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Fluxional Behaviour of Isocyanide Derivatives of Dodecacarbonyltetrairidium
Author(s) -
Orlandi Alessandra,
Ros Renzo,
Roulet Raymond
Publication year - 1991
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19910740710
Subject(s) - chemistry , isocyanide , scrambling , metal , center (category theory) , rotation (mathematics) , stereochemistry , medicinal chemistry , computational chemistry , crystallography , organic chemistry , linguistics , philosophy , geometry , mathematics
The fluxional behaviour of [Ir 4 (CO) 11 ( t ‐BuNC)] ( 1 ) and [Ir 4 (CO) 11 (ArNC)] (Ar = 4‐methoxyphenyl, 4‐tolyl, phenyl, 4‐chlorophenyl, 4‐nitrophenyl; 2 – 5 ) has been investigated by 2D and variable‐temperature 13 C‐NMR. These techniques give new evidence of the processes responsible for CO exchange, namely two successive merry‐go‐rounds causing Cotton ‐like scrambling and a CO rotation about one metal center.