Complexes of 4-aminoantipyrine with lanthanide thiocyanates

Complexes of lanthanide thiocyanates with 4-amino antipyrine have been synthesized for the first time. Unlike other lanthanide complexes, these complexes are quite novel in that the lanthanide ions themselves fall into two groups (the lighter ones and the heavier ones) as regards their coordinating ability. The complexes have been characterized using various physico-chemical techniques such as conductivity measurements, infrared spectroscopy, and thermal analysis (TG, DTG and DTA). (author)