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In the discussion of the IR spectra, I suggest to use the classical criteria of the textbook of Nakamoto. Positions of the carboxylate bands are not very indicative of coordination. However, the change on ¦¤ (difference between symmetric and asymmetric bands) gives information on the coordination mode.
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        The changes on symmetric and asymmetric bands are 194 ¨C 170 cm−1." Does it indicate any type of binding mode of the carboxylate groups? Two reviewers have indicated what to do and yet the changes did not address much.
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