A new restrainer test for photographic gelatins

✍ Scribed by Steigmann, A.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1942
• Weight: 308 KB
• Volume: 61
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000610407

✦ Synopsis

mcnt is not very close ; the discrepnncy is probnbly due to trnccs of the dinlcohol. Cottdetisation with p-cre.~oI.-O~ 1 g. of moiionlcohol wns dissolved in 1 -0 g. of molten p-cresol and 0.1 C.C. of snturnted nlcoliolic hydrogen chloride ntlded. After henting for linlf nil hour a t 100" the product wns precipitntetl with 10 C.C. of nqueous methyl nlcohol (66%). Wlien crystnlliscd from toluene it lint1 m.p. 210-21 1" [Blegson nnd Dru~ii~iiond~ givc m.p. 214' for compound (III)]. Themiised mp. with nn nutlientic specimen of the three-ring compound wns 210'. Cottrfc?tscilioti witk fortticik[~e~!/ftc.-To 2 -4 g. of nioiionlcohof dissolwtl in 100 c . ~. of 2% sodiufii Iiydrosidc were nddetl 10 c . ~. of 30% formnldehyde. After 14 tlnys the ~irotlirct wns prccipitnted with cnrbon diositle. \'lien crrstnllised from benzene i t lint1 m . ~. 148". Tlic niisetl n1.p. with the tiinlcoliol (11) wvs 148' nntl with tli; mononlcohol (I) 133".