Polyene
Polyenes are poly-unsaturated organic compounds that contain one or more sequences of alternating double and single carbon–carbon bonds. These double carbon–carbon bonds interact in a process known as conjugation, which results in an overall lower energy state of the molecule.
Normally carbon–carbon double bonds which are not conjugated or only conjugated with only one or two other carbon–carbon double bonds have high enough energy that they absorb in the ultraviolet region of a spectrum, but the absorption energy state of polyenes with numerous conjugated double bonds can be lowered such that they enter the visible region of the spectrum, resulting in compounds which are coloured.
Many fatty acids are polyenes, and many dyes contain linear polyenes. Other examples of polyene compounds include beta-carotene, which is yellow to orange coloured depending on concentration, and polyene antimycotics, some of which are yellow coloured.
In organometallic chemistry polyenes are attached to metal complexes and can be altered through addition to pi ligands.
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by Pollen
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by Pollen
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by Pollen
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by Paulini
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Olive-Eyed
by: PollenI'm counting up the tolls
That I have paid for living my life
I'm patchin up the holes
Being gouged by this mass condemnation
But I won't be responsible for the things they've said and done
And I won't be responsible for any battles lost or won
Every person in this world can drop dead except for you
Every person in this world is on their side but you
And wherever you may go
I will go
I've come in from the cold
And I'm so glad that I've found my home
I'm keepin all I hold
It's not often that you get the things you've asked for
But you can't be responsible for the things they'll take away
I won't be opposable
Don't want to fight for every day
The questions you ask me have answers
Plain and clear
I will go and leave forever on the day
They find the boy who loves you half as much as I do
And until that day I will remain and never go away
But I can't be responsible for all the things they've done to you
They won't be held accountable and there's nothing you can do
They depend on the truth
Every person in this world can drop dead except for you
Every person in this world is on their side but you
And wherever you may go