5606-18-8Relevant academic research and scientific papers
New varieties of crystalline architecture produced by small changes in molecular structure in tape complexes of melamines and barbiturates
Zerkowski, Jonathan A.,Mathias, John P.,Whitesides, George M.
, p. 4305 - 4315 (2007/10/02)
This paper describes the crystal structures of a series of seven 1:1 complexes between N,N′-bis(m-X-phenyl)-melamine and 5,5-diethylbarbituric acid (X = H, F, Cl, Br, I, CH3, and CF3). This series provides small perturbations on the
Design of organic structures in the solid state: Molecular tapes based on the network of hydrogen bonds present in the cyanuric acid-melamine complex
Zerkowski, Jonathan A.,MacDonald, John C.,Seto, Christopher T.,Wierda, Derk A.,Whitesides, George M.
, p. 2382 - 2391 (2007/10/02)
This paper describes the single-crystal X-ray structures of 1:1 complexes between seven N,N′-bis(4-X-phenyl)melamines (X = H, F, Cl, Br, I, CH3, and CF3) and 5,5-diethylbarbituric acid. These complexes crystallize as infinite tapes having components joined by triads of hydrogen bonds; the tapes pack with their long axes parallel. The crystalline architecture of these complexes - parallel tapes - serves as a structurally constrained framework with which to study physical-organic relationships between the structures of the crystals and the molecules of which they are composed. The complex with X = Br exists in polymorphic forms. One of the polymorphs is isomorphous to the X = Cl complex; the other is related to the X = I complex.
