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Is there a reason the definition of chemical element seems to vary according to the date you look at the article ? Currently it is defined as a monotypical atomic substance, but a few years ago it was the "species of atom with same atomic number" that was used. I wonder why it's not even mentioned in the article now, the Goldbook cited in the introduction gives the two. frwiki, dewiki, itwiki uses the atomic one, if I'm not mistaken.
The first one seems more complicated and actually a bit dated/historical, the second one is more convenient. The first one is « simple substance » on Wikidata and there are several wikis that have articles about that. Maybe we should sort the interwikis and move articles to the right item ? TomT0m ( talk) 19:26, 22 April 2024 (UTC)
Nucleobase is the heterocyclic variable group, nucleoside is nucleobase+sugar, nucleotide is nucleotide+phosphate. Is there a term for the parent category containing all of those? I'm working on organizing some synthetic-biology chemical pages, for which we don't have very many of any one of those three but we have some and they do form a coherent topic set. DMacks ( talk) 16:39, 1 May 2024 (UTC)
I am asking for the support of this community to move the following page from drafts to articles: /info/en/?search=Draft_talk:Baltic_Chemistry_Olympiad. That will help with increasing the coverage of chemistry competitions.
Wikipedia covers several major competitions, such as the International Chemistry Olympiad and USNCO. However, there should be more pages to raise awareness. I have written a detailed overview of the Baltic Chemistry Olympiad and Competitions. It is one of the oldest international competitions, which over 30 years generated over 180 problems for training students and popularising chemistry.
Olunet ( talk) 10:04, 11 May 2024 (UTC)
I just found ninovium article. I think this article should either be merged with Victor Ninov or with oganesson. Could somebody please take a look? ReyHahn ( talk) 13:26, 15 May 2024 (UTC)
Hi all, I am a new user I was refining Draft:Fausto Calderazzo and I have moved some of the content in the article Migratory insertion. I have also enlarged the article Insertion reaction. Could you please provide some feedback? Thank you in advance.-- Diegoriccio98 ( talk) 13:14, 17 May 2024 (UTC)
Would I be correct in my belief that the phosphate groups in DNA and RNA are chiral at P? Project Osprey ( talk) 19:44, 26 May 2024 (UTC)
Thank you both. I've added a picture to try and help explain myself. The organophosphate groups here consist of a P bonded to 4 different groups, arraigned in rough tetrahedron O=P(O-)(OR1)(OR2). If that P was a C it would undoubtedly be chiral (obviously allowing for the =O being some other comparable group that satisfies the bond order). Synpath raises the issue of resonance but that isn't really a description of the ground state, I think at most that would allow the molecule to convert between 2 or more forms, all of which would be chiral. I'm also not sure how much phosphate is able to engage in resonance anyway, the bonding around P is exceedingly complex and I barely understand it - but to my mind the process of resonance shares themes with SN2 attack (no change in overall bond number, even at the transition state). Hydrolysis reactions are incredibly slow in phosphates, the uncatalyzed hydrolysis of dimethyl phosphate proceeds at about 1 × 10−15 s−1 [1] that's a half life of thousands of years.
[resonance] would allow the molecule to convert between 2 or more forms, all of which would be chiral.there is technically no interconversion between forms in resonance. The discreet resonance contributors we draw are just the extremes the molecule could take on, and the reality is closer to the weighted average of these contributors. That's why if you have a 50/50 mix of two resonance contributors of opposite chirality the actual molecule is achiral.
An insource search shows that we currently have 70 cases where Sciencemadness.org has been used in chemistry articles. Some uses (e.g. in Copper(I) phosphide, current citation #6) have that wiki as a source for our Wikipedia article, although Sciencemadness itself usually does not cite any sources and is clearly not reliable by our standards. More worryingly, it seems that many of the instances of links to that website are to books and articles which are copyright. For example, Tetrafluorohydrazine has a citation #3 to John Drury Clark's 1972 book "Ignition" with a link to a scanned copy as a .pdf. I think we need to go through all 70 instances and either remove the cite or, if the cite itself is valid, remove the links to the copyvio. Comments? Mike Turnbull ( talk) 14:29, 28 May 2024 (UTC)
Ok, maybe we transition to a related topic. If one does not have access to basic textbooks, it is next to impossible to edit technical content. "Crystal field excitation" is not a term encountered very often. Yes, one can imagine what it is, but the phrase is not indexed in usual textbooks (Wiberg, Cotton&Wilk, Shriver). My somewhat obnoxious point is that if one is struggling to find a source for a topic, maybe that topic does not merit an article. -- Smokefoot ( talk) 17:23, 28 May 2024 (UTC)
I originally asked about this topic here in Helpdesk. It was suggested that before applying for the move of the article, there should be some discussion about how to name it.
