2017年12月3日 · But CH2I2 undergoes displacement faster than a carbenoid species can arise from CH2I2. One might imagine the carbene "CHI" forming. If if it reacts with the negative oxygen, it is the same intermediate as the first SN2 displacement.

2019年8月18日 · One of the highest refractory index in liquids is $1.79~(\pu{20 °C})$ possessed by a solution of sulfur in methylene iodide $(\ce{CH2I2}).$ Liquids are less dense than solids and this explains why it's difficult to have a refractory index greater than 2.

2023年10月21日 · In a conjugated ketone or aldehyde, nucleophiles could attack the double bond or the carbonyl carbon. I have two examples that differ in the location of initial attack, and I am wondering what dete...

2014年8月11日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2014年2月9日 · The Reimer-Tiemann reaction is known as the ortho-formylation of phenols under strongly alkaline conditions.. It's not an addition of a carbene to a double bond, like the Simmons-Smith reaction, the pyrrole to pyridine ring enlargement or the Buchner expansion, which is catalyzed by transition metals.

2015年7月16日 · Every sufficiently asymmetric molecule will be polar, but some more than others. The polarity of molecules is related to the polarity of bonds within the molecule, but just having polar bonds is not enough to create a polar molecule.

2021年7月15日 · In lectures, we were taught that ketones and aldehydes tend to have chemical shifts of around 200 ppm, while acid derivatives (carboxylic acids esters etc) tend to have values around 160–170 ppm. The

2017年3月24日 · In $\ce{CHCl3}$ the dipole moment of the $\ce{C-Cl}$ bond is towards $\ce{Cl}$. Since it has a tetrahedral geometry and the dipole moment is a vector quantity, the vector sum of all dipole moments would try to cancel out.

2016年2月10日 · The specific gravity of PTFE teflon is roughly 2.3. I have a 3/8" diameter sphere made up of entirely PTFE teflon, and I would like for it to float to the surface when dropped into a liquid.

The substrate you have provided (2-butanol) would indeed give a positive test. The iodoform test is performed in presence of iodine and potassium or sodium hydroxide, which first oxidizes the aforesaid compound to 2-Butanone.