A cyclic compound of the general formula (I)
where X-Y-Z is N═C—O, NH—C═N or N═C—NH and
R
1
, R
2
and R
3
are each H or C
1-6
-alkyl
and of the general formula (III)
where X-Y-Z is N═C—O and
R
1
, R
2
and R
3
are each H or C
1-6
-alkyl, may be used as complexing ligands.
通式为(I)的环状化合物,其中X-Y-Z为N═C—O、NH—C═N或N═C—NH,且R1、R2和R3均为H或C1-6-烷基;以及通式为(III)的化合物,其中X-Y-Z为N═C—O,且R1、R2和R3均为H或C1-6-烷基,可以用作配位
配体。