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The X‐ray diffraction of molecular compounds of 2‐aminopyridine with long chain saturated and unsaturated fatty acids
Author(s) -
Skau Evald L.,
Mod Robert R.,
Magne Frank C.,
O’Connor Robert T.
Publication year - 1972
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02582485
Subject(s) - chemistry , molecule , 2 aminopyridine , elaidic acid , 4 aminopyridine , orthorhombic crystal system , crystallography , fatty acid , stereochemistry , organic chemistry , crystal structure , linoleic acid , potassium channel , biology , biophysics
X‐Ray diffraction measurements of long and short spacings are reported for the crystalline 1:1 and 4:1 molecular compounds of 2‐aminopyridine with the C 10 to C 18 saturated fatty acids and the 1:1 and 2:1 compounds of oleic, elaidic, alpha‐eleostearic and beta‐eleostearic acids. Data are also reported for 2‐aminopyridine, α‐eleostearic acid and β‐eleostearic acid. The angle of tilt of the 1:1 saturated compounds is 42°15′. The long spacings of the 4:1 compounds indicate a unit cell length of four molecules of fatty acid and one molecule of 2‐aminopyridine with an angle of tilt of 62°15′. The contribution of the 2‐aminopyridine to the length of a molecule of the 1:1 compounds is ca. 6 Å, the distance between the NH 2 and the CH 2 in the para position. In the 4:1 and 2:1 compounds it is ca. 3 Å, the distance between the NH 2 and the ring nitrogen.