of circles, constructed recursively from a initial configuration of four mutually touching circles by adding circles externally tangent to triples of such circl...