This paper presents the results of an X-ray absorption spectroscopy (XAS) study of six "Costa type" organocobalt B12 model compounds [LCo(DO)(DOH)pnR]ClO4, where L = H2O and (DO)(DOH)pn = N2,N2′-propanediylbis(2,3-butanedione 2-imine 3-oxime) and the R groups are different axial alkyl ligands. The dibromo and dichloro complexes [Co(DO)(DOH)pnX2] have been studied as well. The structural data obtained from the EXAFS spectra, namely the Co-C bond lengths, have been correlated with the pKa and Taft σ* of the alkyl group.
X-ray absorption spectroscopic study of "costa type" organocobalt coenzyme B12 models / Giorgetti M.; Berrettoni M.; Conti P.; Di Cicco A.; Marassi R.; Ascone I.. - In: ORGANOMETALLICS. - ISSN 0276-7333. - STAMPA. - 15:16(1996), pp. 3491-3495. [10.1021/om9509453]
X-ray absorption spectroscopic study of "costa type" organocobalt coenzyme B12 models
Giorgetti M.;
1996
Abstract
This paper presents the results of an X-ray absorption spectroscopy (XAS) study of six "Costa type" organocobalt B12 model compounds [LCo(DO)(DOH)pnR]ClO4, where L = H2O and (DO)(DOH)pn = N2,N2′-propanediylbis(2,3-butanedione 2-imine 3-oxime) and the R groups are different axial alkyl ligands. The dibromo and dichloro complexes [Co(DO)(DOH)pnX2] have been studied as well. The structural data obtained from the EXAFS spectra, namely the Co-C bond lengths, have been correlated with the pKa and Taft σ* of the alkyl group.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
