User contributions for ChemistHans
A user with 141 edits. Account created on 8 August 2006.
13 January 2019
- 05:5505:55, 13 January 2019 diff hist −7 m Sakurai reaction "carbonyl ketone" is redundant - changed to "a ketone"
- 05:5005:50, 13 January 2019 diff hist +15 m Sakurai reaction Fixed incorrect use of "allyl ketone" - changed to "enone", other minor changes
18 June 2015
- 21:1921:19, 18 June 2015 diff hist +2 Sulfenyl chloride →Related compounds: PhSeCl is a selenenyl chloride not a selenyl chloride
28 August 2014
- 16:3616:36, 28 August 2014 diff hist −13 m Selenol Some minor spelling corections - selena is not used in this context, it should be seleno (specifically, the term "selena" refers to replacement of a C by Se, whereas seleno refers to replacement of O or S by Se. Here the latter is the proper context..
10 May 2010
- 01:4801:48, 10 May 2010 diff hist +61 N-Butyllithium Solutions in ethers are not commercially available~~~~
- 01:3601:36, 10 May 2010 diff hist +186 N-Butyllithium →Transmetalations: Added the other transmetalations which were removed some time back.
17 September 2009
- 16:0716:07, 17 September 2009 diff hist +1 Methyllithium Undid revision 313177863 by Chemist1234 (talk) The original was correct, in my opinion
10 August 2009
- 22:2522:25, 10 August 2009 diff hist 0 m Camptothecin Fixed typo in link
8 August 2009
- 17:1617:16, 8 August 2009 diff hist +565 m Camptothecin Added links for total syntheses of Camptothecin
- 17:0217:02, 8 August 2009 diff hist +540 m Strychnine Added web links to other syntheses of Strychnine
1 July 2009
- 20:5120:51, 1 July 2009 diff hist +646 Talk:Holton Taxol total synthesis Added comment on acronyms
- 20:3420:34, 1 July 2009 diff hist +7 Organic synthesis →External links: The Semantic wiki link contans no useful information - commented it out
24 February 2009
- 22:4422:44, 24 February 2009 diff hist +230 m Stereospecificity Put the dangling Skell reference in its proper place
- 22:1022:10, 24 February 2009 diff hist 0 m Chemical shift →External links: Case errors fixed
- 22:0722:07, 24 February 2009 diff hist 0 m Carbon-13 nuclear magnetic resonance →External links: Case errors fixed
- 22:0622:06, 24 February 2009 diff hist 0 m Proton nuclear magnetic resonance →External links: Case error in URL
- 21:2721:27, 24 February 2009 diff hist +681 Tert-Butyllithium →Safety: The problem is not so much reaction with water in air, but with oxygen. The stability numbers were incorrect - have added better data and some citations.
21 December 2008
- 20:1720:17, 21 December 2008 diff hist +189 Talk:Stereospecificity No edit summary
25 November 2008
- 19:4019:40, 25 November 2008 diff hist +15 Halohydrin formation reaction →Reaction mechanism: stereoselectivity/stereospecificity, other fixes
- 19:0019:00, 25 November 2008 diff hist +322 Talk:Swern oxidation No edit summary
- 18:5418:54, 25 November 2008 diff hist +147 m Swern oxidation →Variations: Added Corey-Kim variation
- 18:3518:35, 25 November 2008 diff hist +19 m Reformatsky reaction Minor fixes
- 18:2818:28, 25 November 2008 diff hist 0 Halogen addition reaction →β-Halocarbocations: stereoselectivity --> stereospecificity (improper use)
- 18:2318:23, 25 November 2008 diff hist 0 Kaminsky catalyst Stereospecific ---> stereoselective (improper use)
- 18:2218:22, 25 November 2008 diff hist −1 m Halogen addition reaction →Reaction mechanism
- 18:2118:21, 25 November 2008 diff hist −83 Halogen addition reaction →Reaction mechanism: stereospecific/stereoselective fixes
- 17:5017:50, 25 November 2008 diff hist +1 Olefin fiber →Chemical: Stereospecific --> Stereoselective
- 17:4417:44, 25 November 2008 diff hist 0 m Ziegler–Natta catalyst Stereospecific ---> stereoselective (improper use)
- 16:1816:18, 25 November 2008 diff hist −10 Organoboron chemistry →Reactions: Fixed "Nitrosomethane" error, other small edits and fixes
- 15:5115:51, 25 November 2008 diff hist +287 Organoboron chemistry →Synthesis: Fixed error "Wittig helper," small edits, changed stereoselective to stereospecific
24 November 2008
- 23:1723:17, 24 November 2008 diff hist +1,229 Talk:Stereospecificity No edit summary
- 23:0323:03, 24 November 2008 diff hist +290 Stereospecificity Changed a sentence or two that gave a misleading impression
- 22:4822:48, 24 November 2008 diff hist +234 Template talk:Organic reactions No edit summary
- 22:4522:45, 24 November 2008 diff hist +24 m Template:Organic reactions Added Stereospecificity
- 22:3722:37, 24 November 2008 diff hist +269 Stereoselectivity Small elaboration, and correction of the "total" statement
10 October 2008
- 20:2020:20, 10 October 2008 diff hist +16 J-coupling →See also: Added link to Proton NMR which given some actual spectra of coupled peaks
21 July 2008
- 19:0219:02, 21 July 2008 diff hist +791 Talk:Proton nuclear magnetic resonance →Please clarify a paragraph
- 18:4018:40, 21 July 2008 diff hist +362 Proton nuclear magnetic resonance →Spin-spin couplings: Adjusted a little more on the "lines" issue (lines --> peaks), added paragraph on second-order effects
19 June 2008
- 21:2021:20, 19 June 2008 diff hist +235 m Swern oxidation →Variations: Added a bit on other types of activation.
- 20:5020:50, 19 June 2008 diff hist +1 m Formamidinium Fixed typo
- 20:4620:46, 19 June 2008 diff hist +350 Dimethyl sulfoxide →Reactions: Statement about deprotonation BY diaminocarbes was incorrect, fixed this, and elaborated a bit on dimsyl sodium
15 May 2008
- 16:5316:53, 15 May 2008 diff hist +681 Talk:Protecting group Comment on orthogonal protection
- 16:2316:23, 15 May 2008 diff hist +91 m Organic synthesis →External links: Added web site
- 16:0616:06, 15 May 2008 diff hist +345 Organotin chemistry →Hypercoordinated stannanes: Added a little more on history of hypercoordinated stannanes
3 May 2008
- 19:5719:57, 3 May 2008 diff hist +127 m N-Butyllithium →Metalation: Small enhancements, change arrow in equation
14 April 2008
- 15:1815:18, 14 April 2008 diff hist +20 m Methylsulfonylmethane Dimethyl sulfone is two words, added sulfolane to related compounds
25 March 2008
- 15:5815:58, 25 March 2008 diff hist +121 Talk:Chiral derivatizing agent →Name
- 15:1215:12, 25 March 2008 diff hist +4 Nuclear magnetic resonance spectroscopy →Magnetic inequivalence: The statement including "rapid rotation about C-C bonds" is not quite correct, The rapid rotation has nothing to do with it, it has to do with averaging of coupling
24 March 2008
- 21:4621:46, 24 March 2008 diff hist +142 m Nuclear magnetic resonance →External links: Added external link WINDNMR
- 21:2921:29, 24 March 2008 diff hist +123 m Total synthesis →External links: Added external link
