| abstract |
According to the invention the use of a spin crossover complex with the general formula [M x+ (L y )H]AN) z nwhere nM is a positively charged metal ion, nL is a heteroaromatic ligand containing at least one nitrogen atom in the ring system, nAN is a negatively charged inorganic anion, nx means two or three, ny means two or three, and nz means two, three or four nis proposed as a contrast agent in magnetic resonance imaging of human or animal bodies. |