Mimmi, Maria Chiara published the artcileSynthesis and conformational studies of a chiral octadentate ligand derived from (R)-1,1′-binaphthyl-2,2′-diamine and its dinuclear zinc(II) and nickel(II) complexes, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, the publication is European Journal of Inorganic Chemistry (2003), 3934-3944, database is CAplus.
The synthesis of the octadentate ligand (R)-(-)-N,N’-dimethyl-N,N’-bis{3-[bis(1-methyl-2-benzimidazolylmethyl)]-aminopropyl}-1,1′-binaphthyl-2,2′-diamine (L), containing a central 1,1′-binaphthalenediamine core connected to two aminobis(benzimidazole) arms by flexible trimethylene C chains, and its dinuclear complexes [Zn2L](ClO4)4 and [Ni2L](ClO4)4 is reported. The structural features of the free ligand and the metal complexes were studied by NMR, UV/Visible, CD, and computational methods, including simulated annealing-mol. mechanics and semiempirical PM3 calculations The preferred conformation of the free ligand was characterized by a relatively small dihedral angle of ∼75° between the two naphthyl rings, which is imposed by favorable stacking interactions between benzimidazole rings from different arms. In the dinuclear Zn(II) complex each metal ion is pseudotetrahedral and bound to three N donors of one aminobis(benzimidazole) arm and one N donor of the binaphthalenediamine residue. Coordination of the benzimidazole groups to the metal ions prevents the stacking interactions seen in the free ligand and, consequently, the dihedral angle between the naphthyl groups increases to the more usual ∼90°. In the dinuclear Ni(II) complex, the ligand still provides four N donors to each metal centers, but the stereochem. preference of the Ni(II) ions imposes a ligand field of tetragonal symmetry, with pseudo-octahedral metal centers, and this occurs with pronounced flattening of the dihedral angle between the naphthyl groups. The change in conformation, from L to [Zn2L]4+ to [Ni2L]4+, of the critical 1,1′-binaphthalenediamine residue is clearly indicated by CD spectra.
European Journal of Inorganic Chemistry published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Recommanded Product: 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem