Abstract
Abstract Reaction of 2, 6-(CHMe2)2 C6H3NC in 5:1 mole ratio with Co(II) produces transient Co(CNR)5X2 nH2o, × = Clo4, BF4. The perchlorate salt sponlaneously transforms into [Co (CNR) 4 (ClO4) 2] and the tetrafluoroborate salt into [Co (CNR) 6] (BF4) 2. Perchlorate-ion coordination is confirmed by analogy with [Co(CNR) 4 (Clo4)]4, R = 2, 6-Me2C6H3, 2, 6-Et2C6H3. The BF4 − salt is the first known example of a hexakis (organoisocyanide)-cobalt(II) complex to be isolated, and shows deviation from octahedral coordination in solid state.
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