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Colour and Constitution. Part VIII–Some Colour Problems from the Viewpoint of Resonance Theory *
Author(s) -
HODGSON H. H.
Publication year - 1946
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1946.tb02418.x
Subject(s) - resonance (particle physics) , constitution , foundation (evidence) , philosophy , epistemology , physics , quantum mechanics , law , political science
Summary H. E. Armstrong's quinonoid and triple colour‐centre hypotheses are discussed from the standpoint of modern resonance theory, on which the quinonoid system is only one type of oscillating system which can exhibit resonance. The older theory fails completely to explain the colours of the aliphatic nitrosocompounds and of the absence of colour in pp ′‐quinonediimine, as well as the enhanced colour of quinhydrone. The earlier attempts, however, laid the foundation for the later quasi‐quantitative theory. That Armstrong should take iodoform as a reference substance in his wider generalisation indicated beyond doubt the necessity for a theory such as that provided by the concept of resonance.