Chapter 1: Problem 52
A meso compound (a) is an achiral molecule, which contain chiral carbons. (b) contains a plane of symmetry or a centre of symmetry. (c) is optically inactive due to internal compensation. (d) is characterized by all the above.
Chapter 1: Problem 52
A meso compound (a) is an achiral molecule, which contain chiral carbons. (b) contains a plane of symmetry or a centre of symmetry. (c) is optically inactive due to internal compensation. (d) is characterized by all the above.
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Get started for freeA free radical is (a) generated by a heterolytic cleavage (b) paramagnetic (c) generally more stable than a carbanion (d) produced in an ionic reaction
A chemical reaction is one in which old bonds are broken and new bonds are made. During the course of these changes a variety of intermediates are formed before a starting material is converted to final products. Formation of these intermediates depend on several factors like bond energies, kinetics of the reactions etc. Identify the correct statement among the following. (a) An electrophile has always a positive charge. (b) \(\mathrm{CN}^{-}\) can act as an ambident nucleophile. (c) The carbon species A formed is a methyl carbanion. (d) In \(\mathrm{CH}_{3} \mathrm{MgBr}\), the methyl group carries slight positive charge.
Identify the correct statements among the following. (a) Acetate ion ( \(\left.\mathrm{CH}_{3}-\mathrm{COO}^{-}\right)\) is a weaker base than ethoxide ion \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}\right)\). (b) HF has higher boiling point than HCl. (c) Tartaric acid (HOOC - CHOH - CHOH - COOH) has three optically active isomers. (d) \(\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{CN}\) is known as propyl cyanide as well as butane nitrile.
Choose the correct compound/species from P-S according to the property indicated in each. (P) The stronger acid of the two \(\left(\mathrm{CH}_{3}\right)_{2} \underset{(\mathrm{I})}{\mathrm{NH}}\) or \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{O} \mathrm{H}\) (Q) The stronger base of the two \(\left(\mathrm{CH}_{3}\right)_{3} \ddot{\mathrm{N}}\) or \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{O}\) (III) (R) The stronger acid of the two \(\mathrm{H}_{2} \mathrm{O}\) or \(\mathrm{H}_{2} \mathrm{~S}\) "1 (S) The stronger base of the two \(\mathrm{OH}\) or \(\mathrm{SH}\) (a) \(\mathrm{P}-\mathrm{II}, \mathrm{Q}-\mathrm{III}, \mathrm{R}-\mathrm{VI}, \mathrm{S}-\mathrm{VII}\) (b) \(\mathrm{P}-\mathrm{I}, \mathrm{Q}-\mathrm{III}, \mathrm{R}-\mathrm{V}, \mathrm{S}-\mathrm{VIII}\) (c) \(\mathrm{P}-\mathrm{II}, \mathrm{Q}-\mathrm{IV}, \mathrm{R}-\mathrm{V}, \mathrm{S}-\mathrm{VIII}\) (d) \(\mathrm{P}-\mathrm{II}, \mathrm{Q}-\mathrm{III}, \mathrm{R}-\mathrm{V}, \mathrm{S}-\mathrm{VII}\)
The number of optically active stereoisomers possible for the compound 2,3 -dihydroxy butane are (a) 4 (b) 2 (c) 6 (d) 8
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