Generation and Direct Observation of the Xanthenide Anion; a Stable 4 n  π‐System | Zendy

Anastassiou A. G. | Zendy; Kasmai H. S. | Zendy

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Generation and Direct Observation of the Xanthenide Anion; a Stable 4 n π‐System

Author(s) -

Anastassiou A. G.,

Kasmai H. S.

Publication year - 1980

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.198000431

Subject(s) - antiaromaticity , ion , xanthene , chemistry , ring (chemistry) , paramagnetism , liquid ammonia , ring current , crystallography , ammonia , computational chemistry , stereochemistry , photochemistry , organic chemistry , molecule , physics , condensed matter physics , plasma , aromaticity , magnetosphere , quantum mechanics

The stable anion (1) can be regarded as an antiaromatic species; it is generated from xanthene with KNH 2 in liquid ammonia. Skeletal rearrangements with ring contraction occurring in non‐annelated heterocycles do not take place. The 1 H‐NMR spectrum of (1) is indicative of a paramagnetic ring current.

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