Kristian Jensen

Infrared spectra of transition metal coordination compounds with the formaldoximate ion

Abstract The infrared spectra of Ni(IV), Fe(IV), Mn(IV) and V(IV) complexes with the formaldoximate ion of the type M I 2 [M IV (CH 2 NO) 6 ] (M I = Li, Na. K, Rb, Cs) have been measured in the region 4000–4030 cm −1 . Vibrational assignments for the infrared active fundamentals of the complex ions assuming S 6 symmetry have been based on the isotopic frequency shifts due to H/D, 14 N/ 15 N and 58 Ni/ 62 Ni substitutions and on the assignment of the fundamental bands observed in the infrared spectrum of sodium formaldoximate, CH 2 NONa, and CD 2 NONa (4000–4200 cm −1 ). The assignments of the ligand Skeletal modes of vibration compare well with the results obtained for sodium hexanitrocobaltate (III) , Na 3 [Co(NO 2 ) 6 ] [1].

Infrared spectroscopic study of some transition metal compounds with coordinated formaldoximate ion

Abstract The infrared spectra of complexes of some transition metals (V, Mn, Fe and Ni) in tne oxidation state +4 with the formaldoximate ion CH 2 NO − have been studied in the region 4000–4030 cm − . Spectra of isotopic substituted compounds ( 58 Ni, 62 Ni, 54 Fe, 57 Fe, 15 N and D) have also been recorded. The complexes have been shown to be of the type M 2 I [M IV (CH 2 NO) 6 ] (M I = Li, Na, K, Rb and Cs) with the nitrogen atoms bonded to the central atom. The molecular structure of the complex ions belonging to the point group S 6 and the frequency values of the metal-ligand stretching vibrations seem to have been established.

The configuration of transition metal coordination compounds containing the anion of hexahydro-1,3,5-triazine-1,3,5-triol

Abstract The configuration of Ni(IV), Fe(IV), Mn(IV) and V(IV) complexes of the type MI2[MIVL2] where MI=Li, Na, K, Rb and Cs and the ligand L is the anion C3H6N3O3−3 of hexahydro-1,3,5-triazine-1,3,5-triol has been obtained by studying the infrared spectra of the complexes in the region 4000-50 cm−1. Vibrational assignments for the observed bands of the complex ions have been made assuming the molecular symmetry D3d. The assignments have been based on the observed isotopic frequency shifts due to the substitutions H/D, 14N/15N, 12C/13C, 58Ni/62Ni and 54Fe/57Fe and on the assignment of the bands in the infrared spectrum of hexahydro-1,3,5-triazine-1,3,5-triol, C3H6N3 (OH)3.