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Full-Text Articles in Biochemistry
Seven Coordinate Molybdenum And Tungsten Complexes Containing Tpm And Tpm Derivatives And The Impact Of Ligand Substitution On Nmr Chemical Shifts, Cole Seager
Undergraduate Honors Thesis Collection
A series of known and new seven coordinate molybdenum and tungsten complexes of tris(pyrazolyl)methane (Tpm) and substituted Tpm, [TpmM(CO)3X]+, have been synthesized. Depending on the identity of X, (bromo, iodo, hydrido) and the substitution of the Tpm ligand, substantial chemical shift differences are observed for the hydrogen on the central carbon of the Tpm ligand. Factors impacting the chemical shift of the hydrogen on the central carbon of the Tpm ligand, such as the electron donating ability of the Tpm ligand and the electronegativity of the additional ligand on the metal, will be discussed.
Case Studies Of Potential Reference Materials In Cultural Heritage Science, Heidi Kastenholz
Case Studies Of Potential Reference Materials In Cultural Heritage Science, Heidi Kastenholz
Undergraduate Honors Thesis Collection
The study of cultural heritage objects requires reference materials for comparison in order to determine the identity of chemical compounds in historically/culturally significant artifacts. The reference materials available today can be inaccurately labeled, can contain inauthentic compounds, or can simply be formed differently than what the labeled material should be. Utilizing the laboratory at the Indianapolis Museum of Art at Newfields, three case studies were conducted over three different potential reference materials in order to properly identify each of the three materials being focused on here. Based on the analysis, the labels for these materials often do not match the …