Talk:Hydroformylation

Markovnikov ?

I am not quit sure we can speak on Markovnikov (or anti-Markovnikov) in the case of an hydride (H-). I am refering to the Markovnikov's rule which states "that with the addition of H-X to an alkene, the acid hydrogen (H) becomes attached to the carbon with the greatest number of hydrogens, and the halide (X) group becomes attached to the carbon with the fewest hydrogens". In my understanding, the hydride (H-) is more like the halide (X-, delta minus) than the acid hydrogen (H+, delta plus). Any idea ? Mandor (talk) 15:35, 20 October 2008 (UTC)

This rule has been phrased in so many ways... I think the sense in which it is being used here a typical "the hydrogen goes to the carbon with the most hydrogens". This is regardless of the mechanism; consider for example hydroboration which is generally said to be "anti-Markovnikov" for the same reason (the hydrogen is also more hydride-like). --Itub (talk) 15:28, 23 October 2008 (UTC)

Gas phase

As fas as I remember the hydroformylation of ethene with HCo(CO)₄ is one of the few if not only example of homogeneous organometallic catalysis in the gas phase. Unfortunately, I do not have any reference for that. If someone can help out with a reference, I would appreciate it. -- Linksfuss (talk) 19:39, 6 June 2012 (UTC)

Detergent / Surfactant

I thought that surfactant would better describe the use of the fatty alcohols, which are mainly converted via ethoxylation and sulfatation/neutralization to Sodium laureth sulfate. -- Linksfuss (talk) 17:34, 30 July 2012 (UTC)

You're probably right. I was thinking that readers identify with detergent, but surfactant is a technically correct term that few people understand. Also when I talk to people at Shell, they use terms like detergent precursors, not that that means much. Anyway, I have never really understood the difference between the surfactant and detergent. The Wiki articles are vague on the difference, as I recall. --Smokefoot (talk) 17:48, 30 July 2012 (UTC)

I thought that surfactant is the more general term. A detergent (at least in german) is a surfactant used in general cleaning applications (like in laundry powders or hard surface cleaners etc.). The fatty alcohols, ie if sulfated/neutralized to Sodium dodecyl sulfate, might act as detergent in laundry application, or as an emulsifier in emulsion polymerisation. -- Linksfuss (talk) 18:18, 30 July 2012 (UTC) PS: thanks for tidying up my additions!

Query

 Done

"The excess olefin and syngas is separated from the aldehyde phase in a stripper from the in the absence of a catalyst and fed back to the reactor. " Doesn't make sense to me, especially the bit I've bolded. Anyone have a suggestion? ϢereSpielChequers 16:55, 18 May 2016 (UTC)

Thanks Smokefoot for fixing that. ϢereSpielChequers 04:48, 19 May 2016 (UTC)

Idiot layman question...

...why is it called "oxo"? 193.63.174.254 (talk) 15:16, 5 October 2016 (UTC)

idiot organometallic answer: I had no idea. But I just found this explanation (by the Germans, whose predecessors invented this technology): "The term “oxo” as applied to this reaction was coined by the Ruhrchemie patent department, and was intended to suggest a general reaction for the synthesis of both aldehydes and ketones (i.e., oxo compounds). although it was later established that this flexibility is limited to ethylene." (DOI: 10.1002/anie.199421441). --Smokefoot (talk) 17:50, 5 October 2016 (UTC)

About Oxo process

What is the name of the catalyst used in this process.....? Vaishnavi Tamil (talk) 19:51, 2 June 2017 (UTC)

There are many of them, i.e. Tris(triphenylphosphine)rhodium carbonyl hydride. --Mister Pommeroy (talk) 08:35, 15 June 2019 (UTC)

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Mechanism scheme

If it's any use, I recently rediscovered an old scheme I made of the mechanism of hydroformylation: File:HCo(CO)4-catalysed-hydroformylation-scheme-3D-balls.png. Personally I find it quite hard to quickly understand the mechanism from diagrams like File:Hydroformylation Mechanism V.1.svg as it's a lot of text to parse, so I prefer 3D models.

Ben (talk) 11:13, 29 January 2022 (UTC)

If one is expert, that beautiful scheme is informative. Otherwise, I prefer ChemDraw, which are easier for most readers, I suspect. --Smokefoot (talk) 12:59, 30 January 2022 (UTC)

Maybe that's the answer, something between the two extremes, say a skeletal version of File:Hydroformylation Mechanism V.1.svg. --Ben (talk) 13:25, 31 January 2022 (UTC)