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Diffraction studies of molecular interaction. Low electron‐density fluctuations induced by association
Author(s) -
Brady G. W.,
Fein D. B.
Publication year - 1975
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889875010436
Subject(s) - association (psychology) , electron diffraction , chain (unit) , molecule , diffraction , electron , atom (system on chip) , electron density , position (finance) , chemistry , phase (matter) , crystallography , scattering , measure (data warehouse) , atomic physics , molecular physics , physics , optics , quantum mechanics , computer science , philosophy , epistemology , finance , database , economics , embedded system
The scattering which arises from the difference in electron density between the environment around an internal atom of a molecule in a condensed phase and one at a terminal position has been measured. The examples offered here are C atoms positioned in a chain and at the end. The results are discussed in terms of association, where an in‐register association is favored, because in this configuration attraction of the chain subunits is maximized. Consequently, the electron‐deficient chain ends also tend, on the average, to be in register. It is found that the association persists even when a diluent is added to the system. The technique is not restricted to chain‐like molecules, and can in principle be used to measure the association and dimensions of other large organic molecules.