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Retraction of Kumar et al., Science 270 (5236) 628-630.

Science 3 October 1997:
Vol. 278. no. 5335, pp. 17 - 20
DOI: 10.1126/science.278.5335.17h
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Letters

Resonance Raman Results: Retraction

We wish to alert readers that the resonance Raman spectra reported in two papers (Reports, D. Qiu et al., 6 May 1994, p. 817; M. Kumar et al., 27 Oct. 1995, p. 628) (1, 2) have been found to be unreliable and to consist of artifacts. However, the non-Raman data in both reports are reliable. We are confident that all the samples were properly prepared and contained the reaction intermediates under investigation. However, we have been unable to reproduce the Raman spectra with fresh samples, and judge the published spectra to be artifacts resulting from electronic processing of the data.

This retraction affects our main conclusions in both papers about the metal(s) to which CO and methyl bind in CODH, because these conclusions rested heavily on the reported isotope sensitivity of signals that we now consider spurious. We are working to produce positive new evidence regarding this topic.


Thomas G. Spiro
Department of Chemistry,
Princeton University,
Princeton, NJ 08544, USA

REFERENCES

  1. D. Qiu, M. Kumar, S. W. Ragsdale, T. G. Spiro, Science 264, 817 (1994) [Abstract/Free Full Text] .
  2. M. Kumar, D. Qiu, T. G. Spiro, S. W. Ragsdale, ibid. 270, 628 (1995) .

How to Submit a Letter to the Editor

Volume 278, Number 5335, Issue of 3 October 1997, pp. 17-20.
©1997 by The American Association for the Advancement of Science.




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