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Two new azido-CoIIcomplexes with pyrazine carboxylato ligands, [Co(N3)(L)·H2O]n(L= pyrazine-2-carboxylato) (1) and [CoNa(N3)2(L)]n(2), have been obtained by carefully tuning the CoII : N3−ratio. Here we present the structural and magnetic characterization of these new species. Modulation of the coordination environment of CoIIleads to a variation of the magnetic properties of the obtained compounds. Complex 1exhibits ferromagnetically coupled [Co2] units that form the rungs of the ladder with a nearly negligible coupling between these units, while complex 2is a 2D arrangement of 1D CoIIsingle-chain magnets. [ABSTRACT FROM AUTHOR]

A new 3D porous NiII-azido complex has been synthesized and characterized and exhibits guest sorption properties explored by single-crystal to single-crystal transformations and linear ferromagnetic chains held together by a Ni–isonicotinate framework. [ABSTRACT FROM AUTHOR]

Four novel AgI coordination complexes with azole heterocycle ligands bearing acetic acid group, [AgL1]n (1), [Ag(L2HL2)]n (2), [AgL3]n (3) and [Ag(L4)]n (4) (here, HL1 = 1H-imidazole-1-acetic acid, HL2 = 1H-benzimidazole-1-acetic acid, HL3 = 1H-1,2,4-triazole-1-acetic acid, HL4 = 1H-benzotriazole-1-acetic acid), have been synthesized and structurally characterized by elemental analysis, IR and X-ray diffraction. Structural analyses show that complex 1 possesses a two-dimensional structure, which contains silver chains formed by weak Ag–Ag interactions, and 2 consists of neutral chains connected by weak bonds (O⋯H⋯O), while 3 and 4 have a three-dimensional network and a one-dimensional chain structure, respectively. It is interesting that in 1 there exist Ag–Ag interactions with a separation of 3.156 Å, which play an important role in the formation of the complex. Furthermore, the conductivity of 1 was studied in the powder state. [ABSTRACT FROM AUTHOR]

Three new 1D lanthanide-azido complexes, [Ln2(N3)(isonic)2- (OH)3(Hisonic)(H2O)]n (Ln = GdIII, EuIII and SmIII), were synthesized by hydrothermal reaction and their magnetic properties were studied. [ABSTRACT FROM AUTHOR]