Give names of the reagents to bring about the following transformations:
(i) Hexan-1-ol to hexanal
(ii) Cyclohexanol to cyclohexanone
(iii) p-Fluorotoluene to
(iv) Ethanenitrile to ethanal p-fluorobenzaldehyde
(v) Allyl alcohol to propenal
(vi) But-2-ene to ethanal

Explanation

(i) `C_(5)H_(5)NH^(+)CrO_(3)Cl(PC C)`
(ii) `K_(2)Cr_(2)O_(7)` in acidic medium
(iii) `CrO_(3)` in the presence of acetic anhydride/1. `CrO_(2)Cl_(2)2. HOH`
(iv) (Diisobutyl) aluminium hydride (DIBAL - H)
(v) PCC
(vi) `O_(3)//H_(2)O-` Zn dust