Abstract
The synthesis and characterization of molybdenum(II) porphyrin dimers containing unbridged metal-metal quadruple bonds are presented. Variable temperature 300 MHz 1H NMR studies of meso-substituted derivatives provide novel solution evidence for both the existence of quadruple bonds and for a barrier to rotation about the metal-metal bonds in these complexes. The activation energy for this rotational process is 10.1 ± 0.5 kcal·mol-1.
Keywords: low-valent molybdenum-porphyrin complexes, variable temperature NMR
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Collman J. P., Barnes C. E., Woo L. K. Systematic variation of metal-metal bond order in metalloporphyrin dimers. Proc Natl Acad Sci U S A. 1983 Dec;80(24):7684–7688. doi: 10.1073/pnas.80.24.7684. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cotton F. A., Curtis N. F., Harris C. B., Johnson B. F., Lippard S. J., Mague J. T., Robinson W. R., Wood J. S. Mononuclear and Polynuclear Chemistry of Rhenium (III): Its Pronounced Homophilicity. Science. 1964 Sep 18;145(3638):1305–1307. doi: 10.1126/science.145.3638.1305. [DOI] [PubMed] [Google Scholar]