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Calixarene‐Based Macrocyclic Nonet ( S = 4) Octaradical and its Acyclic Sextet ( S = 5/2) Pentaradical Analogue
Author(s) -
Rajca Andrzej,
Rajca Suchada,
Padmakumar Raghavakaimal
Publication year - 1994
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.199420911
Subject(s) - magnetization , ground state , coupling (piping) , spin (aerodynamics) , molecule , calixarene , state (computer science) , chemistry , materials science , stereochemistry , crystallography , physics , organic chemistry , thermodynamics , quantum mechanics , mathematics , algorithm , magnetic field , metallurgy
Magnetization and ESR spectroscopic data indicate a high‐spin ground state ( S = 4) for 1 in frozen solution. A related acyclic pentaradical also has a high‐spin ground state ( S = 5/2). These compounds may be the first step towards understanding the impact of defects on spin coupling in multi‐site molecules.