Synthesis and crystal structure of silver and argentate complexes of mixed halocarborane anions, (C5H5N)2Ag(1‐HCB11Br5I6)(C5H5N) and [{(CH3CN)4Ag3}{Ag(CB11I5Br6)2}]n

The first argentate salt of carborane anion, [{(CH3CN)4Ag3}{Ag(CB11I5Br6)2}]n, was prepared from K2[CB11I5Br6] and AgNO3 followed by recrystallization from acetonitrile. Single‐crystal X‐ray analyses indicate that the CB11I5Br62− dianion has a significantly different coordination motif from that of the CB11Br5I6− monoanion. This result suggests that the polarity of the CB11 cage can be changed after deprotonation of the cage CH proton.