Acid dissociation constants of anilinium and mono-nitro anilinium ions in formamide

✍ Scribed by Kanchan Acharya; Bimbadhar Nayak

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 485 KB
• Volume: 28
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(83)80006-1

✦ Synopsis

The acid dissociation constant of anilinium ion and those ofo-, m-and p-nitro anilinium ions have been determined accurately in formamide over the temperature range lO-50°C (283.15-323.15 K) from the measurement of the emf of the cells, Pt, H,/B(m,), BHCl(m,)/AgCI-Ag. The dissocianon constants at 25'C (298.15 K) have been checked by determining the same with the help of the cells, Pt, Q QHz/B(m,), BHCl(m,)/AgCl-Ag.

Thcrmodynamtcal changes AGO, AH' and AY'for the dissociation processes have been evaluated. The results show that the drssociation constants of these conjugate acids are in general lower (pK,'s higher) in formamide than their correspondrag values in water.