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NMR study of the bonding character in bis(ethylene)rhodium(I)—4-imino-2-pentanone chelates

1974; Elsevier BV; Volume: 64; Issue: 2 Linguagem: Inglês

10.1016/s0022-328x(00)87916-4

1872-8561

J. Krˇi ́zˆ, K. Bouchal,

Lanthanide and Transition Metal Complexes

The NMR spectra of the ethylene protons in bis(ethylene)rhodium— 4-imino-2-pentanone chelates have been analyzed. The ethylenic ligand molecules are physically and chemically nonequivalent; the ethylenetrans with respect to nitrogen is more reactive for exchange with other ligands and is more sensitive to structural effects in the chelate moiety; substitution by electron- acceptor groups in the iminopentanone part leads to a lowering of π-electron density in the ethylene ligands.