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Valence Tautomerism of the Heptaheteronortricycles [P 7 − x As x ] 3−
Author(s) -
Hönle Wolfgang,
von Schnering HansGeorg
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198603521
Subject(s) - valence (chemistry) , tautomer , ethylenediamine , chemistry , crystallography , charge exchange , nuclear magnetic resonance spectroscopy , spectroscopy , stereochemistry , inorganic chemistry , physics , ion , quantum mechanics , organic chemistry
Solutions of the mixed crystals Rb 3 [P 7−x As x ] in ethylenediamine contain almost the entire series of the heptaheteronortricycle anions P 7−x As x , as has been demonstrated by 31 P‐NMR spectroscopy; only [PAs 6 ] 3‐ could not be detected with certainty. [P 6 As] 3− and [P 5 As 2 ] 3− are preferentially formed, but not [P 4 As 3 ] 3− as would be expected on the basis of the concept of topological charge stabilization. Very suprisingly, exchange reactions do not take place.