Premium
Synthesis and Molecular Structures of Cu II 15‐Metallacrown‐5 Complexes with Encapsulated Ca II , Pr III and Nd III Ions
Author(s) -
Safyanova Inna S.,
Golenya Irina A.,
Pavlenko Vadim A.,
GumiennaKontecka Elzbieta,
Pekhnyo Vasily I.,
Bon Volodymyr V.,
Fritsky Igor O.
Publication year - 2015
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.201500255
Subject(s) - ionic radius , crystallography , chemistry , crystal structure , metal , ion , ionic bonding , inorganic chemistry , organic chemistry
Three complexes [Ca(ClO 4 )(H 2 O)Cu 5 (o‐picHA‐2H) 5 (H 2 O)]ClO 4 ( 1 ), [Pr(NO 3 ) 2 (py)Cu 5 (o‐picHA‐2H) 5 (py) 5 ]ClO 4 ( 2 ), and [Nd(NO 3 )(H 2 O)(py)Cu 5 (o‐picHA‐2H) 5 (py) 5 ](ClO 4 ) 2 · 5py ( 3 ) ( o ‐picHA = 2‐picolinehydroxamic acid) were synthesized in order to retrace structural trends caused by the change of the ionic radius of the central metal ion as well as to assess the effect of the axial ligands on the arrangement of metallacrowns. The complexes were characterized by elemental analysis, ESI‐mass spectrometry, IR spectroscopy, and single‐crystal X‐ray analysis. The heterometallic complexes have 15‐MC‐5 molecular topology with Ca II or Ln III ion in the center of the metallamacrocyclic cavity. The Ca–O and Ln –O bond lengths follow the trend of changes of the corresponding metal ionic radii. While the Ca II complex cation (without axial ligands) in 1 is almost flat, the Ln III containing cations in 2 and 3 have a “partially opened umbrella“ environment.