The debate on whether we Touch anything solid .
- Thread starter river
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Even if that was the case, chemistry isn't metaphysics. I.e., its nomenclature is not an unassailable authority for finally settling such esoteric issues, anymore than common usage dictionary definitions are (nor has ontology proper ever resolved that territory).
If you encounter text making declarations about _X_ in an absolute or independent of brain-representations and practical modeling context, then it has just detoured off into scientific realism, scientism, etc (philosophical orientations rather than the job skills of a lab profession).
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Uh... knock, knock. Via your unmitigated claim of "contiguous, discribes what is really going on between molecules and atoms" that's the degree of ontological certainty (dogma) that you're projecting upon chemistry.
Sigh... never mind. This is as futile a communication attempt as ever.
There isn't one.
I have googled "chemical meaning of contiguous". There is none.
Again, atoms can not "touch" because they have no surface.
Moderator note: river has been warned for trolling.
Claims should be supported with appropriate evidence or else retracted, as noted in the previously issued warning.
Due to accumulated warning points, river will be away from the forum for 1 week.
There isn't one.
Stop lying.
Moderator note: river has been warned for trolling.
Claims should be supported with appropriate evidence or else retracted, as noted in the previously issued warning.
Due to accumulated warning points, river will be away from the forum for another week or so.
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Meh. Strange to repeat exactly the same behaviour, expecting a different outcome to last time. Slow learner?
Claims should be supported with appropriate evidence or else retracted, as noted in the previously issued warning.
Due to accumulated warning points, river will be away from the forum for another week or so.
----
Meh. Strange to repeat exactly the same behaviour, expecting a different outcome to last time. Slow learner?
exchemist
Valued Senior Member
Of course there is no special meaning of contiguous in chemistry.
"Contiguous double bonds", in the obscure reference river dug up, merely means double bonds that are next to one another in the carbon chain of an organic molecule, i.e. without a single bond in between, so allenes rather than conjugated systems for example (which have alternating single and double bonds). So contiguous just applies to the conventional way of drawing these molecules.
In fact, these bonds most definitely do NOT touch, as, in a ...C=C=C... allene unit, the 2 π-bonds are perpendicular to one another, e.g if the left hand one has its orbital in the plane of the text, the right hand one will be above and below that plane. Conjugated systems, by contrast tend to align their π-orbitals in the same plane, as this allows the π-electrons to delocalise across all 4 atoms: C=C-C=C also has contributions from C⁺-C=C-C⁻ and C⁻-C=C-C, lowering the overall energy - and leading to some characteristic chemical reactions.
River's a mad troll - but we knew that.
"Contiguous double bonds", in the obscure reference river dug up, merely means double bonds that are next to one another in the carbon chain of an organic molecule, i.e. without a single bond in between, so allenes rather than conjugated systems for example (which have alternating single and double bonds). So contiguous just applies to the conventional way of drawing these molecules.
In fact, these bonds most definitely do NOT touch, as, in a ...C=C=C... allene unit, the 2 π-bonds are perpendicular to one another, e.g if the left hand one has its orbital in the plane of the text, the right hand one will be above and below that plane. Conjugated systems, by contrast tend to align their π-orbitals in the same plane, as this allows the π-electrons to delocalise across all 4 atoms: C=C-C=C also has contributions from C⁺-C=C-C⁻ and C⁻-C=C-C, lowering the overall energy - and leading to some characteristic chemical reactions.
River's a mad troll - but we knew that.
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Of course there is no special meaning of contiguous in chemistry.
"Contiguous double bonds", in the obscure reference river dug up, merely means double bonds that are next to one another in the carbon chain of an organic molecule, i.e. without a single bond in between, so allenes rather than conjugated systems for example (which have alternating single and double bonds). So contiguous just applies to the conventional way of drawing these molecules.
In fact, these bonds most definitely do NOT touch, as, in a ...C=C=C... allene unit, the 2 π-bonds are perpendicular to one another, e.g if the left hand one has its orbital in the plane of the text, the right hand one will be above and below that plane. Conjugated systems, by contrast tend to align their π-orbitals in the same plane, as this allows the π-electrons to delocalise across all 4 atoms: C=C-C=C also has contributions from C⁺-C=C-C⁻ and C⁻-C=C-C, lowering the overall energy - and leading to some characteristic chemical reactions.
River's a mad troll - but we knew that.
But there is a chemical understanding of contiguous . Physical , Actual touching . Look up contiguous . So you disagree with them . Why are they wrong ?.
And wouldn't they be aware of what your saying ? I would think so . And have gotten long past this by now . Hence why chemically contiguous means " actual touching " .
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They aren't wrong, river. "Contiguous" has a number of meanings. You have opted to take one of the meanings ("physical, actual touching") and assume that that is the meaning used in chemistry. That is your error.
Contiguous can mean touching, yes, but it can also means just "next to" https://www.dictionary.com/browse/contiguous, e.g. in a sequence.
The link you provided is all about "contiguous double bonds". So let's take another link about chemistry that also talks about things being "contiguous": https://goldbook.iupac.org/terms/view/C01437
You will note here that it says: "Those present in a chain in which at least three contiguous carbon atoms are joined by double bonds;..." This refers to a chain of Carbon atoms, joined by double bonds... i.e. ... C = C = C ... i.e. the precise example that CC offered previously.
Note that the Carbon atoms themselves don't touch... they are simply joined together by double bonds, the same way that a balloon might be "joined" to a person's hand by the string between them. So here we have carbon atoms that are contiguous, but they don't actually touch each other. They are simply "next to" each other in the sequence, or row of atoms in question.
This is the meaning that chemistry uses when using the word "contiguous" as applied to atoms, or double bonds in cyclic compounds etc. They use it in the meaning of "next to". This is not a special meaning to chemistry, just the application of the general definition in context.
If you continue to assert that there is a chemical understanding of contiguous, and that it is "Physical, Actual touching", then you will continue to be wrong.
You've been suspended from this site for continuing this claim of yours in an unsupported manner. Are you looking to be banned permanently?? Support your assertion, or accept that you are wrong in this matter.
I was going to query "trolling" but you have suitably qualified it as "mad" .
Wrong. Not possible.
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