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Molecular Structure of the Complex of Octano‐8‐lactam with Magnesium Bromide
Author(s) -
Kříž Jaroslav,
Dybal Jiří,
Kurková Dana,
Prokopová Irena,
Hroch Zdeněk
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011101)202:17<3371::aid-macp3371>3.0.co;2-e
Subject(s) - chemistry , lactam , bromide , molecule , polymerization , magnesium , polymer chemistry , infrared spectroscopy , nmr spectra database , nuclear magnetic resonance spectroscopy , crystallography , spectral line , stereochemistry , inorganic chemistry , polymer , organic chemistry , physics , astronomy
Octano‐8‐lactam forms a complex with magnesium bromide, which could be of importance in elucidating the mechanism of anionic polymerization of the lactam initiated by Grignard compounds. The complex was obtained in pure form and analyzed using thermal analysis (DSC and TGA), multinuclear NMR and IR spectroscopy. Analysis of 1 H, 13 C, 14 N and 15 N NMR spectra, relaxations and PGSE measurements, as well as IR spectra and well‐corresponding theoretical calculations, showed that six molecules of octano‐8‐lactam and one MgBr 2 molecule form a complex with high symmetry. Two different forms of the complex were found, one of them strongly predominating.