Benzenediazonium chloride is a colorless crystalline solid, readily soluble in water, stable in cold but reacts with water when warmed, and decomposes easily in the dry state. Benzenediazonium fluoroborate is water-insoluble and stable at room temperature.
Describe the physical properties of benzenediazonium chloride and benzenediazonium fluoroborate.
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Benzenediazonium chloride is a white crystalline solid with a melting point around 5-10°C. It is sparingly soluble in water and soluble in organic solvents. Benzenediazonium fluoroborate has similar physical properties. It is a white or pale yellow solid with a lower solubility in water compared to the chloride salt. Both salts are highly reactive and sensitive to light and heat. They decompose easily, releasing nitrogen gas, and should be handled with care. These diazonium salts are important intermediates in organic synthesis, especially in the preparation of aromatic compounds and azo dyes.