The determination of complex stabilities with nearly insoluble host molecules. Complexation of some transition and heavy metal cations with dibenzo-18-crown-6 in aqueous solution

被引：8

作者：

Buschmann, HJ ^{[1
]}

Cleve, E ^{[1
]}

Schollmeyer, E ^{[1
]}

机构：

[1] Deutsch Text Forschungszentrum NW EV, D-47798 Krefeld, Germany

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 1998年 / 1卷 / 08期

关键词：

stability constants; metal complexes; crown ether complexes;

D O I：

10.1016/S1387-7003(98)00078-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex formation between dibenzo-18-crown-6 and Pb2+, Tl+, Ag+, Co2+, Ni2+ and Cu2+ was studied by a new spectrophotometric method in aqueous solution. Due to complex formation the concentration of the ligand increases in solution. This can be detected spectrophotometrically. From the increases in solubility of dibenzo-18-crown-6 in the presence of salts, the stability constants of the complexes formed can be calculated. If the cation and/or the anion have an absorptivity at the same wavelength as the ligand, solutions with an identical concentration of the salt have to be used as reference. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：292 / 294

页数：3

共 15 条

[1]

[Anonymous], COORDINATION CHEM MA

[2]

BECK MT, 1970, CHEM COMPLEX EQUILIB

[3]

Buschmann HJ, 1998, AN QUIM-INT, V94, P5

[4] DETERMINATION OF COMPLEX STABILITIES WITH NEARLY INSOLUBLE HOST MOLECULES .1. SPECTROPHOTOMETRIC DETECTION [J].

BUSCHMANN, HJ ;

CLEVE, E ;

DENTER, U ;

SCHOLLMEYER, E .

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 1994, 7 (09) :479-484

[5]

Buschmann HJ, 1997, J PHYS ORG CHEM, V10, P781, DOI 10.1002/(SICI)1099-1395(199710)10:10<781::AID-POC939>3.0.CO

[6]

2-M

[7]

BUSCHMANN HJ, IN PRESS REV ROUM CH

[8] TRANSFER ACTIVITY-COEFFICIENTS BETWEEN WATER AND METHANOL OF COMPLEXES OF SOME UNIVALENT AND BARIUM IONS WITH DIBENZOCRYPTAND 2.2.2, CRYPTAND 2.2.2, AND 18-CROWN-6 [J].

CHANTOONI, MK ;

KOLTHOFF, IM .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-PHYSICAL SCIENCES, 1981, 78 (12) :7245-7247

[9]

Connors K. A, 1987, BINDING CONSTANTS ME

[10]

Hartley F. R., 1980, SOLUTION EQUILIBRIA

← 1 2 →