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Issue 2, 2008
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Silver(i) complexes with oxazoline-containing tripodal ligands: structure variation via counter anions and reaction conditions

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Abstract

Seven new silver(I) complexes of the formula [Ag2(L)2(CF3SO3)2] (1), [Ag2(L)2(CH3SO3)2] (2) [Ag2(L)2](BF4)2 (3), [Ag3(L)2(NO3)2]NO3·5H2O (4), [Ag2(L)(NO3)2]·CH3OH (5), [Ag2(L)2](ClO4)2 (6) and [Ag3(L)2(CH3CN)3](ClO4)3 (7) have been synthesized by reactions of 1,3,5-tris(2-oxazolinyl)benzene (L) with varied silver(I) salts under different conditions. The influences of counter anions and reaction conditions on the structure of the complexes are discussed. Three complexes 1, 2 and 3 with two kinds of different 1D chain structures were obtained under the same synthetic conditions by using different silver(I) salts, and the ligand L was found to adopt bis-monodentate (1 and 2) and tris-monodentate (3) coordination modes respectively. On the other hand, by using the same silver(I) nitrate or silver(I) perchlorate but different reaction solvents, 4 and 5 or 6 and 7 were isolated respectively. Complexes 4 and 5 have different 1D chain structures, and 6 is isostructural with 3. However, 7 is a tri-nuclear, propeller-shaped M3L2 supramolecular capsule in which L adopts a cis,cis,cis-conformation, while the ligand L in 36 has cis,trans,trans-conformation. The results revealed that the nature of the counter anions, such as their size, coordination ability and coordination mode, and the reaction conditions all have great impact on the structure of the complexes. The complexes were also characterized by electrospray mass spectrometry. Furthermore, complex 7 exhibited modest second-harmonic-generation (SHG) efficiency.

Graphical abstract: Silver(i) complexes with oxazoline-containing tripodal ligands: structure variation via counter anions and reaction conditions

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Supplementary files

Article information


Submitted
19 Sep 2007
Accepted
06 Nov 2007
First published
04 Dec 2007

Dalton Trans., 2008, 204-213
Article type
Paper

Silver(I) complexes with oxazoline-containing tripodal ligands: structure variation via counter anions and reaction conditions

Y. Huang, Z. Shen, T. Okamura, Y. Wang, X. Wang, W. Sun, J. Yu and N. Ueyama, Dalton Trans., 2008, 204
DOI: 10.1039/B714502K

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