The " Monolayer-protected cluster molecules" page is focused on the crystal structures of these nanoclusters in a list-like manner. The current tittle was generated when the page was accepted but it seems too general or ambiguous. There already exists pages like Nanocluster and Thiolate-protected gold cluster, tittles of which feel very similar, even if the contents serve a different purpose. I would call the page as "Crystallized monolayer-protected clusters" or "List of crystallized monolayer-protected clusters". In the text it was stated that "This article is designed to be a list of known structures of MPCs", therefore the new tittle would reflect more clearly the contents than the current one. What do you suggest? Iridium27 ( talk) 09:28, 30 May 2024 (UTC)
Sorry for the continuing questions in this area. Are there any reactions of organophosphates that can change the PO4 core (i.e. other than hydrolysis or transesterification)? I can't find any, beyond perhaps carbothermal reduction to elemental P. I find that surprising - it would make it the only functional group I can think of that cannot be converted into different functional group. Project Osprey ( talk) 21:35, 9 June 2024 (UTC)
There is a dispute between me and the article creator about how broad the categories for this article should be. See Talk:Fiveling#Intractable dispute over categories. – LaundryPizza03 ( d c̄) 22:50, 10 June 2024 (UTC)
Apparently Hindawi (publisher) is a huge operation, occasionally putting out some controversial journals. Here are some that appear to apply to the Chemistry project:
According to Retraction Watch the above journals (and others) have been "delisted" from Web of Science. So, I started to remove some of these references from chemistry articles. Are my removals a good idea?-- Smokefoot ( talk) 04:19, 13 June 2024 (UTC)
This tortured IUPAC nomenclature. Unfortunate. Practicing chemists do not use this term. -- Smokefoot ( talk) 16:51, 13 June 2024 (UTC)
This discussion may be of interest to the community here. XOR'easter ( talk) 20:35, 17 June 2024 (UTC)
There is a RfC on this topic at Talk:Nonmetal#RfC_on_meaning_of_nonmetal which may be of interest. Is the primary use of the term nonmetal for elements in the periodic table, see discussions in Talk:Nonmetal and also at Talk:Nonmetallic compounds and elements. Editor Sandbh is arguing that this is the case, with some other additions. Editors Johnjbarton, Ldm1954 and YBG have questioned this, and both Johnjbarton and Ldm1954 have questioned the scientific accuracy. Ldm1954 ( talk) 07:46, 18 June 2024 (UTC)
It is nearly impossible to write an overview of a topic without good sources. It can also be a disservice because the topic might be misrepresented. If one does not have access to the major works in an area, ask for help, pray that Google books gives you a glimpse to the good stuff, or forget the writing project because you will be forced to rely on old-timey literature and junky online stuff. Almost all the good on-line content is behind a paywall or is inside of major textbooks and encyclopedias. Some major works are online as pdf's, possibly illegally. March's Organic Chem is one example, Greenwood and Earnshaw for Inorganic (especially Main Group) is another. The major review journals (Chem Soc Rev, Angew, Chem Rev) have some open-access content. Org Syn is open access, but it does not provide sufficient context for an overview. -- Smokefoot ( talk) 13:32, 23 June 2024 (UTC)
Nature has been nominated for a good article reassessment. If you are interested in the discussion, please participate by adding your comments to the reassessment page. If concerns are not addressed during the review period, the good article status may be removed from the article. Z1720 ( talk) 20:11, 26 June 2024 (UTC)
In Wikipedia:Featured article candidates/1858 Bradford sweets poisoning/archive1, I objected to the image File:As4O6-molecule-from-arsenolite-xtal-3D-balls.png being labeled as "arsenic trioxide" and suggested it might be a dimer. But I'm not sure if that's actually the correct term for this kind of structure. Could somebody with better chemistry-fu than me take a look? RoySmith (talk) 01:07, 16 July 2024 (UTC)
Are there any names of chemical formulas with anions in the examples of
Pentagonal pyramidal molecular geometry? I'm not expert at chemistry, but I probably need explanation. For example, can I called IOF2−
5 as "
iodine pentafluoride with two
anions"?
