Q. How many of the following reagents react with arene diazonium salts to form aryl halides?
i. $H B F_{4} /Δ$
ii. $KH S$
iii. $C u CN / K CN$
iv. $C u B r / H B r$
v. $C u / H Cl$
vi. $K I /Δ$
vii. $C H_{3} C H_{2} O H$
viii. $H_{3} P O_{2} / H_{2} O$
ix. $H B F_{4} / (N a N O_{2}, C u)$

287 127 Amines Report Error

Answer: 4

Solution:

Q. How many of the following reagents react with arene diazonium salts to form aryl halides? i. HBF4​/Δ ii. KHS iii. CuCN/KCN iv. CuBr/HBr v. Cu/HCl vi. KI/Δ vii. CH3​CH2​OH viii. H3​PO2​/H2​O ix. HBF4​/(NaNO2​,Cu)