title: Halogen trimer synthons in crystal engineering: low-temperature X-ray and neutron diffraction study of the 1:1 complex of 2,4, 6-tris(4-chlorophenoxy)-1,3,5-triazine with tribromobenzene
abstract: The title complex has been studied using low-temperature X-ray (150 K) and neutron (100 K) diffraction. Molecules of the triazine host form a two-dimensional hexagonal network mediated by trigonally symmetric Cl(3) synthons having Cl.Cl interactions of 3.441 (3) A, a C-Cl.Cl angle of 165 degrees and a Cl.Cl-C angle of 105 degrees, close to the ideal values of 180 and 90 degrees, respectively. The guest molecules are of an appropriate size to fit the hexagonal networks and interact with the host via C-H.pi (phenyl) and C-Br.pi (phenyl) interactions which stabilize the overall structure. Both C-donor bond vectors are directed more closely towards the mid-point (X) of an individual aromatic bond, rather than the ring centroid, with H.X 2.817 (9) A and C-H.X 174.0 (9) degrees, and Br.X 3.353 (4) A and C-Br.X 158.1 (2) degrees.
authors: Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, England.
authors: CK
authors: Broder
authors: JA
authors: Howard
authors: DA
authors: Keen
authors: CC
authors: Wilson
authors: FH
authors: Allen
authors: RK
authors: Jetti
authors: A
authors: Nangia
authors: GR
authors: Desiraju