TY - JOUR
T1 - Coordination chemistry of tetrazolate-5-carboxylate with manganese(ii)
T2 - Synthesis, structure and magnetism
AU - Jia, Qin Xiang
AU - Sun, Wei Wei
AU - Yao, Cheng Fu
AU - Wu, Hai Hong
AU - Gao, En Qing
AU - Liu, Cai Ming
PY - 2009
Y1 - 2009
N2 - Six Mn(ii) coordination compounds with tetrazolate-5-carboxylate (tzc), have been synthesized and characterized. They are of the formula [Mn 2(tzc)2(H2O)2]·4H 2O (1), Mn(tzc)(H2O)2 (2), [Mn 2(tzc)2(phen)2(H2O)2] (3), [Mn(tzc)(2,2′-bpy)(H2O)2] (4), [Mn(tzc)(4,4′-bpy)] (5) and [Mn2(tzc)2(H 2O)2]·(bpp) (6), where phen = 1,10-phenanthroline, 2,2′-bpy = 2,2′-bipyridyl, 4,4′-bpy = 4,4′-bipyridyl, and bpp = 1,3-di(4-pyridyl)propane. Versatile coordination modes of the tzc ligand have been recognized in these compounds. In the absence of auxiliary ligands, a dinuclear compound (1) with the Mn2(N-N)2 moiety and a 1D coordination polymer (2) consisting of two types of disordered Mn(tzc) chains have been obtained at different temperatures. The incorporation of chelating auxiliary ligands (2,2′-bpy and phen) leads to a mononuclear (4) and a dinuclear (3) compounds, the structure of the latter resembling that of 1. The use of the ditopic auxiliary ligand 4,4′-bpy gives a 2D coordination polymer (5) in which disordered Mn(tzc) chains are cross-linked by 4,4′-bpy. However, the potentially ditopic ligand bpp is not involved in coordination but serves as hydrogen-bonded bridge between the Mn(tzc) chains to give compound 6. Magnetic investigations suggest that the double N-N bridges in the dinuclear compounds (1 and 3) mediate weak ferromagnetic coupling. However, in compounds 2, 5 and 6, which consist of 1D disordered Mn(tzc) chains with different bridging moieties, the intra-chain interactions are dominated by antiferromagnetic coupling.
AB - Six Mn(ii) coordination compounds with tetrazolate-5-carboxylate (tzc), have been synthesized and characterized. They are of the formula [Mn 2(tzc)2(H2O)2]·4H 2O (1), Mn(tzc)(H2O)2 (2), [Mn 2(tzc)2(phen)2(H2O)2] (3), [Mn(tzc)(2,2′-bpy)(H2O)2] (4), [Mn(tzc)(4,4′-bpy)] (5) and [Mn2(tzc)2(H 2O)2]·(bpp) (6), where phen = 1,10-phenanthroline, 2,2′-bpy = 2,2′-bipyridyl, 4,4′-bpy = 4,4′-bipyridyl, and bpp = 1,3-di(4-pyridyl)propane. Versatile coordination modes of the tzc ligand have been recognized in these compounds. In the absence of auxiliary ligands, a dinuclear compound (1) with the Mn2(N-N)2 moiety and a 1D coordination polymer (2) consisting of two types of disordered Mn(tzc) chains have been obtained at different temperatures. The incorporation of chelating auxiliary ligands (2,2′-bpy and phen) leads to a mononuclear (4) and a dinuclear (3) compounds, the structure of the latter resembling that of 1. The use of the ditopic auxiliary ligand 4,4′-bpy gives a 2D coordination polymer (5) in which disordered Mn(tzc) chains are cross-linked by 4,4′-bpy. However, the potentially ditopic ligand bpp is not involved in coordination but serves as hydrogen-bonded bridge between the Mn(tzc) chains to give compound 6. Magnetic investigations suggest that the double N-N bridges in the dinuclear compounds (1 and 3) mediate weak ferromagnetic coupling. However, in compounds 2, 5 and 6, which consist of 1D disordered Mn(tzc) chains with different bridging moieties, the intra-chain interactions are dominated by antiferromagnetic coupling.
UR - https://www.scopus.com/pages/publications/63549113584
U2 - 10.1039/b818915c
DO - 10.1039/b818915c
M3 - 文章
AN - SCOPUS:63549113584
SN - 1477-9226
SP - 2721
EP - 2730
JO - Dalton Transactions
JF - Dalton Transactions
IS - 15
ER -