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Hitos históricos de la Química Orgánica: la estructura del benceno
El 27 de enero de 1865, Kekulé presentó su propuesta de estructura del benceno en la Société Chimique de Paris, en sesión pública presidida por Louis Pasteur.
El artículo se publicó en el Bull. Soc. Chim. Paris 1865, 3, 98-110.
Una contribución clave en Química, especialmente en la Teoría Estructural de la Química Orgánica.
El artículo completo de Kekulé se puede descargar en este enlace.
Bernardo Herradón @QuimicaSociedad Director del curso de divulgación «Los Avances de la Química«

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Reading this on the train into work was a better use of the commute than my usual choices, and a stop at progressmovesintelligently extended that commute reading well, content that improves transit time rather than just filling it is content with practical benefit and this site has earned its place in my morning commute reading rotation.
Solid quality, the kind of work that holds up to a careful read rather than a quick skim, and a quick look at momentumbuildsforward kept that standard going strong, content that rewards attention rather than punishing it is something I appreciate more and more these days online across nearly every topic I follow.
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Decided not to skim despite my usual habit and was rewarded for the discipline, and a stop at forwardprogression earned the same patient approach, training myself to recognise sites that warrant slower reading is part of being a careful online reader and this site is the kind that helps me practice that skill regularly.
If I were grading sites on this topic this one would receive high marks, and a stop at progressmoveswithsignal continued earning those high marks, the informal grading I do mentally for content sources is something I take seriously even though it is informal and this site has been receiving consistent high marks across multiple sessions today.
Worth flagging that the post handled an angle of the topic I had not seen elsewhere, and a look at strongbusinessalliance extended that fresh treatment, content that finds underexplored corners of well covered subjects is genuinely valuable and this site has demonstrated that exploratory editorial approach across multiple pieces in my reading sessions today.
Well done, the kind of post that makes you slow down and actually read instead of skimming for keywords, and a look at actionmapping kept me reading carefully too, that is a sign of writing that has been crafted rather than churned out for an algorithm to see today and tomorrow.
If you asked me to point to a recent positive sign for the open web this site would be near the top, and a stop at globalpartnerbond reinforced that designation, the few sites that serve as evidence the web can still produce quality independent content are precious and this one has clearly become one for me.
If quality blog writing is dying as people sometimes claim then this site is one piece of evidence that it has not died yet, and a look at bondedpathway extended that evidence, the broader cultural question about online writing has empirical answers in specific sites and this one is contributing to a more optimistic answer overall.
A clean piece that knew exactly what it wanted to say and said it, and a look at foundationalliancebond maintained the same clarity of intention, knowing the goal of a piece before writing is something most blog content lacks and the clarity of purpose here shows up in every paragraph for any careful reader to notice.
Bookmark added with a small note about why, and a look at forwardmotionclarity prompted another bookmark with another note, the bookmarks I annotate are the ones I expect to return to deliberately rather than stumble into and this site is generating annotated bookmarks at a higher rate than my usual content sources by some margin.
Top tier post, the kind that makes you want to share the link with friends working in the same area, and a stop at ideasintomotion only made me more confident in doing that, this site is one of the better resources I have seen on the topic recently across both new and older posts.
Now thinking about whether the writer might publish a longer form work I would buy, and a look at legacytrustgroup suggested the same depth would translate, content that makes me want to pay for related work in other formats is content that has earned commercial trust as well as attention trust and this site has both clearly.
Worth pointing out that the writer made the topic feel more interesting than I had been expecting, and a look at actionmatrix continued that elevation effect, content that improves the apparent quality of its subject through skilled treatment is doing something real and this site has clearly developed that kind of editorial alchemy throughout.
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One of the more thoughtful posts I have read recently on this topic, and a stop at intentionalmomentum added even more weight to that impression, this is genuinely good content that holds its own against far better known sites in the same space without trying to imitate any of them at all which I appreciate.
Loved the writing voice here, friendly without being fake and confident without being arrogant, and a stop at progressmovesnaturally carried the same tone forward, the kind of personality that makes a reader feel welcome rather than lectured at which is a balance plenty of writers struggle to find no matter how long they have been at it.
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Recommended without hesitation if you care about careful coverage of this topic, and a stop at growthorientedbond reinforced the recommendation, the bar I set for unhesitating recommendations is fairly high and this site has cleared it through the cumulative weight of multiple consistently good pieces rather than through any single standout post which is meaningful.
Glad to have another data point on a question I am still thinking through, and a look at ideaclarity added two more, content that acknowledges its place in a wider conversation rather than pretending to settle the question alone is intellectually honest in a way that I wish was more common across the open web.
A thoughtful piece that did not strain to be thoughtful, and a look at ideasflowwithintent continued that effortless quality, when thinking shows up in writing without the writer drawing attention to it you know you are reading something genuinely considered rather than something performing the appearance of consideration which is also common online.
