Phase diagrams of urea inclusion compounds 3. Pentadecanoic acid and urea

被引：1

作者：

Kuhnert-Brandstatter, M ^{[1
]}

Burger, A ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Pharmacognosy, A-6020 Innsbruck, Austria

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 1998年 / 52卷 / 02期

关键词：

binary systems; inclusion compounds; miscibility gaps of liquid phases; pentadecanoic acid; urea;

D O I：

10.1023/A:1010197523294

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The phase diagram of the pentadecanoic acid and urea system consists of a combination of a binary system with two incongruently melting compounds and a system with a miscibility gap of the liquid phases. The first compound is a molecular addition compound of 1 molecule of pentadecanoic acid and 4 molecules of urea, which forms three polymorphic modifications. The second compound is a channel inclusion compound, which is known to be in a ratio of 1:12.2. In addition to the thermoanalytical investigations, FTIR spectroscopic and X-ray diffractometric analyses were also conducted for the inclusion compound as well as the stable form of the molecular addition compound.

引用

页码：315 / 325

页数：11

共 11 条

[1]

[Anonymous], 1954, THERMOMIKROMETHODEN

[2] UBER NEUARTIGE ADDITIONSVERBINDUNGEN DES HARNSTOFFS [J].

BENGEN, F ;

SCHLENK, W .

EXPERIENTIA, 1949, 5 (05) :200-200

[3]

Deffet L., 1942, REPERTOIRE COMPOSES

[4]

KOFLER A, 1941, Z ELEKTROCHEM, V47, P810

[5]

Kuhnert-Brandstatter M., 1971, THERMOMICROSCOPY ANA

[6]

KUHNERTBRANDSTA.M, 1982, WILSON WILSONS COMPR, V16, P329

[7]

KuhnertBrandstatter M, 1996, PHARMAZIE, V51, P288

[8] Phase diagrams of urea inclusion compounds .2. Stearic acid and urea [J].

KuhnertBrandstatter, M ;

Burger, A .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 1997, 50 (04) :559-567

[9] UNUSUAL PHASE-DIAGRAMS OF THE POLYETHYLENE-GLYCOL-6000 AND POLYETHYLENE-GLYCOL-4000 WITH UREA [J].

KUHNERTBRANDSTATTER, M ;

GRIESSER, UJ .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 1995, 45 (03) :559-572

[10]

SATO K, 1991, ORGANIC CRYSTALS, V1, P65

← 1 2 →