Acidity of aldehydes - Chemistry Stack Exchange
Which is more acidic between methanal ($\ce{HCHO}$) and ethanal ($\ce{CH3CHO}$). Please explain using General organic chemistry basic concepts. My Effort: I saw the stability of the conjugate base. It would be $\ce{HCO-}$ and $\ce{CH2^{(-)}CHO}$. Due to resonance I can say that second one is more stabilized and thus a better acid.
organic chemistry - How do I determine the average carbon …
2016年4月9日 · Determine the oxidation number of carbon in (A) ethanol and (B) ethanal. Answers are (A) -2 and (B) -1. I reviewed similar question at SE: Oxidation of Carbons and I found first answer to be clear and links given in this answer to be useful. I also found a good Khan Academy video, which basically confirms all in this answer
How to convert ethanal to 2-hydroxy-3 butenoic acid?
Once you have got your acrolein from the aldol condensation of ethanal and formaldehyde you can react it with $\ce{NaCN, HCN}$ under kinetic control to get direct addition of the cyanide to the enone, forming a cyanohydrin [1]. The nitrile can then be hydrolysed in aqueous acid to yield the carboxylic acid.
Why hydrogen bonds are stronger than Van der Waals forces?
2020年12月4日 · In ethanal $\ce{CH3CHO}$, the $\ce{H}$ atom is bound to an atom (carbon) which has nearly the same electronegativity. The electron of this $\ce{H}$ atom is not moved so strongly between the two atoms $\ce{C}$ and $\ce{H}$. So this electron protects the nucleus from approaching negative charges. The H-bond in ethanal is quite weak.
nucleophilicity - Reactivity towards nucleophillic addition
2019年6月21日 · But answer in my book suggest ethanal is less reactive. Para -methoxybenzaldehyde vs para -methylbenzaldehyde. in this case due to the prescence of $\ce{OCH3}$ $\ce{O}$ will act as an electron withdrawing group as well as electron donating (resonace) whereas $\ce{CH3}$ group will only donate it's electron (resonance) thus para ...
How does copper oxidise alcohols? - Chemistry Stack Exchange
2021年5月11日 · Consider for example ethanol being heated in the presence of copper at 300 °C. How does it give ethanal as a product? Copper being in its elemental state (oxidation state 0). Since negative oxidation state is not possible for Cu, which means that it should reduce ethanol to ethane. Certainly, high temperature should have some role here.
organic chemistry - Does aldol condensation give different …
2013年12月23日 · According to this, on reaction of propanal with ethanal, basic medium yields 3-hydroxy pentanal while acidic medium yields 3-hydroxy 2-methyl butanal. Why is this statement true (if it is)? And can aldol condensation proceed in an acidic medium, since the presence of the base is necessary for the removal of the slightly acidic $\alpha$-hydrogen ...
organic chemistry - what is the cross aldol product of ethanal and ...
2019年1月2日 · $\begingroup$ The anion of ethanal may form, and may react with acetone but it can just as easily break down reforming the starting materials if that is not the most energetically favourable pathway. Don't get hung up on which anion forms fastest, it is not the factor that determines the outcome. $\endgroup$
organic chemistry - Why aren't methanal and ethanal also ketones ...
2016年11月4日 · Why aren't the aldehydes methanal/formaldehyde and ethanal/acetaldehyde also ketones? Ketones are defined by replacing any H - C - H in an alkane with C=O, which is true for both of these: methanal replaces two hydrogen atoms in methane with C=O, while ethanal does it with ethane.
Iodoform test for ethanol? - Chemistry Stack Exchange
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