ÜBER DIOXIMINKOMPLEXE DER ÜBERGANGSMETALLE. LXXX. KATALYTISCHE POLAROGRAPHISCHE REDUKTION VON HYDROXYLAMIN IN ANWESENHEIT VON EISEN(II)-DIOXIMINKOMPLEXEN

The stability constants of the iron(II)-nyoximine chelates: Fe(Nyox. H)* and Fe(Nyox. H)2 in aqueous NaClO4 -Britton-Robinson buffer solutions have been determined polarographi- cally. In the Fe(II)-nyoxime system appears a catalytic wave in the presence of hydroxylamine, with a half wave potential of -0.90 V (vs. SCE), suitable for the quantitative polarographic determination of hydroxylamine, also in the presence of hydrazine

ON THE DIOXIMINE COMPLEXES OF TRANSITION METALS. PART XCIV. NEW RHODIUM(III) COMPLEXES WITH α-SUBSTITUTED ALIPHATIC AND ALICYCLIC OXIMES

Some chelating agents were obtained by condensation of the α-keto-oximes diacetyl-monoxime, methyl-isopropyl-2,3-dione-monoxime (2) and 1,2,3-cyclohexane trione dioxime (1,3) with semicarbazide and thiosemicarbazide. The formation of rhodium(III) chelates with these reagents was studied spectrophotometrically in a wide pH-range using the continuous variation method. Some derivatives were proposed for the analytical determination of this metal