✦ LIBER ✦

(o-Hydroxyphenyl)methylphosphonic acids: Synthesis and potentiometric determinations of their pKa Values

✍ Scribed by Volker Böhmer; Walter Vogt; Salah Chafaa; Jean Meullemeestre; Marie-José Schwing; François Vierling

Publisher: John Wiley and Sons
Year: 1993
Tongue: German
Weight: 696 KB
Volume: 76
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19930760108

No coin nor oath required. For personal study only.

✦ Synopsis

3. VIII.92)

(o-Hydroxypheny1)methylphosphonic acids are readily obtained from o-(bromomethy1)or o-(hydroxy-methy1)phenols and trialkyl phosphites. Subsequent hydrolysis leads to the corresponding phosphonic acids. For a series of such compounds, the pK, values have been determined by potentiometry. Their dependence on additional substituents in the aromatic ring is discussed in terms of electronic and steric effects.

📜 SIMILAR VOLUMES

(o -Hydroxyphenyl)methylphosphonic Acids

(o -Hydroxyphenyl)methylphosphonic Acids: Spectrophotometric determination of their pKa values and of the deprotonation sequence

✍ Salah Chafaa; Jean Meullemeestre; Marie-José Schwing; François Vierling; Volker 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 German ⚖ 606 KB

Microwave-Assisted Synthesis of Novel 2,

Microwave-Assisted Synthesis of Novel 2,4-Dihydro-5-[4-(trifluoromethyl)phenyl]-3H-1,2,4-triazol-3-ones and Potentiometric Determination of Their pKa in Nonaqueous Solvents

✍ Musa Özil; Fatih İslamoğlu; Emre Menteşe; Bahittin Kahveci 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 German ⚖ 231 KB

The novel 4-amino-or 4-aryl-substituted 2,4-dihydro-5-[(4-trifluoromethyl)phenyl]-3H-1,2,4-triazol-3-ones 3a -3g were synthesized by reaction of N-(ethoxycarbonyl)-4-(trifluoromethyl)benzenehydrazonic acid ethyl ester (2) and primary amines or hydrazine by microwave irradiation. Compounds 3a -3g wer