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New 2p‐3d‐4f Chain Compounds [ Ln Zn(hfac) 5 (NIT‐Pyrim) 2 ] constructed from Pyrimidine based Nitronyl Nitroxides
Author(s) -
Xie Jing,
Li Cun,
Sun Guifang,
Yang Meng,
Li LiCun
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800212
Subject(s) - pyrimidine , chemistry , ion , crystallography , ferromagnetism , nitrogen , chain (unit) , stereochemistry , physics , organic chemistry , condensed matter physics , astronomy
The 1:1:2 mixture of Ln (hfac) 3 , Zn(hfac) 2 , and NIT‐Pyrim (hfac = hexafluoroacetylacetonate, NIT‐Pyrim = 2‐pyrimidine‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide) afforded a series of 2p‐3d‐4f magnetic chains [ Ln (hfac) 3 Zn(hfac) 2 (NIT‐Pyrim) 2 ] [ Ln III = Gd ( 1 ), Ho ( 2 ), Yb ( 3 )], in which Zn(hfac) 2 and Ln (hfac) 3 units are bridged by pyrimidine substituted nitronyl nitroxides through their NO moieties and pyrimidine nitrogen atoms. These complexes represent the first examples of 2p‐3d‐4f complexes with Zn II ions. Magnetic studies show that there exist ferromagnetic exchange couplings between the coordinated NO groups of radical ligands and the Gd III ions.