Search Results
ammonium ions (Nessler control) and dried at 303 K to constant mass for 2 days. The compounds were identified by the method of elemental analysis (with a Perkin-Elmer CHN 2400 elemental analyzer) and on the base of IR spectra recorded over the range of 4000
titration. Methods and instruments IR spectra were recorded using a NICOLETT 6700 Spectrometer (4000–400 cm −1 with accuracy of recording 1 cm −1 ) using KBr pellets. Molar conductance was measured on a conductivity meter
-pyrrolo[3,4-c]pyridine-1,3(2H)-dione 1 H NMR spectra were obtained on a 300 MHz Brucker instrument. The samples were prepared by dissolving 5 mg of each form in 600 μl of CDCl 3 . IR spectra (KBr cm −1
Complexes of the selected transition metal ions with 4-methoxycinnamic acid
Physico-chemical properties
.03 21.68 21.48 The IR spectra of complexes were recorded over the range of 4,000–400 cm −1 using M-80 spectrophotometer (Carl Zeiss, Jena). Samples for
Abstact
5-Chloro-2-nitrobenzoates of Co(II), Ni(II) and Cu(II) having formulae Co(C7H3O4NCl)2·3H2O, Ni(C7H3O4NCl)2·3H2O and Cu(C7H3O4NCl)2·2H2O, were obtained as polycrystalline compounds. From the IR spectra analysis of complexes, sodium salt and according to the spectroscopic criteria the carboxylate ions seem bidentate groups. The complexes of Co(II) and Cu(II) lose the water of crystallization in one step at 363–523 K. The Ni(II) complex loses it in two stages in the ranges of 323–378 and 378–523 K, respectively. The compounds follow the Curie–Weiss law. The magnetic moment values experimentally determined change from 4.53 to 4.55 μB for Co(II) complex, from 2.34 to 2.97 μB for Ni(II) 5-chloro-2-nitrobenzoate and from 1.80 to 1.90 μB for Cu(II) complex.
Press , San Diego, US , pp. 2651 – 2661 . Snavely , D.L. & Dubsky , J. ( 1995 ): Near-IR spectra of polyethylene, polyethylene glycol and
XRD patterns of natural chrysotile asbestos samples The FT-IR spectra of all chrysotile samples are presented in Fig. 3 . In the region 3,000–4,000 cm −1 , two IR bands are well visible. First strong at 3
• for IR studies Mattson FTIR Spectrometer Genesis II, IR spectra were recorded in the range of wave numbers 400–4000 cm −1 , samples were prepared as KBr pellets, studies were carried out at the same time of cement hydration as in the case of TG and
carried out, in inert atmosphere, with the use of an SDT 2960 (TA Instruments). Initial mixtures and monophase samples were examined by IR spectroscopy. The IR spectra were recorded at wave numbers 1,200–250 cm −1 , using a spectrometer of SPECORD
.4139(2) IR spectroscopy The phases Zn 2 FeV 3 O 11 and Mg 2 FeV 3 O 11 as well as solid solution Zn 2− x Mg x FeV 3 O 11 were also subjected to an investigation with the aid of infrared spectroscopy (IR). Figure 1 shows the IR spectra of pure
