摘要:
Reaction of anhydrous FeCl2 with 6,6'-dimethyl-2,2'-bipyridyl (dmby) in non-aqueous media gives the yellow, high spin, tetrahedral complex FeCl2(dmby), which is characterized crystallographically, magnetically and by H-1 NMR spectroscopy. In contrast, reaction of FeCl2 . 4H(2)O with dmby in 0.1 M hydrochloric acid, the method of choice for preparing 3:1 and 2:1 iron(II) complexes of 2,2'-bipyridyl, gives [H(2)dmby][FeCl4] and [Hdmby][FeCl4], in which the dmby has been protonated. These complexes are also characterized crystallographically. (C) 2004 Elsevier B.V. All rights reserved.