Solution structure of chromium [CrIII(L)(O-O)]n complexes (L = nitrilotriacetate, N,N-.beta.-alaninediacetate; O-O = malonate, oxalate, acetylacetonate, 2H2O) and characterization of (.mu.-OH)2[Cr(nta)(OH)]22- by deuteron NMR spectroscopy

Autor:	R. J. Bianchini, J. I. Legg, N. Koine
Rok vydání:	1986
Předmět:	Stereochemistry Acetylacetone Infrared spectroscopy Nuclear magnetic resonance spectroscopy Medicinal chemistry Oxalate Inorganic Chemistry NMR spectra database chemistry.chemical_compound Malonate chemistry Proton NMR Physical and Theoretical Chemistry Hydrate
Zdroj:	Inorganic Chemistry. 25:2835-2841
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic00236a035
Popis:	The complexes (Cr/sup III/(L)(O-O))/sup n/ (L = nitrilotriacetate (nta), N,N-..beta..-alaninediacetate (..beta..-alada); O-O = malonate (mal), oxalate (ox), acetylacetonate (acac), 2H/sub 2/O) have been synthesized, chromatographically purified, and characterized by deuteron NMR, infrared and electronic absorption spectroscopy. The two possible isomers, symmetrical (sym) and unsymmetrical (unsym), for (Cr(..beta..-alada)(acac))/sup -/ and (Cr(..beta..-alada)(mal))/sup 2 -/ were isolated, but only the unsym isomer for (Cr(..beta..-alada)(ox))/sup 2 -/ was found. The starting materials for the synthesis of these complexes, (Cr(nta)(OH))/sub 2//sup 2 -/ and unsym-(Cr(..beta..-alada)(H/sub 2/O)/sub 2/), were also characterized. Both species were shown to be in equilibrium with the corresponding monomer and dimer, respectively. The chemistry of the various species investigated differs, to some extent, from what has been previously reported. The recent availability of a readily applicable NMR technique for the study of Cr(III) chemistry (/sup 2/H NMR) has greatly facilitated these studies.
Databáze:	OpenAIRE
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