Open AccessThe Helical Structure of Diallylamine in the Solid State
Author(s) -
Chloe J. Pugh,
Craig M. Robertson,
Alexander Steiner
Publication year - 2019
Publication title -
journal of chemical crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.143
H-Index - 34
eISSN - 1572-8854
pISSN - 1074-1542
DOI - 10.1007/s10870-019-00816-2
Subject(s) - van der waals force , chemistry , crystallography , supramolecular chemistry , molecule , hydrogen bond , crystal structure , solid state , organometallic chemistry , hexagonal crystal system , stereochemistry , organic chemistry
In the solid state diallylamine forms supramolecular helices with four molecules per pitch that are held together by hydrogen bonding. The helical structure is the result of competing length scales at which hydrogen bonding and second-neighbour Van-der-Waals interactions occur. The structure features two crystallographically independent helices and four unique molecules in the asymmetric unit ( Z′ = 4). The high Z′ value is partly a consequence of the centrosymmetric pseudo-hexagonal packing of helical columns, which is incompatible with helical spacegroup symmetries. Graphic Abstract