Remarkable stability of (η5-C5H5)Re(CO)2L (L = n-heptane, xe, and kr): A time-resolved infrared spectroscopic study of (η5-C5H5)Re(CO)3 in conventional and supercritical fluid solution

Xue Zhong Sun, David C. Grills, Sergei M. Nikiforov, Martyn Poliakoff, Michael W. George

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Abstract

Employing fast time-resolved infrared (TRIR) spectroscopy we have characterized CpRe(CO)2(n-heptane), CpRe(CO)2(Xe), and CpRe(CO)2(Kr) (Cp = η5-C5H5) at or above room temperature in n-heptane, supercritical Xe, and Kr solution. The reactivity of CpRe(CO)2(n-heptane) with CO (k2 = 2.1 (±0.5) x 103 mol-1 dm3 s-1) shows this complex to be the least reactive of the reported organometallic alkane complexes. We report a trend in reactivity of the early transition metal alkane complexes. CpRe(CO)2(Xe) and CpRe(CO)2(Kr) are also shown to have significant stability. CpRe(CO)2(Xe) is less reactive toward CO than all of the reported alkane complexes except CpRe(CO)2(n-heptane).

Original languageEnglish
Pages (from-to)7521-7525
Number of pages5
JournalJournal of the American Chemical Society
Volume119
Issue number32
DOIs
Publication statusPublished - Aug 13 1997

ASJC Scopus subject areas

  • Chemistry(all)

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