Developing the {M(CO)3}+ Core for Fluorescence Applications: Rhenium Tricarbonyl Core Complexes with Benzimidazole, Quinoline, and Tryptophan Derivatives was written by Wei, Lihui;Babich, John W.;Ouellette, Wayne;Zubieta, Jon. And the article was included in Inorganic Chemistry in 2006.Name: 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde This article mentions the following:
Tridentate ligands derived from benzimidazole, quinoline, and tryptophan were synthesized, and their reactions with [NEt4]2[Re(CO)3Br3] were studied. [Re(CO)3L]Br (L = L1, L2, L3, L4, L6, L7) (1–4, 6 and 7) exhibit fac-{Re(CO)3N3} coordination geometry in the cationic mol. units, while [Re(CO)3L]Br (L = L5) (5) exhibits fac-{Re(CO)3N2O} coordination for the neutral mol. unit, where N3 and N2O refer to the ligand donor groups. The ligands bis(1-methyl-1H-benzoimidazol-2-ylmethyl)amine (L1), [bis(1-methyl-1H-benzoimidazol-2-ylmethyl)amino]acetic acid Et ester (L2), [bis(1-methyl-1H-benzoimidazol-2-ylmethyl)amino]acetic acid Me ester (L3), [bis(quinolin-2-ylmethyl)amino]acetic acid Me ester (L4), 3-(1-methyl-1H-indol-3-yl)-2-[(pyridin-2-ylmethyl)amino]propionic acid (L5), 2-[bis(pyridin-2-ylmethyl)amino]-3-(1-methyl-1H-indol-3-yl)propionic acid (L6), and 2-[bis(quinolin-2-ylmethyl)amino]-3-(1-methyl-1H-indol-3-yl)propionic acid (L7) were obtained in good yields and characterized by elemental anal., 1-dimensional and 2-dimensional NMR, and high-resolution mass spectrometry (HRMS). The Re complexes were obtained in 70-85% yields and characterized by elemental anal., 1-dimensional and 2-dimensional NMR, HRMS, IR, UV, and luminescence spectroscopy, as well as x-ray crystallog. for [Re(CO)3(L1)]Br (1), {[Re(CO)3(L2)]Br}2·NEt4Br·8.5H2O (32·NEt4Br·8.5H2O), [Re(CO)3(L4)]Br (4), and [Re(CO)3(L6)]Br (6). Crystal data for C21H19BrN5O3Re (1): monoclinic, space group P21/c, a 13.1851(5), b 16.1292(7), c 10.2689(4) Å, β 99.353(1)°, Z = 4. Crystal data for C56H73Br3N11O18.50Re2 (32·NEt4Br·8.5H2O): monoclinic, space group C2/c, a 34.7760(19), b 21.1711(12), c 20.3376(11) Å, β 115.944(1)°, Z = 8. Crystal data for C26H21BrN3O5Re (4): monoclinic, space group P21/c, a 16.6504(6), b 10.1564(4), c 14.6954(5) Å, β 96.739(1)°, Z = 4. Crystal data for C27H24BrN4O5Re (6): monoclinic, space group P21, a 8.7791(9), b 16.312(2), c 8.9231(9) Å, β 90.030(1)°, Z = 2. In the experiment, the researchers used many compounds, for example, 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde (cas: 3012-80-4Name: 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde).
1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde (cas: 3012-80-4) belongs to imidazole derivatives. Imidazole derivatives generally have good solubility in protic solvents. Simple imidazole derivatives, such as 1H-imidazole, 2-methyl-1H-imidazole, and 1,2-dimethylimidazole, have very high solubility in water. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Name: 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem