4. Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic. нн…
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Question “4. Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic. нн…”
4. Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic. нн H H -CH3 ‘N CH >ICH3 COO-H Ph I II III IV V
Answer
H -H politin H Here, w2 6. (1) Structure Hydrogen The more acidic a bond is, the higher it will be a HMH…CH3 nod (5) Ph (19) o is alkane hydrogen. (1) Structure Hydrogen attached with PDE sp3 carbon in structure (11) and (1) hydroon attached with co a SP Carbon ). (1) Hydrogen attached Structure (1) with an sp3 carbon. It is an atom, or group of atoms. “Acidic Hydrogn” means that it has the tendency to be released as an ion. The H-atom, which is porin rial acidic, can be attached to another with high hygir electronegativity. CS Scanned using CamScanner
sp3 = spr25 Pka Most acidic (159) (IV). sp. 250). 33.S : 50% s.s character Characror sie alle 50 42 Decreasing Acidity The stability of the conjugare bases determines the acidity. How well the conjugate base can accommodate its pair of electrons determines how stable it is. The orbital’s s character will determine how close the elections are to the nuclius. A higher in energy will make the base more stable. A high level of s in an sp hybridized from the Carson the Overlap area 6 bond to snift closer to the carbon-atom. This is the protonatedamine bears (+1) Charge. The easiest way to remove Ht is when an atom is a tom+ Pka vaniu.
Here,’? More acidic tran to Irond is SlighigyIV, 155, I Protonated Hydrogen, Alkene Hydrogen Ydyn, and alkane. Here, wis more El Electronegative than c. A bond hydrogen an CH is more stable than a bond hydrogen an CH – Ti ID > 155 > 1 Pka 9.225 42 50 Hydrogen atoms attached are oxygen atoms acids. st occurs when the hy drogen atom is removed. The negative charge of left on the viel, CS Scanned using CamScanner
O;-) 10 oxygen is easily stablised due to the high electronegativity. An increase in acidity will cause the conjugate base to be more stable. [ Moins bo Resonance can increase the stability and delocalize the negative charge of the Conjugare Base. Thus increasing the audity olt
Conclusion
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