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A Historical Survey Of Methods Of Solving Cubic Equations, Minna Burgess Connor

Master's Theses

It has been said that the labor-saving devices ot this modern age have been made possible by the untiring efforts of lazy men. While working with cubic equations, solving them according to the standard methods appearing in modern text-books on the theory of equations, it became apparent, that in many cases, the finding of solutions was a long and tedious process involving numerical calculations into which numerous errors could creep. Confessing to laziness, and having been told at an impressionable age that "any fool can do it the hard way but it takes a genius to find the easy …

The Dipole Moments Of A Series Of N, N-Diphenylbenzamides, James William Cooke

Master's Theses

In recent years amides have been used in synthetic fibers, plastics and in medicinal chemistry. Under­ standably, the literature contains many preparations and reactions of unsubstituted, monosubstituted and disubstituted amides, however, their structure has received very little attention. The information avail­ able on the amide group structure originates from studies made on the unsubstituted and mono substituted compounds. The phenomenon of association of the amides has received considerable attention.

Tetrazolium Salts, Andrew Garnett Richardson

Master's Theses

Tetrazolium salts, as the name indicates, are quartenary. Substitution is possible on positions 2, 3, and 5 of the ring as is shown in type formula (I). When these substituent groups are bifunctional ditetrazolium salts of types (II), (III), and (IV) result. Compounds bridged at both R' and R'' at the same time are theoretical possible, but no such cases have been reported, probably on account of the practical limitations of synthesis. The anion, which is indicated by X, may be halide, sulfate, acetate, picrate, succinate, thiocyanate, or practically any atom or group capable of existing as a negative ion.

Chelation Of The Transition Metal Ions With A Series Of Polyhodrozyamine Compounds, William Percy Moore

Master's Theses

Chelation was reviewed with emphasis on the work done by contemporary workers.

The following polyhydroxyamine compounds were synthesized, purified and· analyzed:

1,2-bis[tris(hydroxymethyl)methylamino]ethane dihydrochloride

1,3-b1s[tris(hydroxymethyl)methylamino]propane dihydrochloride

1,3-b1s[tris(hydroxymethyl)methylamino]-2-propanone dihydrochloride

1,2,3-tris[tris(hydroxymethyl)methylamino)propane tri­ hydrochloride

The latter two compounds have not been reported in the literature.

Chelates were prepared by reacting the above compounds, and 1-3bis[tris(hydroxymethyl)methylamino]-2-propanol dihydrochloride ("disec") and the "disec" free base, with the ions of the first transition metals. Stability cons­tants were obtained where appreciable coordination occurred before precipitation of the metallic ion took place . A list of the metal ions studied with one or more chelating agents follows: Cu⁺², …