Synthesis, crystal structures and magnetic properties of a new radical NIT-1′-MeBzIm and the corresponding complexes of Ni(II), Co(II) and Zn(II) containing NIT-1′-MeBzIm was written by Wang, Li-Ya;Sun, Xiao-Yuan;Yang, Rui-Hua;Jiang, Kai;Wang, Yu-Fang. And the article was included in Journal of Molecular Structure in 2010.SDS of cas: 3012-80-4 This article mentions the following:
A new chelating radical, ligand NIT-1′-MeBzIm (1, NIT-1′-MeBzIm = 2-(1-methylbenzimidazol-2-yl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) and three corresponding complexes, [M(NIT-1′-MeBzIm)2(NO3)(CH3OH)]·(NO3)(CH3OH) (M = Ni (2), Co (3)) and [Zn(NIT-1′-MeBzIm)2(CH3OH)2]·(ClO4)2(H2O)2(CH3OH) (4), were prepared and structurally characterized by x-ray diffraction and variable-temperature magnetic susceptibility measurements. In the crystal structures radical 1 and complexes 3 and 4 crystallize isomorphously in monoclinic, with the space groups P2(1)/n, P2(1)/c, and P2(1), resp. Complex 2 crystallizes in orthorhombic space group Pna2(1). The metal ions of the three complexes embed in distorted octahedral geometry centers and are coordinated by two NIT-1′-MeBzIm radicals from the equatorial positions to form trans configurations; the axial positions are occupied by one methanol mol. and one nitrate anion for 2 and 3, but by two methanol mols. for 4. Magnetic measurement demonstrates that the intramol. exchange couplings in 2 and 3 are antiferromagnetic with J = -41.25 and -38.1 cm-1, where the spin Hamiltonian is defined as H^= -2J(Sr̂ad1 SM̂ + SM̂ Sr̂ad2) based on the mol. structure of radical-metal-radical, while that in 4 is weakly ferromagnetic with J = 1.65 cm-1 where the spin Hamiltonian is defined as H^= -2JS1̂S2̂ within the complexes. Intermol. exchange couplings in 1 is also weakly ferromagnetic with J = 1.32 cm-1 where the spin Hamiltonian is defined as H^= -2JS1̂S2̂ between radical and radical. Compounds 2–4 exhibit intermol. antiferromagnetic interactions with the zJ’ = -0.52 cm-1, θ = -0.75 K and zJ’ = -0.49 cm-1 for compounds 2, 3 and 4, resp., which should ascribe to the weak interactions. The crystal structures for 1–4 have intermol. hydrogen bonding interactions (and π-π piling interactions for 1 and 3) which form the single crystals into 1-dimensional, 2-dimensional and 3-dimensional structures and seems to play an important role in mol. packing and in magnetic coupling. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde (cas: 3012-80-4SDS of cas: 3012-80-4).
1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde (cas: 3012-80-4) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole derivatives have antibacterial, antifungal and anticancer functionality. It interacts with DNA and also binds to protein and stops cell division.SDS of cas: 3012-80-4
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem