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Variations in crystal structure within certain isologous series of long‐chain compounds. A review of some basic features
Author(s) -
Lutton E. S.
Publication year - 1958
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/bf02639842
Subject(s) - prime (order theory) , beta (programming language) , series (stratigraphy) , stearate , row , mathematics , chemistry , crystallography , combinatorics , computer science , organic chemistry , biology , paleontology , database , programming language
Summary Crystal structures of many long‐chain compounds appear classifiable into alpha, beta prime , or beta cross‐sectional types, in which, respectively, the rows of parallel chains have axes randomly oriented, identically oriented within a row but with orientation alternating among the rows, or identically oriented throughout. Members of two isologous series are compared with particular regard to the cross‐sectional type. The series are (I) methyl palmitate (P), ethylene glyco dipalmitate (PP), glycerol tripalmitate (PPP), and m‐erythritol tetrapalmitate (PPPP); and (II) the corresponding stearates. The following behavior is observed—P: beta prime ; PP: beta prime ; PPP: alpha, beta prime, beta ; PPPP: beta prime, beta ; and similarly for the stearate series but with an additional alpha form for SSSS. Other compounds are considered with respect to tendency to form various cross‐sectional types.