numbers 2 bad 3 are hecessary- 2, 3 che 2 tue receive, on the 
plane C—D, the additional index «, on the other side the index 8.7 Ino 
the further difference with regard to the plane A—B, the atoms 3a and 38 on 
one side of A—B receive an additional sign of a hyphen (3a’, 8), whereas those 
the other side remain unaltered. When two substituting groups are attached to : 
same carbon atom, it is sufficient to repeat the index. Hence, camphane would be. 
termed: p-mesomethylene- [1,1,2-trimethyl-]eyclohexane, and camphor: ‘pemesomethylene- 
[1,1 ,2u-trimethyl- lcjclotiexan[one Sale ie Ryan . 
HeC oe CH, H.C CH ‘Ga 
C(CHios i C(CH., 
H,C—--—C CHa: HC C 
Camphane. Camphor. 
These examples will probably be sufficient to illustrate the nomenclature worke 
out by Bredt and Savelsberg; the denominations for other bodies of interest for us, 
such as fenchane, isofenchane, fenchone, isofenchone, dimethylcamphor, bornylene, 
camphene, pinene, pinocamphone, tricyclene carboxylic acid, teresantalic acid, &c 
may be followed up with aid of the formulz and explanations of the original sala 
In his paper, “On the condensation of exclusively open-chain- unsaturated systems’ Ff 
H. J. Prins’) mentions, inter alia, the formation of ionone from pseudoionone. Ros, o 
In connection with his theoretical considerations, he reports on the formation of 
symm. phenylpropy! glycol from styrene and formaldehyde, with addition of water, 
where secondarily some polystyrene is formed. Phenylpropyl glycol is a colourless 
oil, b. p. 145° (12 mm.); boiling with acetic anhydride transforms it quantitatively into 
the diacetate, b.p. 178° (12 mm). The glycol has a decided smell which muse ie 
ascribed to the phenyl radical. 
Since the work is mainly theoretical and not fit for a short epitome, we mus 
content ourselves with the above cxaeks 
On allyl compounds. —In their first communication on unsaturated radicals and 
their chemical and pharmacological behaviour, J. von Braun and Z. Kohler?) poin 
out the fact that amongst the aliphatic radicals the unsaturated allyl group takes 
position quite for itself. Such manifests itself, inter alia, in the loose linking w 
nitrogen’ and in some other reactions, for instance in the transformation of the O-a 
phenyl ethers, at elevated temperature, with migration of the allyl group toa carbe 
atom of the benzene nucleus, a fact which must be explained by the low degree of 
attachment of the allyl radical to oxygen 3), The transposition of allyl rhodanide_ t 
allyl. or cinnamyl tadical. They started from cinnamyl ateaiaaie which was ivan me C 
wid cinnamyl bromide, into cinnamyl Coe one Both of these bodie 
1) Chem. Weekblad 14 (1917), 923; Chem. Zentralbl. 1918, I. 168. — ?) Berichte 51 (918), 7, 
L. Claisen and O. Eisleb, Liebig’s Ann? 401 (1913), ate Hepert Spat 1914, tee <p gs 
