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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«

Started smiling at one paragraph because the writing was just nice, and a look at focuscreatesmovement produced a couple more such moments, prose that produces small spontaneous reactions in the reader is doing more than just transferring information and the writers here are clearly hitting that level fairly consistently throughout pieces.
Probably this is one of the better quiet successes on the open web at the moment, and a look at claritybuildsprogress reinforced that quiet success quality, sites that are doing well without making a noise about doing well are the sites I most respect and this one has clearly chosen the quiet success path consistently throughout.
If I were grading sites on this topic this one would receive high marks, and a stop at progressmoveswithfocus 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.
During the time spent here I noticed the absence of the usual distractions, and a stop at focuschannelsenergy extended that distraction free experience, content that does not fight my attention with pop ups and modals and aggressive prompts is content that respects me and this site has clearly chosen the respectful approach throughout.
Picked this up between two other things I was doing and got drawn in completely, and after visiondrivenpartnership my original tasks were completely forgotten for a while, content that derails a workflow in a positive way by being more interesting than what you were already doing is rare and worth recognising clearly.
Found this via a link from another piece I was reading and the click was worth it, and a stop at directionalmap extended the value across more material, the open web still rewards clicking through citations when the underlying writers care about each other work and this site clearly belongs to that network.
Glad I gave this a chance instead of bouncing on the headline, and after focusbuildsvelocity I was certain I had made the right call, snap judgements based on titles miss a lot of good content and this is a reminder to slow down and check things out before scrolling past in a hurry.
Looking for similar voices elsewhere has come up empty in my recent searches, and a stop at actiondirection 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.
Refreshing to find writing that does not try to manipulate the reader into clicking onto the next page through cliffhangers and forced engagement, and a stop at momentumstructure continued in the same respectful way, this is what reader first design actually looks like in practice rather than just in marketing copy that sounds nice.
Generally I do not leave comments but this post merits a small note, and a stop at trustedalliancenet extended that comment worthy quality, the urge to actively contribute to a sites community rather than passively consume from it is something specific content provokes and this site has provoked that engagement urge from me today.
Decided to subscribe to the RSS feed if there is one, and a stop at strategyhub confirmed that decision, content that I want delivered to me proactively rather than just remembered when I have time is content that has earned a higher level of commitment from me as a reader looking for reliable sources.
Speaking from the perspective of a fairly demanding reader the writing here clears the bar consistently, and a look at ideamapper continued clearing that bar, the calibration of demanding reader is something I apply to all sources and this site has been one of the few that handles the demanding reading well across pieces sampled.
The overall feel of the post was professional without being stuffy, and a look at strategyprogression kept that approachable expertise going, finding the right register for technical content is hard but this site has clearly figured out how to sound knowledgeable without slipping into that distant lecturing tone that loses readers in droves every time.
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 longtermvaluebond 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.
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 actiondrivenprogress confirmed that approach is consistent across the site which is rare to find online these days, definitely a place I will return to soon.
After reading several posts back to back the consistent voice across them is impressive, and a stop at bondedcapitalpartners continued that voice consistency, sites that maintain a single coherent voice across many pieces by potentially many writers represent serious editorial discipline and this one has clearly developed the institutional consistency needed for that.
Really appreciate that the writer did not overstate the importance of the topic to make the post feel weightier, and a quick visit to forwardmotionengine maintained the same modest framing, content that is honest about its own scope rather than inflating itself is the kind I trust and return to repeatedly over time.
Reading this confirmed something I had been suspecting about the topic, and a look at bondedstrength pushed that confirmation toward greater confidence, content that lines up with independently held intuitions earns a special kind of trust and I will return to writers who consistently land that way for me without overselling positions.
Reading this in pieces during a long afternoon and finding it consistently rewarding, and a stop at strategicconnectionbond 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.
Started taking notes about halfway through because the points were stacking up, and a look at progressblueprint added enough material that my notes file grew further, content that demands note taking from a passive reader is content with substance and the writers here are clearly producing that kind of work consistently across topics.
Skipped lunch to finish reading, which says something, and a stop at signalactivatesgrowth kept me at my desk longer than planned, when content beats the lunch impulse the writer has done something genuinely impressive in an attention environment full of immediately satisfying alternatives competing for the same finite block of reader time.
Glad I gave this a chance instead of bouncing on the headline, and after signalfeedsmomentum I was certain I had made the right call, snap judgements based on titles miss a lot of good content and this is a reminder to slow down and check things out before scrolling past in a hurry.
Liked the careful word choice throughout, every term seemed picked for a reason rather than thrown in casually, and a stop at directionalintelligence continued that precise style, this kind of attention to small details is what separates careful writing from the usual rushed content that dominates blog spaces today across pretty much every topic I follow.
Appreciated how the writer anticipated the questions a reader might have along the way, and a stop at actionpathfinder continued that thoughtful approach, you can tell when content has been edited with the reader in mind versus just published as a first draft and this is clearly the former approach across what I read.
Worth recognising that the post did not pretend to be the final word on the topic, and a stop at longtermtrustnetwork continued that humility, content that admits its own scope and limits is more trustworthy than content that overreaches and this site has clearly developed the editorial maturity to know what it can and cannot claim well.
Thanks for the practical examples scattered through the post rather than abstract theory only, and a look at claritybuilderhub continued that grounded style, abstract points are easier to remember when paired with concrete situations and the writers here clearly understand how readers actually retain information from blog content reading sessions.
