Purchase Of Some Chemicals - ( 1 ) Tetramethylenepentaamine, 250 / 500 Ml, Alfa Aesar / Aldrich / Fluka / Other; ( 2 ) Pentamethylenehexaamine, 250 / 500 Ml, Alfa Aesar / Aldrich / Fluka / Other; ( 3 ) Hexane, 2.5 L, Himedia / Merck / Srl; ( 4 ) Acetonitrile, 2.5 L, Himedia / Merck / Srl; ( 5 ) Dichloromethane, 2.5 L, Himedia / Merck / Srl; ( 6 ) Dimethylsulphoxide, 1 L / 2.5 L, Himedia / Merck / Srl; ( 7 ) Dimethylformamide, 1 L / 2.5 L, Himedia / Merck / Srl; ( 8 ) Cobalt Acetate, 100 / 250 / 500 G, Himedia / Srl / Merck; ( 9 ) Potassium Iodide, 100 / 250 G, Himedia / Srl / Merck; ( 10 ) 8-Aminoquinoline, 5 / 25 G, Alfa Aesar / Aldrich / Fluka; ( 11 ) Nickel Carbonate, 250 / 500 G, Srl / Merck / Himedia; ( 12 ) Silver Nitrate, 25 / 100 G, Himedia / Srl / Merck; ( 13 ) Pyridine-2-Carboxaldehyde, 100 Ml, Alfa Aesar / Aldrich / Fluka; ( 14 ) 2, 2’-Dipyridylamine, 5 / 25 G, Alfa Aesar / Aldrich / Fluka / Others; ( 15 ) 2-Benzoylpyridine, 50 / 100 G, Sigma-Aldrich / Fluka / Other; ( 16 ) Mercuric Iodide, 100 G, Srl / Merck / Himedia; ( 17 ) Sodium Perchlorate, 250 / 500 G, Alfa Aesar / Aldrich / Fluka / Other; ( 18 ) Sodium Dicyanamide, 100 / 250 G, Alfa Aesar / Aldrich / Fluka; ( 19 ) Ammonium Hexafluorophosphate, 25 / 100 G, Alfa Aesar / Aldrich / Fluka; ( 20 ) N, N’-Dimethylethylene-Diamine, 5 / 25 / 100 Ml, Alfa Aesar / Aldrich / Fluka / Other; ( 21 ) 2-Acetylpyridine, 100 / 250 Ml. Alfa Aesar / Aldrich / Fluka / Other; ( 22 ) Tris ( 2-Aminoethyl ) Amine, 100 / 250 Ml. Alfa Aesar / Aldrich / Fluka / Other; ( 23 ) Ruthenium Trichloride, 5 / 25 G, Srl / Himedia / Merck / Other; ( 24 ) Osmic Acid, 1 G, Srl / Himedia / Merck / Other; ( 25 ) Parafilm, 1 Roll, Imported.