Peculiarities of the crystal packing of n-alkyl side chain ureas—precursors in the synthesis of helical polycarbodiimides. Issue 46 (18th November 2015)

• Record Type: Journal Article
• Authors: Kulikov, Oleg V.; McCandless, Gregory T.; Siriwardane, Dumindika A.; Sevryugina, Yulia V.; Novak, Bruce M.
• Is Part Of: Tetrahedron letters. Volume 56:Issue 46(2015)
• Page Start: 6309
• Page End: 6313
• Publication Date: 2015-11-18
• Subjects: Self-assembly -- Hydrophobic interactions -- Ureas -- Interdigitation; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2015.05.056
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Abstract: We report here the single-crystal X-ray diffraction data collected for 10 ureas bearing alkyl side chains—precursors in the synthesis of chiral polycarbodiimides. X-ray data obtained could be used in constructing the model of interacting polymer chains (e.g., n -hexyl, n -heptyl, n -octyl, n -nonafluoropentyl, and n -heptadecafluorononyl). TGA/DSC studies confirmed relative stability of the ureas inspected. It seems probable that interdigitation pattern found in a crystal lattice of the aliphatic ureas mimics the organization of polycarbodiimide macromolecules identifiable by microscopy techniques