Self-Assembly through Hydrogen Bonding: Peripheral Crowding – A New Strategy for the Preparation of Stable Supramolecular Aggregates Based on Parallel, Connected CA3·M3 Rosettes was written by Mathias, John P.;Simanek, Eric E.;Whitesides, George M.. And the article was included in Journal of the American Chemical Society in 1994.Category: chlorides-buliding-blocks The following contents are mentioned in the article:
The self-assembly of two new types of stable hydrogen-bonded supramol. aggregates – bisrosettes – that are based on parallel, connected CA3·M3 rosettes is reported. The minimization of intermol. steric hindrance (peripheral crowding within the aggregate) is proposed as the structural feature responsible for selecting the cyclic CA3·M3 rosette over competing linear hydrogen-bonded networks available to the precursors. One series of aggregates – 3bis(M)2:6(CA) – is composed of 3 equiv of a bulky bismelamine [bis(M)2] and 6 equiv of a bulky isocyanurate (CA). The second series of aggregates rosette – 3bis(CA)2:6(M) – is composed of 3 equiv of a bisisocyanurate [bis(CA)2] and 6 equiv of a melamine (M) bearing two bulky substituents. The nine particles in these aggregates are stabilized by 36 hydrogen bonds in two connected CA3·M3 rosettes. Each aggregate has been characterized by 1H NMR spectroscopy, gel permeation chromatog., and vapor pressure osmometry. Correlations between the size of the substituents and the preorganization of the precursors and the stability of the aggregates derived from them are discussed. Observations from 1H NMR spectroscopy and gel permeation chromatog. indicate that aggregates comprising two connected CA3·M3 rosettes are more stable than those stabilized by a single CA3·M3 rosette, for similar extents of peripheral crowding in the rosettes. This study involved multiple reactions and reactants, such as 4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine (cas: 2272-40-4Category: chlorides-buliding-blocks).
4,6-Dichloro-N-phenyl-1,3,5-triazin-2-amine (cas: 2272-40-4) belongs to organic chlorides. Organic chlorides can be used in production of: PVC, pesticides, chloromethane, teflon, insulators. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. However, the extent of chlorination is difficult to control.Category: chlorides-buliding-blocks
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics