To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

File:Historic Benzene Formulae Kekulé (original).png

From Wikipedia, the free encyclopedia

Original file(1,081 × 375 pixels, file size: 20 KB, MIME type: image/png)

Summary

Description
August Kekulé's proposal for the benzene structure in its original, taken from:
August Kekulé (1872). "Ueber einige Condensationsproducte des Aldehyds". Liebigs Ann. Chem. 162 (1): 77–124. DOI:10.1002/jlac.18721620110. "[…] man sieht daher, dass jedes Kohlenstoffatom mit den beiden anderen, mit welchen es zusammenstösst, gleich oft zusammenprallt, also zu seinen beiden Nachbarn genau in derselben Beziehung steht. Die gewöhnliche Benzolformel drückt natürlich nur die in Einer Zeiteinheit erfolgenden Stösse […] aus, und so ist man zu der Ansicht verleitet worden, Biderivate mit den Stellungen 1,2 und 1,6 müssten nothwendig verschieden sein. Wenn die eben mitgetheilte Vorstellung oder eine ihr ähnliche für richtig gehalten werden darf, so folgt daraus, dass diese Verschiedenheit nur eine scheinbare, aber keine wirkliche ist."
Date
Source Kekule_-_Ueber_einige_Condensationsproducte_des_Aldehyds.pdf
Author Friedrich August Kekulé von Stradonitz (1829–1896)
Other versions Historic Benzene Formulae Armstrong (original).png

Licensing

This work is ineligible for copyright and therefore in the public domain because it consists entirely of information that is common property and contains no original authorship.
Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.


You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

Original upload log

This image is a derivative work of File:Kekule_-_Ueber_einige_Condensationsproducte_des_Aldehyds.pdf licensed with PD-old, uploaded on 2010-08-15T16:05:17Z, by Leyo

Uploaded with derivativeFX

Captions

Kekulé's proposal for the structure of benzene (1872).

Items portrayed in this file

depicts

16 August 2010

image/png

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current16:38, 16 August 2010Thumbnail for version as of 16:38, 16 August 20101,081 × 375 (20 KB)Sponk== {{int:filedesc}} == {{Information |Description={{de|August Kekulés Vorschlag für die Benzol-Strukturformel im Original, entnommen aus:}} {{en|[[:en:Friedrich August Kekulé von Stradonitz
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage

The following other wikis use this file:

Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.