Key points are not available for this paper at this time.
Pseudochalcogens, their derivation, characterisation and reactivity will be discussed in this review. The pseudochalcogen concept has its origin in the first work on isosterism (Langmuir, 1919), in the cyanogen displacement principle (Madelung and Kern, 1922), the hydride displacement principle (Grimm, 1925) and the pseudohalogen concept (Birckenbach and Kellermann, 1925). In addition, the pseudochalcogen concept is closely connected with other modern pseudoelement models and integratable in more general ones, like the element displacement principle (Haas, 1982) and the isolobal concept (Hoffmann, 1982).
Jäger et al. (1992) studied this question.