Dedhert.Jr (
talk)
13:37, 18 July 2024 (UTC)
This is the
talk page for discussing
WikiProject Chemistry and anything related to its purposes and tasks. |
|
Archives: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54Auto-archiving period: 90 days |
Chemistry Project‑class | |||||||
|
Article alerts |
---|
Categories for discussion
Templates for discussion
Featured article candidates
Good article nominees
Good article reassessments
Requests for comments Requested moves
Articles to be merged
Articles to be split
Articles for creation
|
Is there a reason the definition of chemical element seems to vary according to the date you look at the article ? Currently it is defined as a monotypical atomic substance, but a few years ago it was the "species of atom with same atomic number" that was used. I wonder why it's not even mentioned in the article now, the Goldbook cited in the introduction gives the two. frwiki, dewiki, itwiki uses the atomic one, if I'm not mistaken.
The first one seems more complicated and actually a bit dated/historical, the second one is more convenient. The first one is « simple substance » on Wikidata and there are several wikis that have articles about that. Maybe we should sort the interwikis and move articles to the right item ? TomT0m ( talk) 19:26, 22 April 2024 (UTC)
Nucleobase is the heterocyclic variable group, nucleoside is nucleobase+sugar, nucleotide is nucleotide+phosphate. Is there a term for the parent category containing all of those? I'm working on organizing some synthetic-biology chemical pages, for which we don't have very many of any one of those three but we have some and they do form a coherent topic set. DMacks ( talk) 16:39, 1 May 2024 (UTC)
I am asking for the support of this community to move the following page from drafts to articles: /info/en/?search=Draft_talk:Baltic_Chemistry_Olympiad. That will help with increasing the coverage of chemistry competitions.
Wikipedia covers several major competitions, such as the International Chemistry Olympiad and USNCO. However, there should be more pages to raise awareness. I have written a detailed overview of the Baltic Chemistry Olympiad and Competitions. It is one of the oldest international competitions, which over 30 years generated over 180 problems for training students and popularising chemistry.
Olunet ( talk) 10:04, 11 May 2024 (UTC)
I just found ninovium article. I think this article should either be merged with Victor Ninov or with oganesson. Could somebody please take a look? ReyHahn ( talk) 13:26, 15 May 2024 (UTC)
Hi all, I am a new user I was refining Draft:Fausto Calderazzo and I have moved some of the content in the article Migratory insertion. I have also enlarged the article Insertion reaction. Could you please provide some feedback? Thank you in advance.-- Diegoriccio98 ( talk) 13:14, 17 May 2024 (UTC)
Would I be correct in my belief that the phosphate groups in DNA and RNA are chiral at P? Project Osprey ( talk) 19:44, 26 May 2024 (UTC)
Thank you both. I've added a picture to try and help explain myself. The organophosphate groups here consist of a P bonded to 4 different groups, arraigned in rough tetrahedron O=P(O-)(OR1)(OR2). If that P was a C it would undoubtedly be chiral (obviously allowing for the =O being some other comparable group that satisfies the bond order). Synpath raises the issue of resonance but that isn't really a description of the ground state, I think at most that would allow the molecule to convert between 2 or more forms, all of which would be chiral. I'm also not sure how much phosphate is able to engage in resonance anyway, the bonding around P is exceedingly complex and I barely understand it - but to my mind the process of resonance shares themes with SN2 attack (no change in overall bond number, even at the transition state). Hydrolysis reactions are incredibly slow in phosphates, the uncatalyzed hydrolysis of dimethyl phosphate proceeds at about 1 × 10−15 s−1 [1] that's a half life of thousands of years.
[resonance] would allow the molecule to convert between 2 or more forms, all of which would be chiral.there is technically no interconversion between forms in resonance. The discreet resonance contributors we draw are just the extremes the molecule could take on, and the reality is closer to the weighted average of these contributors. That's why if you have a 50/50 mix of two resonance contributors of opposite chirality the actual molecule is achiral.
An insource search shows that we currently have 70 cases where Sciencemadness.org has been used in chemistry articles. Some uses (e.g. in Copper(I) phosphide, current citation #6) have that wiki as a source for our Wikipedia article, although Sciencemadness itself usually does not cite any sources and is clearly not reliable by our standards. More worryingly, it seems that many of the instances of links to that website are to books and articles which are copyright. For example, Tetrafluorohydrazine has a citation #3 to John Drury Clark's 1972 book "Ignition" with a link to a scanned copy as a .pdf. I think we need to go through all 70 instances and either remove the cite or, if the cite itself is valid, remove the links to the copyvio. Comments? Mike Turnbull ( talk) 14:29, 28 May 2024 (UTC)
Ok, maybe we transition to a related topic. If one does not have access to basic textbooks, it is next to impossible to edit technical content. "Crystal field excitation" is not a term encountered very often. Yes, one can imagine what it is, but the phrase is not indexed in usual textbooks (Wiberg, Cotton&Wilk, Shriver). My somewhat obnoxious point is that if one is struggling to find a source for a topic, maybe that topic does not merit an article. -- Smokefoot ( talk) 17:23, 28 May 2024 (UTC)
I originally asked about this topic here in Helpdesk. It was suggested that before applying for the move of the article, there should be some discussion about how to name it.
