Abstract
The 2 + 2 cyclocondensation reactions of
N-(2-pyridylmethyl)-N-(2-aminoethyl)-1,2-diaminoethane (L-22py),
N-(2-pyridylmethyl)-N-(2-aminoethyl)-1,3-diaminopropane (L-23py) and
N-(2-pyridylmethyl)-N-(3-aminopropyl)-1,3-diaminopropane (L-33py) with
2,6-diformyl-4-methylphenol (dfp) in the presence of MnCl2 4H(2)O in
equimolar ratios are reported. The resulting compounds, (1), (2) and
(3), respectively, were characterized by IR spectroscopy, elemental
analysis and mass spectrometry. The X-ray crystal structure analysis of
(3) showed that it contains a novel cocrystal of a binuclear Mn(II)
macrocyclic cation and a di(binuclear) one. The Mn(II) ions in the
latter binuclear and di(binuclear) cations are five and six-coordinate
respectively. The two binuclear parts in the di(binuclear) cation are
bonded through two bridging chloride ions. The macrocyclic ligand in the
above cations also has two different conformational structures, but in
both cases it catches a proton. The analytical data show that compounds
(1) and (2) probably have similar structures to (3). (C) 2013 Elsevier
Ltd. All rights reserved.
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