COMPLEXES OF ALUMINUM(III) WITH PICOLINIC AND PIPECOLINIC ACIDS - AN AL-27-NMR INVESTIGATION

被引：9

作者：

FENG, TL

TSANGARIS, JM

BARRON, AR

机构：

[1] Department of Chemistry, Harvard University, Cambridge, 02138, MA

来源：

MONATSHEFTE FUR CHEMIE | 1990年 / 121卷 / 2-3期

关键词：

!sup]27[!/sup]Al-NMR; Aluminium; Picolinic acid; Pipecolinic acid;

D O I：

10.1007/BF00809523

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aluminium-27 NMR has been employed for the study of the interaction of Al(III) with picolinic (pic-H) and pipecolinic (pip-H) acids in aqueous solution at variable pH. In the reaction with picolinic acid distinct peaks for hydrated Al(III), 1:1 and 1:2 Al-picolinate complexes, as well as a mixed hydroxo-picolinato complex Al(pic)2OH are observed. An insoluble 1:3 picolinate complex is formed at pH 3. Pipecolinic acid forms 1:1 and 1:2 Al-pipecolinate complexes. No hydroxy-pipecolinate species are formed, however, and the 1:2 complex is deprotonated above pH 4.5 to colin- (pic-H) und Pipecolinsäure (pip-H) in wäßriger Lösung bei verschiedenen pH angewandt. Bei Al(pip)(H-1pip) have been isolated and characterized by elemental analysis, IR and1H-NMR. © 1990 Springer-Verlag.

引用

页码：113 / 118

页数：6

共 21 条

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