Patent ID: 7208140

Claim:
A metal complex of formula I in which Hal stands for bromine or iodine, A 1 stands for —CONR 1 —(CH 2 ) n —NR 2 —(CO—CHZ 1 -NH) m —CO—CHZ 2 -*, —CONR 1 —(CH 2 ) p —(CONR 2 CH 2 ) m —CHOH—CH 2 —*, —CH 2 O—(CH 2 ) p —CHOH—CH 2 —*, —CH 2 —O—(CH 2 ) n —NR 1 —(CO—CHZ 1 -NH) m —CO—CHZ 2 -*, or —CH 2 —NR 1 —CO—(CHZ 1 -NH—CO) m —CHZ 2 -*, A 2 independently has the same meaning as A 1 or in the case that A 1 has the meaning first mentioned above can also stand for the radical-NR 1 —CO—(NR 1 ) m —(CH 2 ) p —NR 2 —(CO—CHZ 1 -NH) m —CO—CHZ 2 -*, * designates the binding site to K, R 1 and R 2 mean, independently of one another, a hydrogen atom, C 1 –C 2 -alkyl group or a monohydroxy-C 1 –C 2 -alkyl group, Z 1 and Z 2 mean, independently of one another, a hydrogen atom or a methyl group, n means the number 2–4, m means the number 0 or 1 and p means the number 1–4, K stands for a macrocyclic compound of formula I a with X meaning a hydrogen atom or a metal ion equivalent of atomic numbers 20–29, 39, 42, 44 or 57–83, provided that at least two X stand for metal ion equivalents, and optionally present free carboxy groups optionally are present as salts of organic and/or inorganic bases or amino acids or amino acid amides.