Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Structural Isomers of {MnII(L)2[AgI(CN)2]2} (L = 3-Methylpyridine or 4-Methylpyridine), Bilayer Structure with Binuclear Argentophilic Interaction and Interpenetrated Structure with 1D Chain Argentophilic Interaction; Synthesis, Crystal Structure, and Magnetic Properties
Takashi KosoneYusuke SuzukiChikahide KanadaniToshiaki SaitoTakafumi Kitazawa
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2009 Volume 82 Issue 3 Pages 347-351

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Abstract

New novel 2D network bimetallic MnIIAgI coordination compounds {MnII(L)2[AgI(CN)2]2}n (L = 3-methylpyridine (1) or 4-methylpyridine (2)) were synthesized and characterized by using single-crystal X-ray analysis and magnetic measurements. MnII ion in both complexes has MnN6 coordination with octahedral geometries, which are linked by a [AgI(CN)2] unit at the equatorial plane to form a polymeric 2D sheet architecture. The two pyridine rings coordinate at the axial positions. However, coordination polymers for 1 and 2 are structural isomers. The structure of 1 comprises a parallel 2D array and the layers interact by pairs defining bilayers with strong binuclear argentophilic interaction, while 2 comprises a double interpenetration structure with 1D-chain weak argentophilic interaction. Furthermore, intermolecular C···C contacts in these complexes are significantly smaller than the sum of the van der Waals radius. Variable-temperature (2–300 K) magnetic susceptibility measurements of both the compounds have been performed to understand the possibility of spin transition in 1 and 2. However, the susceptibility data of 1 and 2 indicate the existence of high-spin (HS) state manganese(II) throughout the temperature range.

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© 2009 The Chemical Society of Japan
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