User:Karamoulton/Titanocene bis(trimethylsilyl)acetylene/Colleenmcaloon Peer Review

General info
Kara Moulton
 * Whose work are you reviewing?


 * Link to draft you're reviewing
 * User:Karamoulton/Titanocene bis(trimethylsilyl)acetylene
 * Link to the current version of the article (if it exists):
 * Link to the current version of the article (if it exists):

Evaluate the drafted changes
Titanocene bis(trimethylsilyl)acetylene Peer Review

History:


 * It might be helpful to include a chemdraw of the structure in addition to the optimized structure/crystal structure because sometimes it can be hard to visualize the molecule based off of that and then chemical formula alone.
 * I really like the story here! I think that the synthesis/reaction schemes here would benefit from one ChemDraw or reaction scheme to orient your reader as to how the compound was originally synthesized or what the isolobal analogy looked like for the cyclopropenyl cation and how that was rationalizd for the silacyclopropanes. It might just make it easier for the uninitiated reader to gain more out of the introduction instead of having to look things up.

Structure and Characterization:


 * I'm not sure if you can get this data from the crystal structure you have, but if there is anything notable about any of the bond lengths or angles in the crystal structure, that can sometimes provide an interesting comment. For example, if you can get the C=C bond length and compare it to normal olefins, it would make an interesting comment about the nature of the double bond (is it true double bond character?). Or you could comment on the nature of the Ti-C bond lengths - if those are the same across both carbons or if the molecule is somehow asymmetrical with respect to bond lengths.
 * For bond angles or the structure overall, you could talk about the bent nature of the TiCp2 group and how that compares to other bent di-cyclopentadiene complexes of other transition metals, etc.

Synthesis:


 * In the original synthesis, was there a reason that Rosenthal was targeting this type of compound other than its unique structural and electronic properties? Or did they intend to use the compound for some sort of novel reactivity? It could be an interesting thing to add to make the synthesis more valuable to your reader/
 * In your variations section, you say that the same compound was synthesized as a zirconium complex instead of titanium, but you wrote zinc as the metal in your ChemDraw, so make sure to fix this before publishing.
 * I'm not sure if this is possible, but it might be better to put the table of names and properties at the top of the page, so that people who are looking for quick facts can find them more quickly/easily.

Reactivity:


 * I'm not sure if this was a problem with Wikipedia itself, but it would be helpful if some of your images were larger, as the schemes are clear and helpful to your reader but they are difficult to see/understand in the current format/size.
 * For the metal-alkyne reactivity section, is the substrate the nucleophile? It might be helpful to specify nucleophile/electrophile interactions or general mechanism when discussing the basic reactivity so that when you go to talk about more complex reactivity the reader has an understanding of how the basic electronic interactions work.
 * I like how you described that the Ti(II) species is carbene-like, and it could be interesting to compare the structure and reactivity of the resulting metallacycles with those of olefin metathesis catalysts in terms of structure and reactivity.
 * In your polymerization of acetylene section, you mentioned that the polymerization of acetylene was achieved with the reagent as a precatalyst - is the active catalyst a known species? Even if it is just hypothesized, it could be interesting to include a structure of the active catalyst or catalytic cycle to see how it compares to the precatalyst in terms of structure and reactivity. Also, did they give any reason as to why 100% trans polyacetylene could be obtained in pyridien and not other solvents? Was it due to the polar nature of the solvent or some sort of pyridine coordination that changed the selectivity of the polymerization?
 * How does the oligimerization of 1-alkenes with this reagent compare to other oligomerization catalysts? Tons of these catalysts have been produced by both oil companies and academic groups (Burkhart, for example), and it could be interesting to compare linear/branched ratios and turnover numbers to these other catalysts.

IBO Analysis:


 * It would be helpful if you made some qualitative comments on the nature of the HOMO/LUMO of your molecule when you include the images. You discussed a lot of the reactivity of these compounds, and now with the visualization of these frontier orbitals it would be interesting to compare this reactivity to the nature of the frontier orbitals.

Wikipedia Peer Review Questions:

Lead:


 * Does the Lead include a brief description of the article's major sections? - Your lead is very good at orienting your reader as to what you will be discussing in general, but it would be helpful if you included a half sentene about how you will discuss structure and bonding, reactivity, etc.

Sources and References:


 * Here, I see that you have obviously cited all of your sources, but it might be helpful to include citations directly after a few sentences where you discuss the work, particularly in the introduction/longer paragraphs. It can sometimes be difficult to discern what sources are being referenced, so it makes it more challenging for your reader to find more information if they want to if they have to go find the source.