Literaturnachweis - Detailanzeige
| Autor/in | Venable, T. Leon |
|---|---|
| Titel | NMR Spectroscopy in an Advanced Inorganic Lab: Structural Analysis of Diamagnetic and Paramagnetic Ni(II) Schiff Base Complexes |
| Quelle | In: Journal of Chemical Education, 96 (2019) 3, S.577-581 (5 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
| Zusatzinformation | ORCID (Venable, T. Leon) |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0021-9584 |
| DOI | 10.1021/acs.jchemed.8b00399 |
| Schlagwörter | Spectroscopy; Inorganic Chemistry; Science Laboratories; Advanced Courses; College Science; Science Instruction; Laboratory Experiments; Geometry; College Students |
| Abstract | In a two-step synthesis starting with Ni(CH[subscript 3]COO)[subscript 2] ·4H[subscript 2]O and salicylaldehyde, students prepare Nethyl and N-isopropyl Ni(II) Schiff base (imine) complexes. After isolation and recrystallization, the products are characterized by room-temperature magnetic susceptibility measurements, FTIR spectroscopy, and [superscript 1]H, [superscript 13]C{[superscript 1]H}, and [superscript 13]C DEPT-135 or [superscript 13]C APT NMR spectroscopy. The results are analyzed by considering the steric requirements of the ethyl and isopropyl groups and the subsequent effect on the preferred geometries, either the diamagnetic square-planar geometry, as expected for a Ni(II) d[superscript 8] complex, or the paramagnetic tetrahedral geometry. Students are challenged to explain why the spectra for these similar complexes are so different and what this difference reveals about steric requirements in determining geometry. (As Provided). |
| Anmerkungen | Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2020/1/01 |
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