SYNTHESIS, CRYSTAL-STRUCTURE, AND POTENTIOMETRY OF PRIDINE-CONTAINING TETRAAZA MACROCYCLIC LIGANDS WITH ACETATE PENDANT ARMS

被引：75

作者：

KIM, WD

HRNCIR, DC

KIEFER, GE

SHERRY, AD

机构：

[1] UNIV TEXAS,DEPT CHEM,RICHARDSON,TX 75083

[2] DOW CHEM CO USA,DESIGNED CHEM R & D,FREEPORT,TX 77541

来源：

INORGANIC CHEMISTRY | 1995年 / 34卷 / 08期

关键词：

D O I：

10.1021/ic00112a040

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Tetraazamacrocycles containing the pyridine moiety as part of the cyclic backbone and acetate pendant arms were prepared. The resulting products were characterized by high resolution NMR (H-1 and C-13) spectroscopy and single-crystal X-ray diffraction. Single-crystal X-ray diffraction data were obtained for the following compounds: py[12]aneN4 . HCl, C11H19N4Cl, orthorhombic Pnma (No. 62), a = 10.304(6) Angstrom, b = 9,160(2) Angstrom, c = 13.552(2) degrees, Z = 4, Mo K alpha, lambda = 0.710 69, R = 0.037, R(w) = 0.036; and BP2A . 2HCl . 3H(2)O, C18H22NO4Cl(2) . 3H(2)O, triclinic P (1) over bar (No. 2), a = 10.201(0) Angstrom, b = 13.267(3) Angstrom, c 8.612(6) alpha = 97.676(2)degrees, beta = 105.821(0)degrees, lambda = 86.363(7)degrees, Z = 2, Mo K alpha, lambda = 0.710 69, R = 0.039, R(w) = 0.038. In addition, protonation constants (log KHnL) and metal ion stability constants (log K-ML) for BP2A (log K-H1-4L = 9.57, 5.99, 2.59, 2.22; log K-MgL = 8.9; log K-CaL = 10 0; log K-GdL = 14.5) and PC2A (log K-H1-5L = 12.5, 5.75, 3.28, 2.38, similar to 1; log K-MgL = 8.4, log K-CaL = 10.0, log K-GdL = 16.6) were determined using potentiometric and NMR pH titrations. These values agree well with previously reported literature values for analogous ligand systems.

引用

页码：2225 / 2232

页数：8

共 39 条

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