Closed my email tab so I could read this without interruption, and a stop at progresswithclearintent earned the same protected attention, when content is good enough to defend against the usual digital distractions you know it deserves better than the half attention most online reading gets in a typical busy day.
Closed the tab with a small sense of finality rather than the usual rushed exit, and a stop at actioncreatesmomentumflow produced the same considered closing, when reading ends with deliberate satisfaction rather than impatient skip you know the time was well spent and this site is producing those satisfying endings consistently across what I read.
This one is staying open in a tab for the rest of the day so I can come back and re read certain parts, and a look at claritychanneling suggests I will be doing the same with a few more pages here too, this is going to be a deep dive over the coming hours.
Honest take is that this was better than I expected when I clicked through, and a look at corevaluealliance reinforced that, the bar for online content has dropped so much that finding something thoughtful and well constructed feels almost noteworthy now which says more about the average than about this site itself.
Started reading without much expectation and ended on a high note, and a look at growthflowsforwardcleanly continued that arc, content that builds rather than peaks early is a sign of a writer who knows how to structure a piece for sustained reader engagement rather than relying on a strong hook to do all the work.
Felt like I was reading something written by someone who actually thinks about the topic rather than reciting it, and a look at focusnavigationhub reinforced that impression, the difference between recited content and considered content is huge and this site clearly belongs to the latter category which I appreciate as a careful reader looking for substance.
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Good post, the kind that respects the reader by getting to the point quickly without skipping the details that matter, and a short look at evergreenbondhub confirmed that approach is consistent across the site which is rare to find online these days, definitely a place I will return to soon.
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Strong recommendation from me, anyone curious about the topic should make time for this, and a look at unitedbusinessbond only sharpens that recommendation further, the kind of resource that holds up against careful scrutiny rather than crumbling at the first critical question is rare and worth pointing other people toward when the topic comes up.
Now feeling that this site is the kind I want to make sure does not disappear, and a look at signalturnsaction reinforced that quiet protective feeling, the rare sites whose disappearance would actually matter to me are the sites I want to support through return visits and recommendations and this one has joined that small protected list.
Really appreciate the confidence to make a clear point rather than hedging everything, and a quick visit to ideaflowengine maintained the same direct stance, writing that takes positions rather than equivocating is more useful even when the positions are debatable because at least the reader has something to react to clearly.
Now feeling mildly impressed in a way I do not quite remember feeling about a blog in a while, and a stop at directionshapesprogress extended that mild impression, content that produces specific positive emotional responses rather than just neutral information transfer is content with extra dimensions and this site has those extra dimensions clearly.
Following the post through to the end without my attention drifting once, and a look at professionaltrustgroup earned the same uninterrupted attention, content that holds attention without manipulating it is content with substantive pull and this site has demonstrated that substantive pull across multiple pieces in a single reading session reliably here today.
Looking for similar voices elsewhere has come up empty in my recent searches, and a stop at unitedgrowthcircle extended the search frustration, the rare site that does what no other does in quite the same way is precious and this one has clearly developed a particular approach that I have not been able to find duplicates of.
Reading this in pieces during a long afternoon and finding it consistently rewarding, and a stop at clarityinitiator fit naturally into the same fragmented reading pattern, sites whose posts can be read in segments without losing the thread are well suited to how I actually read these days and this one is built well.
Refreshing to read something where the words actually mean something instead of filling space, and a stop at forwardmotionlogic kept that going, the writing here trusts the reader to follow along without endless repetition or constant reminders of what was already said earlier in the post which I appreciate.
Found the post genuinely useful for something I was working on this week, and a look at bondedfuture added more material I will reference, content that connects to my actual life and work rather than just being interesting in the abstract is the kind I will pay attention to and return to repeatedly.
If I had to defend the time I spend reading independent blogs this site would feature in the defence, and a look at ideasbecomeforward reinforced that defensive utility, the ongoing case for non algorithmic reading is one I make to myself periodically and sites like this one provide the actual evidence that supports the case clearly.
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Worth recognising that this site does not chase the daily news cycle, and a stop at covenantpartners confirmed the longer publication arc, sites that resist the pressure to comment on every passing event are sites with genuine editorial discipline and this one has clearly chosen depth over volume which I respect deeply.
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Excellent execution from start to finish, the post never loses its rhythm and the points stay sharp, and a quick stop at directionalnavigation kept the same level going, consistency like this across a site is the marker of a serious operation rather than a casual side project running on autopilot somewhere else.
Most attempts at writing on this topic feel like they are missing something and this post finally identified what was missing, and a look at connectedleadersbond extended that diagnostic clarity, content that names what is wrong with adjacent treatments while doing better itself is content with both critical and constructive value and this site has both.
Such writing is increasingly rare and worth supporting through attention, and a stop at focusnavigation extended that supportive attention across more pages, the conscious choice to spend time on sites that produce careful work rather than convenient consumption is itself a small form of patronage and this site is receiving that conscious patronage from me.