Application of 4488-22-6. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 4488-22-6, Name is [1,1′-Binaphthalene]-2,2′-diamine. In a document type is Article, introducing its new discovery.
The synthesis and characterization of the bis(bidentate) Schiff-base ligand [(R)-2] formed by the condensation reaction of (R)-1,1?-binaphthyl-2, 2?-diamine [(R)-BINAM] with pyridine-2-carboxaldehyde is presented. The coordination chemistry of (R)-2 with Ni(ClO4)2·- 6H2O, Co(ClO4)2·6H2O, CuCl2, and CuSO4 has been investigated. Reaction of (R)-2 with the first two metal salts leads to complexes of the type [M((R)-4) 2](ClO4)2 (M = NiII, Co II), where (R)-4 is a tridentate ligand resulting from the hydrolytic cleavage of one of the pyridyl groups from (R)-2. Both complexes were characterized by X-ray crystallography, which showed that the Lambda absolute configuration of the metal center is favored in both cases. 1H NMR spectroscopy suggests that the high diastereoselectivity of Lambda-[Co((R)-4) 2](ClO4)2 is maintained in solution. The reaction of (R)-2 with CuCl2 leads to the dinuclear complex [Cu 2((R)-2)Cl4], which has a [Cu2(mu 2-Cl2)] core. The reaction of CuSO4 with (R)-2 gives a dimeric complex, {Cu((R)-4)SO4}2, which features a [Cu2(mu2-(SO4)2)] core. This complex can be prepared directly by the reaction of (R)-BINAM with pyridine-2-carboxaldehyde and CuSO4. The use of rac-BINAM in this synthetic procedure leads to the heterochiral dimer [Cu2((R)-4)((S)- 4)(SO4)2]; that is, the ligands undergo a self-sorting (self/nonself discrimination) process based on chirality. The reaction of rao-BINAM, pyridine-2-carboxaldehyde, and Co(ClO4) 2·6H2O proceeds via a homochiral self-sorting pathway to produce a racemic mixture of [Co((R)-4)2]2+ and [Co((S)-4)2]2+. The variable-temperature magnetic susceptibilities of the bimetallic complexes [Cu2((R)-2)Cl 4], [Cu((R)-4)(mu2-SO4)]2, and [Cu2((R)-4)((S)-4)-(mu2-SO4)2] all show weak antiferromagnetic coupling with J = -1.0, -0.40, and -0.67 cm -1, respectively.
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