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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > May  >
In the Laboratory
The Microscale Laboratory
Microscale Synthesis and 1H NMR Analysis of ZnIIand NiII Tetraphenylporphyrins
Laura Saucedo and Larry M. Mink
Department of Chemistry, California State University, San Bernardino, CA 92407
Cover
May 2005
Vol. 82 No. 5
p. 790
Abstract
A multiweek undergraduate laboratory involving the microscale synthesis of porphyrins and the corresponding metalloporphyrins is presented. All of the synthetic products are isolated as solid compounds, allowing for their analysis by UV–visible and 1H NMR spectroscopy. A Zn(II) porphyrin is representative of regular metalloporphyrins in which the metal is a closed-shell (d0 or d10) with little metal-to-ligand π backbonding. Ni(II) porphyrins are representative of hypsoporphyrins in which the metals are of d6 through d9, have filled dą orbitals and exhibit significant metal dπ-to-porphyrin π* backbonding. The correlation of spectral data with the nature of the metal to porphyrin interaction is presented.
Supplement
The experimental procedures and tables of the NMR chemical shifts and positions of the UV–visible bands are available.
*  Contents JCE2005p0790W.doc (Microsoft Word)
*  Download
JCE2005p0790W.pdf

JCE2005p0790W.zip
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*  Citation
 Saucedo, Laura; Mink, Larry M. J. Chem. Educ. 2005 82 790.
*  Keywords
 Bioinorganic Chemistry; Inorganic Synthesis; Microscale; NMR Spectrometry; Organic Synthesis; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 March 28, 2005
April 18, 2005
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