Talk:Ammonium

message: About a week ago, two mentions of the iminium ion were inserted into this article, effectively stating that an ammonium ion can be called an iminium ion.  This is not correct.  An iminium ion is the result of putting a positive charge on the nitrogen of an imine.  An imine is a compound whose characteristic functional group consists of a nitrogen atom double-bonded to a carbon atom.  In order to verify that an iminium ion is not the same as an ammonium ion, I searched for iminium on the web and found the following three references that discuss iminium ions or compounds.  
*[|Iminium compounds]
:defines iminium cation as an ion with the structure R2C=N+R2, obviously not the same as an ammonium ion.
*[|Iminium cation formation]
:shows the formation of an iminium ion with the structure R1R2N+=CHR3  
*[|Imines and Enamines] - BROKEN LINK
:shows how an imine is protonated to iminium 
:R2C=NR ---> R2C=N+HR
I removed both mentions of iminium from the Ammonium article.  H Padleckas 10:32, 18 Mar 2005 (UTC)
thread_title:  Explanation for deleting iminium ion 

message: What is wrong with the double arrow in the image?  I assume you mean the double arrow in the protonation reaction image.  Should the arrows be two single-barbed arrows pointing opposite of each other?  If so, I can fix that.  A single double-headed arrow would not be correct; that is for resonance structures, not for chemical reactions (such as tautomerism).  I suspect the only reason single-barbed arrows were used in the past was laziness to write out the full arrowheads, and it became accepted as a common practice.  H Padleckas 16:19, 18 Mar 2005 (UTC)
replies: text: Yes, I think it should be single-barbed arrows ("⇌" in Unicode-compliant browsers). I cannot remember that I have ever seen a full arrowhead in a scientific publication or book. Cacycle 17:05, 18 Mar 2005 (UTC)
replies: text: I have uploaded a modified version of the image with single-barbed arrows.  H Padleckas 01:58, 19 Mar 2005 (UTC)

text: That seems to be browser / display-resolution dependent. In Mozilla 1024x768 the photo was sticking to the lower left of the reaction image, leaving a large white text-free space. Cacycle 17:05, 18 Mar 2005 (UTC)
thread_title:  Double arrow in older image and placement of new pic 

message: What is the structural formula of ammonium?Patchouli 09:32, 28 March 2006 (UTC)
thread_title:  Structural Formula of Ammonium 

message: Is ammonium a metal,which is what I was told, or is it a acid,like you say here? —The preceding unsigned comment was added by 64.12.116.201 (talk • contribs) .
:It's definitely not a metal, and it's only a very weak acid (you wouldn't usually call it an acid except in the phrases "conjugate acid" of ammonia or "acts as an acid" to a stronger base). —Keenan Pepper 01:23, 21 September 2006 (UTC)
thread_title:  Acid or metal 

message: Why ammonium amalgam section was deleted? It is a wide-known substance, see  for example. Raoul NK 16:26, 3 October 2007 (UTC)
thread_title:  Ammonium amalgam 

message: THe symbol NH
 does appear like a NH4 in M$'s Internet Explorer, instead of NH4+. Albmont (talk) 13:05, 11 August 2009 (UTC)
thread_title:  Format & reinstall 

message: See title. it says 'most simple salts are very solbule. An exeptio to this ammonium hexachloroplatinate,  — Preceding unsigned comment added by GingerGeek (talk • contribs) 14:24, 31 May 2013 (UTC)
thread_title:  Is  ammonium hexachloroplatinate a simple salt 

message: According to my textbook the standard enthalpy of formation for NH4+(aq) is -132.5 kJ/mol . Perhaps that's something that should be included.  — Preceding unsigned comment added by 172.248.197.0 (talk) 14:42, 23 October 2014 (UTC)
thread_title:  Standard Enthalpy of Formation 

message: — Assignment last updated by LynSchwendy (talk) 03:29, 14 May 2024 (UTC)
thread_title: Wiki Education assignment: EEB 4611-Biogeochemical Processes-Spring 2024