The " Monolayer-protected cluster molecules" page is focused on the crystal structures of these nanoclusters in a list-like manner. The current tittle was generated when the page was accepted but it seems too general or ambiguous. There already exists pages like Nanocluster and Thiolate-protected gold cluster, tittles of which feel very similar, even if the contents serve a different purpose. I would call the page as "Crystallized monolayer-protected clusters" or "List of crystallized monolayer-protected clusters". In the text it was stated that "This article is designed to be a list of known structures of MPCs", therefore the new tittle would reflect more clearly the contents than the current one. What do you suggest? Iridium27 ( talk) 09:28, 30 May 2024 (UTC)
Sorry for the continuing questions in this area. Are there any reactions of organophosphates that can change the PO4 core (i.e. other than hydrolysis or transesterification)? I can't find any, beyond perhaps carbothermal reduction to elemental P. I find that surprising - it would make it the only functional group I can think of that cannot be converted into different functional group. Project Osprey ( talk) 21:35, 9 June 2024 (UTC)
There is a dispute between me and the article creator about how broad the categories for this article should be. See Talk:Fiveling#Intractable dispute over categories. – LaundryPizza03 ( d c̄) 22:50, 10 June 2024 (UTC)
Apparently Hindawi (publisher) is a huge operation, occasionally putting out some controversial journals. Here are some that appear to apply to the Chemistry project:
According to Retraction Watch the above journals (and others) have been "delisted" from Web of Science. So, I started to remove some of these references from chemistry articles. Are my removals a good idea?-- Smokefoot ( talk) 04:19, 13 June 2024 (UTC)
This tortured IUPAC nomenclature. Unfortunate. Practicing chemists do not use this term. -- Smokefoot ( talk) 16:51, 13 June 2024 (UTC)
This discussion may be of interest to the community here. XOR'easter ( talk) 20:35, 17 June 2024 (UTC)
There is a RfC on this topic at Talk:Nonmetal#RfC_on_meaning_of_nonmetal which may be of interest. Is the primary use of the term nonmetal for elements in the periodic table, see discussions in Talk:Nonmetal and also at Talk:Nonmetallic compounds and elements. Editor Sandbh is arguing that this is the case, with some other additions. Editors Johnjbarton, Ldm1954 and YBG have questioned this, and both Johnjbarton and Ldm1954 have questioned the scientific accuracy. Ldm1954 ( talk) 07:46, 18 June 2024 (UTC)
It is nearly impossible to write an overview of a topic without good sources. It can also be a disservice because the topic might be misrepresented. If one does not have access to the major works in an area, ask for help, pray that Google books gives you a glimpse to the good stuff, or forget the writing project because you will be forced to rely on old-timey literature and junky online stuff. Almost all the good on-line content is behind a paywall or is inside of major textbooks and encyclopedias. Some major works are online as pdf's, possibly illegally. March's Organic Chem is one example, Greenwood and Earnshaw for Inorganic (especially Main Group) is another. The major review journals (Chem Soc Rev, Angew, Chem Rev) have some open-access content. Org Syn is open access, but it does not provide sufficient context for an overview. -- Smokefoot ( talk) 13:32, 23 June 2024 (UTC)
Nature has been nominated for a good article reassessment. If you are interested in the discussion, please participate by adding your comments to the reassessment page. If concerns are not addressed during the review period, the good article status may be removed from the article. Z1720 ( talk) 20:11, 26 June 2024 (UTC)
In Wikipedia:Featured article candidates/1858 Bradford sweets poisoning/archive1, I objected to the image File:As4O6-molecule-from-arsenolite-xtal-3D-balls.png being labeled as "arsenic trioxide" and suggested it might be a dimer. But I'm not sure if that's actually the correct term for this kind of structure. Could somebody with better chemistry-fu than me take a look? RoySmith (talk) 01:07, 16 July 2024 (UTC)
Are there any names of chemical formulas with anions in the examples of
Pentagonal pyramidal molecular geometry? I'm not expert at chemistry, but I probably need explanation. For example, can I called IOF2−
5 as "
iodine pentafluoride with two
anions"?
Dedhert.Jr (
talk)
13:37, 18 July 2024 (UTC)