In an article, author is Amariei, Georgiana, once mentioned the application of 637-01-4, COA of Formula: https://www.ambeed.com/products/637-01-4.html, Name is N1,N1,N4,N4-Tetramethylbenzene-1,4-diamine dihydrochloride, molecular formula is C10H18Cl2N2, molecular weight is 237.17, MDL number is MFCD00012482, category is amides-buliding-blocks. Now introduce a scientific discovery about this category.
Structural studies of a series of uranyl alkylacetamides and piracetam complexes obtained in nitric acid aqueous solution
Three uranyl amide complexes have been isolated from slow evaporation technique from an aqueous solution of nitric acid (0.5 M), in the presence of N’,N-diethylacetamide (noted dam; compound 1), N-ethylacetamide (noted earn; compound 2) and 2-(2-oxopyrrolidino)acetamide (or piracetam, noted pam; compound 3). It results in the formation of crystalline molecular assemblies of UO2(L)(2)(NO3)(2) neutral moieties (L = amide ligand), in which the uranyl center is coordinated to two chelating nitrate groups either in cis positions (1) or trans positions (2 and 3) and two organic ligands, through the amide functionality. The corresponding coordination geometry for uranyl is a hexagonal bipyramid, with the two typical trans U=O bondings. Single-crystal X-ray diffraction analysis revealed the bond lengths of U-O-amide are found to be for 2.362(3), 2.363(3) and 2.374(2) angstrom for 1, 2 and 3, respectively. The three complexes have been further characterized by infrared spectroscopy and their thermal behavior has been evaluated by thermogravimetry. (C) 2017 Elsevier Ltd. All rights reserved.
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