Paraquat guest induced hydrogen-bonding modes of a hydrazide-derived bis(meta-phenylene)-32-crown-10 host in the solid state

hydrazide-derived bis(meta-phenylene)-32-crown-10 host showed a dimeric structure via quadruple N-H center dot center dot center dot O hydrogen bonds, but a polymeric structure via two N-H center dot center dot center dot O hydrogen bonds and two C-H center dot center dot center dot O hydrogen bonds at each knot in the presence of paraquat in the solid state, which led to a novel poly(taco complex) and ordering arrangement of the guest molecules indirectly. (C) 2007 Published by Elsevier Ltd.