A portion of the chloride was dissolved in methyl alcohol, and the
solution boiled until a drop added to cold water gave no precipitate,
of unchanged chloride. The alcohol was then distilled off, and the
thick syrup remaining, diluted with water. This solution was
neutralized with barium carbonate and filtered. On cooling, the barium
salt crystallized in shining mica-like plates, or in yellowish needles
corresponding accurately with those described by Kastle. They gave the
following analytical results.
0.2664 gram lost 0.0211 gram at 150°, and gave 0.0870 gram BaSO₄.
[ COOCH₃ ]
[ / ]
Cal. for [C₆H₃——SO₂O ] Ba + 3H₂O
[ \ ]
[ NO₂ ]2
Found
H₂O = 7.79 7.88
[anhydrous salt] Ba = 20.85 20.85
2. In like manner the barium ethyl salt was made. It also agreed
perfectly with Kastle’s description, crystallizing in fine, colorless
needles, forming in tufts from a not too concentrated solution. In case
it is necessary to concentrate these solutions, it is of advantage
to add a small quantity of alcohol to the solution as this prevents
any great amount of saponification, which otherwise takes place to a
noticeable extent.
Analysis.