title: Synthesis and structural characterization of new stiff rod oligomeric domains by X-ray crystallography and NMR.
abstract: The monomers N,N'-dibenzylbenzene-1,4-diamine (1), N,N'-dibenzylnaphthalene-1,5-diamine (2), and N,N'-dibenzylanthracene-1,9-diamine (3) were reacted with phosgene in the presence of a base to produce the corresponding N,N'-dibenzyl-1,4-bis(chlorocarbonylamino)benzene (4), N,N'-dibenzyl-1,5-bis(chlorocarbonylamino)naphthalene (5), and N,N'-dibenzyl-9,10-bis(chlorocarbonylamino)anthracene (6). These monomers were used to create zigzag type stacks, in a stepwise fashion, of trimers and 9-mers of either 1,4-diureidobenzenes ((Phe)K(3) and (Phe)K(9)) or 1,5-diureidonaphthalenes ((Nap)K(3) and (Nap)K(9)). A byproduct in the formation of (Phe)K(9) was a cyclic hexamer (Phe)K(6). NMR gave evidence of the structure in solution while X-ray crystallographic information was obtained for 5, 6, (Nap)K(3), and the cyclic (Phe)K(6).
authors.affiliation: The Danish Polymer Center, Risø National Laboratory, P.O. Box 49, Roskilde, Denmark.
authors.forename: Frederik C
authors.initials: FC
authors.lastname: Krebs
authors.forename: Mikkel
authors.initials: M
authors.lastname: Jørgensen
mesh_terms: D018360:Crystallography, X-Ray / Q000379:methods; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008958:Models, Molecular; D008968:Molecular Conformation; D009281:Naphthalenes / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry
chemical_list: D007202:Indicators and Reagents; D009281:Naphthalenes; D010636:Phenols