User:Lipidmonolayer1/Pnictatetrahedranes/AnaFlorescu Peer Review

General info
Lipidmonolayer1
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 * Link to draft you're reviewing:
 * Link to the current version of the article (if it exists)
 * Pnictogen-substituted tetrahedranes :

Evaluate the drafted changes
(Compose a detailed peer review here, considering each of the key aspects listed above if it is relevant. Consider the guiding questions, and check out the examples of what feedback looks like.)

The lead section accurately reflects the pnictogen-substituted tetrahedranes topic. There is significant notability of the topic. The sources are reliable, comprehensive, and backed up by secondary ones. The tone is neutral, and the article starting with the historic context gives reliability. All images look good and on-point, the descriptions are well-done in the main text. Overall, great development of the topic and logic connections between different synthetic steps.

A couple of suggestions for article improvement

In the history subsection, paragraph to I would replace "the addition of pnictogens to the tetrahedral core" to "the tetrahedral carbon replacement with a pnictogen". This way, you make clear the pnictogens are not added as substituents bound to the core.

I would rephrase the synthetic sentences to make them more cohesive and less like an experimental procedure: "The addition of sodium hexamethyldisilazide deprotonates the phosphorus. Triphenylborane then bonds to the phosphorus" --> "The addition of sodium hexamethyldisilazide deprotonates the phosphorus, followed by triphenylborane bonding to the phosphorus atom."

In here there's a comma missing: "Ni(CO)4, upon addition of 1 equivalent of tert-butylphosphaacetylene (tBuCP) loses two carbon monoxide ligands." -->"Ni(CO)4, upon addition of 1 equivalent of tert-butylphosphaacetylene (tBuCP), loses two carbon monoxide ligands."

Avoid using the phrase "was used" twice in the same sentence one after another: "Due to the similarity of HCP3 to AsP3, the [NbII(ODipp)3(P3)]- that was used in the synthesis of AsP3 was used for the synthesis of HCP3." --> "Due to the similarity of HCP3 to AsP3, the [NbII(ODipp)3(P3)]- used in the synthesis of AsP3 was employed in the synthesis of HCP3 as well." I believe it is clear that the Nb-derivative was used in both syntheses if you write it this way.

Replace "To add -CH to [P3]3-, bromodichloromethane undergoes halogen abstraction, leaving a carbon-centered radical." with "To add a CH-group to [P3]3-, bromodichloromethane undergoes halogen abstraction, leaving a carbon-centered radical." In the next sentence, make sure to delete 1 of the "instead".

In the reactivity section: "Addition of W(CO)5(THF) to tBu3C3P generates a phosphorus-containing housene analogue." Is there another way to describe a "housene" and put in parenthesis? Maybe you could give the bicyclo description of wiki-linked housane and say unsaturated. As a chemist, I didn't feel this familiar with the housene name.

In the dimerization subsection: "Upon addition of another equivalent of the same nickel complex, a butterfly-like geometry is adopted, which two nickel atoms coordinated to opposite phosphorus atoms and two coordinated to adjacent phosphorus atoms on different four membered rings." Replace "which" with "with". You could also replace the comma with colons and give it a more descriptive tone. In "The reaction to the butterfly structure is believed to dependent on kinetic access to the middle P-P bond." choose either "depend" or "be dependent".

I would edit this "This product can be used to do further chemistry." to "This product serves as a potent intermediate in developing further chemistry". Combine "Heating the product at 60 °C for 3 hours causes the expulsion of a di-tert-butylacetylene. P-P bonds are reformed." into a sentence.

Here, "The reaction of tBu2C2P2 with [K([18]crown-6)][Fe(anthracene)2] in toluene and THF causes the expulsion of one anthracene and the cage opening of tBu2C2P2 to form the replacement 1,2-diphosphacyclobutadiene ligand." I believe there should be a replacement adduct formed, not ligand.

This, "IBO calculations and crystallographic evidence support the assignment of double bonding to the P=C bond to the NHC." would sound better as "IBO calculations and crystallographic evidence support the assignment of double bonding NHC-stabilized P=C unit." Otherwise, it's a bit unclear to me how the P=C bonding wrt NHC is.

"Upon the addition of 2 equivalents of TMC (2,3,4,5-tetramethylimidazolin-2-ylidene) in benzene, both phosphorus atoms bonding to THC." Here, change "bonding" to "bond".

What does "sans" mean here: "The isolability of tBu3C3P was attributed to the controversial hydrogen-hydrogen bonds (HHB). Each HHB of the tert-butyl network were calculated to contribute 0.7 kcal/mol of stabilization, sans steric repulsion."?

In the "Substitution by Heavier Congeners" section, I would position the big graph on the whole page and keep the text as a simple small paragraph above or below.

I believe there is a comma after "i.e.": "Second order perturbations suggest that the key non-Lewis interactions are C-C to C-R* and C-Pn to C-H* (i.e. cage-opening), as well as interactions to Pn-C*."