Calixarene and oxacalixarene derivatives and use thereof of sequestration metals

Calixarene and oxacalixarene derivatives of the formula IV;

• ##STR28## wherein (m'+m")=0-8;
• n=0-8;
• m'.gtoreq.1/2(m'+m");
• and .ltoreq. (m'+m"+n).ltoreq.8;
• if n=0, then (m'+m").gtoreq.4;
• provided that m' and n cannot equal zero at the same time;
• R.sup.3 is H, halogen, or a C.sub.1 -C.sub.10 hydrocarbyl or C.sub.6 -C.sub.20 aryl hydrocarbylaryl group, any of which may be substituted by one or more halo or oxo groups or interrupted by one or more oxo groups, and R.sup.3 may be the same or different on each aryl group;
• R.sup.15 is H or a C.sub.1 -C.sub.10 hydrocarbyl or C.sub.6 -C.sub.20 aryl or hydrocarbylaryl group, any of which may be substituted by one or more halo or oxo groups or interrupted by one or more oxo groups;
• and
• X is selected from the group consisting of ##STR29## wherein R.sup.7 and R.sup.8, which may be the same or different, are H or a C.sub.1 -C.sub.10 hydrocarbyl, including a cycloaliphatic ring formed by R.sup.7 and R.sup.8 together, or C.sub.6 -C.sub.20 aryl or hydrocarbylaryl group, any of which may be substituted by one or more halo or oxo groups or interrupted by one or more oxo groups;
• R.sup.9 is --OH, --NH.sub.2, --NHC(O)NH.sub.2 or --NHAr, wherein Ar is a C.sub.6 -C.sub.20 aryl group which may be substituted with one or more halo or oxo groups or interrupted by one or more oxo groups;
• Y is a cycloaliphatic ring;
• and n' is 0 or 1.