Identification of an "end-on" nickel-superoxo adduct, [Ni(tmc)(O2)]+ |
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| Authors: | Kieber-Emmons Matthew T Annaraj Jamespandi Seo Mi Sook Van Heuvelen Katherine M Tosha Takehiko Kitagawa Teizo Brunold Thomas C Nam Wonwoo Riordan Charles G |
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| Institution: | Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA. |
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| Abstract: | An "end-on" Ni2+-superoxo adduct has been prepared via two independent synthetic routes and its structure ascertained by spectroscopic and computational methods. The new structure type in nickel coordination chemistry is supported by resonance Raman and EPR spectroscopic features, the former displaying a high frequency nu (O-O) mode (1131 cm-1) consistent with significant superoxo character. The Ni2+-superoxo adduct oxidizes PPh3 to OPPh3 in quantitative yield. |
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