phenylene
(ˈfɛnɪliːn)
[f. phenyl + ene.]
a. The hydrocarbon C6H4.
| 1866 Watts Dict. Chem. IV. 480 Phenylene. C6H4. A liquid having this composition and boiling at 91° was found by Church among the products of the distillation of phenylic chloride with sodium-amalgam. |
b. phenylene blue, a blue dye (see
indamine);
phenylene brown = Bismarck brown (
s.v. Bismarck 1),
vesuvin;
ˌphenyleneˈdiamine, any of three isomeric, toxic, crystalline solids, C
6H
4(NH
2)
2, or their alkylated derivatives, which are widely used in the dye industry, as photographic developers, and (in the case of the
para isomer) as an additive in rubber to prevent oxidation.
| 1876 Athenæum 16 Dec. 806/1 ‘Phenylene-diamine’ obtained from dinitro-benzene by the action of reducing agents. 1889 G. M'Gowan tr. Bernthsen's Text-bk. Org. Chem. 356 The simplest member of this class is the indamine ‘Phenylene Blue’, C12H11N3,..which results from the oxidation of a mixture of aniline and p-phenylenediamine. 1903 [see indamine]. 1952 K. Venkataraman Chem. Synthetic Dyes II. xxv. 762 The indamines (e.g., Phenylene Blue) are obtained by oxidizing a neutral solution of..a p-diamine.., and..a monamine (e.g. aniline) having a free p-position. |
| 1867 Chem. News 12 July 24/2 The phenylene-brown consists chiefly of a new base of the composition C12H13N5. 1885 [see Bismarck 1]. 1922 A. Clarke Coal-Tar Colours in Decorative Industries iii. 43 The colours most suitable for this method are:—On White Earth—..Phenylene Brown, Crystal Violet and Methyl Violet. |
| 1862 A. W. Hofmann in Proc. R. Soc. XI. 519 The idea very naturally suggested itself, to look to dinitrobenzol as the source from which phenylene-diamine might reasonably be expected to arise. 1918 Jrnl. Chem. Soc. CXIV. ii. 69 The authors have investigated the..binary systems formed between phenol..and the three phenylenediamines. 1972 Materials & Technol. V. xiv. 522 Only the..p-phenylene diamines and dihydroquinolines give good ozone protection [to rubber]. 1973 D. A. Spencer Focal Dict. Photogr. Technol. 440 Phenylenediamines, generic name for compounds derived from ortho-phenylenediamine and para-phenylenediamine which act as photographic developing agents. |