Phenols isoMehe: ‘in alkali. — Te chee are generally sc 
some of them, however, being known to be insoluble, 
ina paper entitled, “Alkali- insoluble Phenols”. 
the nearly complete insolubility of the prennls. in water. 
derivatives of nitrophenols. are known to show, contrary to” expectation, | 
solubility in alkalies. This phenomenon may be explained by assuming the formati 
of aci-nitro compounds which are stronger acid than the phenols. an a a: 
In the experimental part of his paper, Adams deals with derivatives of pecan and 
of salicylic aldehyde. Of the former, the following are insoluble in alkalies: — pe 101 
-azine (m. p. 226 to 227°), pxonol 2.4.6-tribromophenylhydrazone (m. p. 162°), bromo- 
pzonol phenylhydrazone (m. p. 172.5 to 173.5°), bromopzonol p- bromophenylhydr zee 
(m. p. 189.59), and bromopeonol 2.4.6-tribromophenylhydrazone (m. p. 1609 “hana rs 
Other derivatives were very difficultly soluble, some of them on heating only. 
Additive Ran of phenols. — R. F. Weinland and & Barlocher?) ie 
communication on compounds formed from phenols, phenol ethers, or salicylic e 
hyde, with neutral salts. In an earlier investigation Weinland and W. Denzel 
found that pyrocatechol combines with alkali carboxylates, with potassium benzen 
sulphonate, or calcium chloride forming compounds which were comparable - 
aquo salts, i.¢. which are so constituted that the pyrocatechol is. connected _ 
metallic atom by means of a secondary lee of one of the hydroxy oxygen ¢ 
alcohols. Furthermore, they established the ee that in addition to alti ‘ronal 
and phloroglucinol, the phenolic ethers guaiacol, eugenol, and vanillin combine it 
the potassium salts of the lower aliphatic acids thus forming similar compounds, ; an 
that equally salicylic aldehyde forms. well- “erystallising bode wily Aik same ‘alts, 
is the potassium salts to be either auibshieitive or additive compounds f, “Tiniageetae 
“Anlagerungsverbindungen”), the guaiacol compannd for instance: ——. — mk 
1c Cott [OF] [OCHsDe] oe 
washing with alcohol. a 
From alcoholic Solutions of 1 mol. Ek COOK and Z mols. eo 
