Account for the following (i)Primary amines `(R-NH_(2))` have higher boiling point than tertiary amines `(R_(3)N)` (ii) Aniline does not undergo friedel - crafts reaction (iii) `(CH_(3))_(2)` NH is more basic than `(CH_(3))_(3)N` in an aquaous solution

Account for the following (i)Primary amines `(R-NH_(2))` have higher b

1.	Account for the following (i)Primary amines `(R-NH_(2))` have higher boiling point than tertiary amines `(R_(3)N)` (ii) Aniline does not undergo friedel - crafts reaction (iii) `(CH_(3))_(2)` NH is more basic than `(CH_(3))_(3)N` in an aquaous solution
Answer» (i) Due to maximum intermolecualr hydrogen bonding in primary amines (due to presence of more number of H atoms) primary aminal have high BP in comp[arison to tertiary amines (ii) Aniline does not undergo Fredel craft reaction due to acid base reaction betweenn basic compound salt is formed with AI `CI_(3)` As a result ,N of aniline acquires (+) ve charge hence act strong deactivating group (iii) In `(CH_(3))` N there is maximum steric hindrance and least solvation but in `(CH_(3))` NH the solvatin is more and the syeric hindrance is less than in `(CH_(3))` although + I effect is less since there are two methyl goup dimethly amine is stilell a stronger base than trimethl amine (i) `C_(6)H_(5)NO_(2)overset(Sn_HCI)rarr(A)`

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
(b) Estimate the minimum potential difference needed to reduce `AI_(2)O_(3)` at `500^(@)C` The gibbs energy change for the decomposition reaction `2/3AI_(2)O_(3)rarr4/3AI+O_(2)`is 960 kJ (F=96500 C `mol^(-1))`

Account for the following (i)Primary amines `(R-NH_(2))` have higher boiling point than tertiary amines `(R_(3)N)` (ii) Aniline does not undergo friedel - crafts reaction (iii) `(CH_(3))_(2)` NH is more basic than `(CH_(3))_(3)N` in an aquaous solution

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