Pyris diamond tg dta thermal analyses system

Commercially available 5-bromosalicylaldehyde, 3bromosalicylaldehyde and 2-fluorobenzohydrazide were purchased from Aldrich and used without further purification. Other solvents and reagents were made in China and used as received. C, H and N elemental analyses were performed with a Perkin-Elmer elemental analyser. Infrared spectra were recorded on a Nicolet AVATAR 360 spectrometer as KBr pellets in the 4000-400 cm -1 region. UV-Vis spectra were recorded on a Lambda 900 spectrometer. Thermal stability analysis was performed on a Perkin-Elmer Pyris Diamond TG-DTA thermal analyses system. 2 L 1 andH 2 L 2 5-bromosalicylaldehyde or 3-bromosalicylaldehyde (1.0 mmol, 0.20 g) and 2-fluorobenzohydrazide (1.0 mmol, 0.15 g) were dissolved in methanol (30 mL) with stirring. The mixture was stirred for about 30 min at room temperature to give clear solution. The solvent was evaporated to give colorless crystalline products. For H 2 L

3-Bromosalicylaldehyde and N-ethylethane-1,2-diamine were purchased from Fluka. Cadmium nitrate and other reagents were analytical grade and used without further purification. The Schiff base HL was prepared by the condensation of equimolar quantities of 3-bromosalicylaldehyde with N-ethylethane-1,2-diamine in methanol. Elemental (C, H and N) analyses were made on a Perkin-Elmer Model 240B automatic analyser. Infrared spectrum was recorded on an IR-408 Shimadzu 568 spectrophotometer. X-ray diffraction was carried out on a Bruker SMART 1000 CCD diffractometer. Thermal analysis was performed on a Perkin-Elmer Pyris Diamond TG-DTA thermal analyses system.
Caution! Azido compounds of metal ions are potentially explosive especially in presence of organic ligands. Only a small amount of material should be prepared and it must be handled with care.

Commercially available 3-ethoxysalicylaldehyde, 4-methoxysalicylaldehyde and nicotinohydrazide were purchased from Sigma-Aldrich and used without further purification. Other solvents and reagents were made in China and used as received. H 2 L 1 and H 2 L 2 were prepared according to the literature method. 8 C, H and N elemental analyses were performed with a Perkin-Elmer elemental analyser. Infrared spectra were recorded on a Nicolet AVATAR 360 spectrometer as KBr pellets in the (4000-400) cm -1 region. Thermal stability analysis was performed on a Perkin-Elmer Pyris Diamond TG-DTA thermal analyses system. Molar conductivity data were determined with a DDS-11A conductometer.