Bis(amino)acenaphene (R-BIAN) molecules with sterically demanding substituents have been widely used as ligands in both transition metal and main group chemistry. The most commonly used compounds of this type are 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-BIAN) and 1,2-bis[(2,4,6-trimethylphenyl)imino]acenaphthene (mes-BIAN). The Chemistry Department at Sarah Lawrence College recently acquired a new 60 MHz benchtop NMR spectrometer, and we wished to employ this instrument in our research projects involving the synthesis of new R-BIAN complexes of vanadium and other transition metal elements. However, the low field strength of benchtop NMR spectrometers can make interpreting the spectra large molecules such as R-BIANs extremely challenging. In order to assess the utility of our benchtop NMR spectrometer for our research, we first collected <sup>1</sup>H and <sup>13</sup>C NMR spectra of R-BIAN compounds using this instrument. We then compared our spectra with the published data, which were collected on high-magnetic-field-strength instruments. In our poster, we will present our spectra and discuss the utility of low-magnetic-field NMR spectrometers for the characterization of complexes containing large ligands such as R-BIAN.

NMR spectra of bis(amino)acenaphthene molecules obtained using a 60 MHz benchtop NMR instrument

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.