Synthesis of Gold Complexes From Diphosphine Ligands and Screening Reactions of Heterocyclic Acetylacetonato (ACAC) Ligands with Transitional Metal Complexes Page: 78
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123.0(4)
121.6(3) 121.4(4)
The bond length and bond angle parameters used here are from the [Ag(C9H6NO)(C9H6NO)]
complex; these were matched with those from other ligands as shown in Table 4.10. Ligand
abbreviations are used in the table; for instance, 8-HQ stands for 8-hydroxyquinoline, and 8-
HQ(HSO4) stands for 8-hydroxyquinolin-1-ium hydrogen sulfate monohydrate; for more
information about [Ag(C9H6NO)(C9H6NO)] please refer to the reference given in Figure 4.17.
Also, note that 8-HQ in complex and Q in complex belong to [Ag(C9H6NO)(C9H6NO)]; as one
can see from Figure 4.17, there is an 8-hydroxyquinoline ring (8-HQ) and a quinolate ring (Q-)
in the [Ag(C9H6NO)(C9H6NO)] complex.
4.5 Ligand B
Ligand B was prepared from syn-2-peridoxylaldoxime and ethyl malonyl chloride in the
same manner as ligand A. Details of the preparation are discussed under the experimental
section. Efforts to obtain the crystal structure were unsuccessful because the crystals were not
stable in air and decompose at room temperature. The impure ligand is deep red in color but
when purified, ligand B turns to golden orange. NMR was used to characterize the structure. The
NMR spectra of ligand B are shown in Figure 4.18-4.20.
The NMR of the starting material, syn-2-peridoxylaldoxime, has several chemical shifts.
The first peak was observed at 9.325 ppm. The latter was a broad peak likely to be hydroxyl in78
123.1(3)
120.5(1)
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Nyamwihura, Rogers. Synthesis of Gold Complexes From Diphosphine Ligands and Screening Reactions of Heterocyclic Acetylacetonato (ACAC) Ligands with Transitional Metal Complexes, thesis, August 2015; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc804890/m1/91/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .