Synthesis and Crystal Structure of Anilinium Pertechnetate and Perrhenate at Low and Room Temperatures

摘要

Anilinium pertechnetate (I) and perrhenate (II) salts were synthesized for the first time and their crystal structure was studied. The crystals of the compounds are isostructural (monoclinic system, space group P2_1/c). On cooling from 293 to 100 K, both compounds undergo a phase transition with doubling of the parameter a, the isostructural character being retained and the space group remaining the same. The phase transitions are accompanied by strengthening and change in the H-bond system.