Vibrational spectra of ethylenediamine complexes of Pt(IV) Ir(III) and Rh(III)
1973; Elsevier BV; Volume: 9; Issue: 3 Linguagem: Inglês
10.1016/0020-1650(73)80239-9
ISSN1878-3473
AutoresDavid W. James, Matthew J. Nolan,
Tópico(s)Crystal structures of chemical compounds
ResumoTwenty eight salts of (+), (−) or (±)-[M(en)3]3+ (M = Co, Cr), of known ring conformation, have been synthesised and their IR spectrum measured (KBr disc) in the 1100−700 cm−1 region.Characteristic four-band patterns (1045, 1000, 890, 875 ± 5 cm−1) were observed for simple salts with the lel3 [Λ(δδδ), Δ(λλλ)] conformation and this pattern was used in the assignment of chlorometalate salts with unknown conformations. Complexes with mixed ring conformations give more structured vibrational patterns, and the data are not sufficiently systematic to be used for conformational assignment. Any IR based conformational analysis in salts with oxyanions is less secure due to anion interference.
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