viologens

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Viologen — The Viologens are diquaternary derivatives of 4,4 bipyridyl. The name comes from the fact that this class of compounds is easily reduced to the radical mono cation, which is intensely blue coloured. In an experimental electrolysis setup, viologen … Wikipedia
Redox — Illustration of a redox reaction Redox (portmanteau for reduction oxidation) reactions describe all chemical reactions in which atoms have their oxidation state changed. This can be either a simple redox process, such as the oxidation of carbon… … Wikipedia
Non-Kekulé molecule — Examples of non Kekulé (a) polyenes, (b) quinodimethanes, and (c) polynuclear aromatics A non Kekulé molecule is a conjugated hydrocarbon that cannot be assigned classical Kekulé structures. Since non Kekulé molecules have two or more formal… … Wikipedia

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