A Double Isotopic Labelling Study of the Infrared Spectra of the Linkage Isomers [Pd(bipy)(SCN)2], [Pd(bipy)(NCS)2] and Related Complexes |
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| Authors: | Carola Engelter David A. Thornton Gareth M. Watkins |
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| Affiliation: | Department of Inorganic Chemistry , University of Cape Town , Rondebosch , 7700 , South Africa |
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| Abstract: | Abstract The IR spectra of the linkage isomers [Pd(bipy)(SCN)2] and [Pd(bipy)(NCS)2] have been determined in the C≡N stretching region (2200–2000 cm?1) and below 500 cm?1. The band shifts resulting from deuteration of the 2,2′-bipyridine (bipy) ring and 15NCS-labelling are shown to provide a ready means for distinguishing between the internal ligand modes, the μPd-N(bipy) and μPd-SCN/μPd-NCS vibrations. The assignment technique has been further extended to the complexes [Pt(bipy)(SCN)2] and [Pd(phen)(SCN)2] (phen = 1,10-phenanthroline). Finally, a comparison between the IR spectra of [Pd(bipy)(NCO)2], [Pd(bipy)(NCS)2] and [Pd(bipy)(SCN)2] reveals that the frequencies μM-NCO, μM-NCS and μM-SCN decrease in the sequence NCO > NCS > SCN. |
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| Keywords: | Europium LSR Eu (FOD)3 Eu (HFC)3 Eu (FACAM)3 4,5-Dihydro-5-methyl-4-oxo-5-phenyl-2-furancarboxylic acid methyl ester Antihyperlipoproteinemic Enantiomeric excess Lanthanide-induced shifts Analysis Stereoisomer. |
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