Some Recent Developments in the Chemistry of Transition Metal Oxocations

Abstract

50 ml of chlorobenzene. The mixture is stirred for 1 hour, and the solvent is then distilled off in vucuo. Recrystallization of the residue [9 g (97.3%), m.p. 128-131 "C] from ethyl acetate yields analytically pure 3-phenyl-4-p-toluenesulfonylimino-1,3-thiazetidin-2-one, m.p. 139 "C (cf. Section IV, 2). 2-Ph~nytimino

Synthesis and Characterization of Homobinuclear Complexes of UO2(VI), ZrO(IV) and Th(IV) ions with 3-Benzylidine/Furfurylidine/(Pyridyl/Thienyl-2'-methylene) imino-5-p-sulphonamido phenyl azo-2-thiohydantoins

“…The uranyl complexes exhibit a strong band a ~940-900 cm -1 and the medium intensity band at 835-820 cm -1 assignable to ν as (O=U=O) and ν s (O=U=O) mode respectively. 17 The zirconyl complexes exhibit one strong band in the region ~900-870 cm -1 which can be attributed to the ν(Zr=O) indicating the presence of (Zr=O) 2+ moiety in these complexes.…”

An investigation on the solid-state thermal decomposition behaviour of uranyl(II)diaquatris(oxalato)lanthanate(III)octahydrate and cobalt(II)uranyl(II)pentaquatris(oxalato)lanthanate(III)octahydrate

“…The IR spectra of the complexes and the assignments of the different bands are shown in Table 1. The chelating character of the oxalate groups as well as the presence of coordinated water and water of crystallization in both the compounds has been concluded like earlier studies [22,[27][28][29]. Due to coordination of large number of water with linear trans-UO 2 groups [30] which are also linked with C 2 O 4 2À in the structure, the bands for n asy (O5 5U5 5O) and n s (O5 5U5 5O) are shifted to lower frequency.…”

Raman spectroscopic study of the arsenite mineral vajdakite [(Mo6+O2)2(H2O)2As3+2O5]·H2O

“…[1] An infrared band observed at 1401 cm −1 may be attributed to an overtone and/or a combination band. [1] Interpretation of the Raman spectra of vajdakite is based on the papers by Cotton and Wing, [26] Selbin, [27] Baran et al, [28] Hardcastle and Wachs, [29] Tossell, [30] Ogden and Williams, [31] Bencivenni and Gingerich, [32] Mihailova et al, [33] Wood et al, [34] Smit et al, [35] Daturi et al [36] and Tossell and Zimmermann. [37] Raman bands at 953 and 951 cm −1 were attributed to the ν Mo-O terminal stretching vibrations (ν 1 Mo-O symmetric stretch [29] ), whereas the corresponding infrared band was observed at 951 cm −1 (Fig.…”