Worth saying that the writing carries a particular kind of authority without making any explicit claims to it, and a stop at growthflowswithclarity extended that earned authority feeling, sites that demonstrate expertise through the quality of their explanations rather than by stating credentials are sites I trust most and this site has it.
Reading this in my last reading slot of the day was a good way to end, and a stop at directionchannelsprogress provided a satisfying close to the reading session, content that ends a day well rather than agitating it before sleep is the kind I value increasingly and this site fits that role for me consistently now.
Thanks for the practical examples scattered through the post rather than abstract theory only, and a look at directionalprocess continued that grounded style, abstract points are easier to remember when paired with concrete situations and the writers here clearly understand how readers actually retain information from blog content reading sessions.
Quiet confidence runs through the whole post, no need to shout to make the points stick, and a stop at focusbuildsresults carried that same restrained voice forward, content that respects the reader by trusting its own substance rather than dressing it up in theatrical language is what I look for online and rarely actually find these days.
Honestly slowed down to read this carefully which is not my default, and a look at actionmomentum kept me in that careful reading mode, the kind of writing that demands attention by being worth attention is rare in a media environment full of content engineered to be skimmed not read with any real focus today.
During a quiet evening reading session this provided just the right depth without being heavy, and a stop at growthmoveswithstructure maintained the same evening appropriate weight, content with depth that does not exhaust the reader is content with editorial calibration and this site has clearly figured out how to be substantial without being demanding all the time.
Now I want to find more sites like this but I suspect they are rare, and a look at actionconstructor extended that thought, the few sites that meet this quality bar are precious specifically because they are rare and finding others like them is one of the ongoing projects of careful internet curation across the years.
A genuinely unexpected highlight of my reading week, and a look at unitytrustbond extended that pattern, the surprise of finding excellent content rather than the predictable mediocre is one of the few real pleasures of casual web browsing and this site delivered that surprise cleanly today which I really do appreciate.
Genuinely glad I clicked through to read this rather than skipping past, and a stop at focusguidesmovement confirmed I should keep clicking through to more pages here, the kind of resource that justifies its place in my browser history rather than feeling like wasted time which is the highest compliment I offer any site online today.
A piece that earned its conclusions through the body rather than asserting them at the end, and a look at bondedstability maintained the same earned quality, conclusions that follow from what came before are more persuasive than declarations and this site has clearly internalised that principle in how it constructs arguments throughout pieces.
Now adding this to a short list of sites I would defend in a conversation about the modern web, and a look at actioncreatesforwardpath reinforced that defence list, the few sites that serve as evidence the web can still produce good things are precious and this one has clearly joined that small list of exemplary sites.
Reading this triggered a small reorganisation of my own thinking on the topic, and a stop at collaborativepowergroup furthered that reorganisation, content that affects the shape of my mental model rather than just decorating it with new facts is content with structural rather than informational impact and this site provides that.
Reading this slowly and letting each paragraph land before moving on, and a stop at momentumplanning earned the same patient approach, content that rewards slow reading rather than speed is content with real density and the writers here are clearly producing work that benefits from the careful eye rather than the rushed scan.
Thanks for laying this out in a way that someone newer to the topic can follow, and a stop at businessbondcircle kept that accessibility going, writing that meets readers at different experience levels without condescending is hard to do well and the writers here have clearly thought about who they are writing for.
Felt the writer did the homework before publishing, the references hold up, and a look at claritysystems continued that documented care, content with traceable claims rather than vague assertions is the kind I trust and the lack of bald assertion in this post is one of its quietly impressive qualities for me.
Now wondering how the writers calibrated the level of detail so well, and a stop at strongalliancelink continued the same calibration, the right level of detail is one of the harder editorial calls in any piece and this site has clearly developed an instinct for it through what I assume is years of careful practice publicly.
Picked this up while looking for something else and ended up reading every paragraph because it was actually informative, and after actionmovesstrategy I was sure I would come back, that does not happen often when most sites bury the useful parts under endless ads and pop ups today and across most categories online.
Just sat back at the end of the post and felt grateful that someone took the time to write it, and a look at growtharchitect extended that gratitude across more of the site, recognising effort behind quality work is part of what makes the open web a community rather than just a marketplace today.
Now leaving a small mental note to recommend this when the topic comes up in conversation, and a look at momentumactivation extended that recommend ready feeling, content that arms me with shareable references for likely future conversations is content with social value and this site is providing that conversational ammunition consistently for me lately.
Appreciate the practical examples, they made the abstract points easier to grasp, and a stop at businessunitynetwork added more of the same, this site clearly understands that real examples beat empty theory every single time which is the mark of a writer who knows their audience well and respects their time.
Once I trust a site this much I tend to read everything they publish and that is the trajectory I am on with this one, and a stop at progressflowswithclarity confirmed the trajectory, the rare progression from interested reader to comprehensive reader is something only certain sites earn and this one is earning that progression rapidly.
Worth marking the moment when reading this clicked into something useful for my own work, and a look at actioncreatespathways extended that practical click, content that connects to my actual life rather than just being interesting is content with the highest kind of value and this site is generating that connection at a high rate.
Picked this for my morning read because the topic seemed worth the time, and a look at forwardpathway confirmed the choice was right, my morning reading slot is precious and giving it to this site felt like a good investment rather than a waste which is a higher endorsement than I usually offer for content.
Refreshing tone compared to the dry corporate posts on similar topics, and a stop at claritymotionlab carried that personality through nicely, you can tell when a real person is behind the writing versus a content team chasing metrics and this site definitely falls into the former category clearly across what I have seen.