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13 C relaxation in cyclopentadienyliron dicarbonyl acyl compounds
Author(s) -
Nance Lewis E.,
Will H. J.,
MacQueen D. Brent,
Garrison J. Mark,
Nicklaw Jeffrey M.
Publication year - 1989
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260270914
Subject(s) - chemistry , cyclopentadienyl complex , ring (chemistry) , protonation , proton , medicinal chemistry , carbon fibers , chemical shift , relaxation (psychology) , carbon 13 nmr , proton nmr , stereochemistry , organic chemistry , ion , social psychology , psychology , physics , materials science , quantum mechanics , composite number , composite material , catalysis
T 1 values for the protonated carbons of four acyl compounds, all possible combinations of methylpropanoyl and 2‐ethylbutanoyl groups with cyclopentadienyl‐ and methylcyclopentadienyl‐iron dicarbonyl, were determined at ambient temperature. Carbon‐13 T 1 ratios for the acyl group relative to the ring system indicate relative differences in motion when obtained in the two solvents, CDCl 3 and CD 2 Cl 2 . T 1 values at −10°C, relative to 24°C, give further insight into motional modes. Carbon‐13 and proton NMR chemical shift values for all compounds and the NOE for one compound are reported.