Synthesis and Structure Studies of Complexes of Some Second Row Transition Metals with 1-(Phenylacetyl and Phenoxyacetyl)-4-phenyl-3-thiosemicarbazide.

Mixed ligand complexes with 2-piperidine-carboxylic acid as primary ligand and ethylene diamine, 2,2′-bipyridyl, 1,10-phenanthroline and 2(2′-pyridyl)quinoxaline as secondary ligands: preparation, characterization and biological activity

“…trans-[UO 2 (pyq)(pa)] + complex shows a strong IR band at 928 cm )1 not observed in the Raman spectrum assigned to m as (UO 2 ) of the trans-O=M=O moiety [9]. On the other hand, the strong Raman band observed at 899 cm )1 assigned to m s (UO 2 ); in accordance with the likely trans geometry; these bands are very weak in the IR [9,12].…”

“…The electronic spectra of Pd (II) complexes, (1)-(4) in H 2 O and (5), (6) in DMSO, show two bands near 485 and 335 nm due to 1 A 1g fi 1 B 1g and 1 A 1g fi 1 E g , transitions in a square-planar configuration [12,32,37]. The electronic spectra of Ag (I) complexes, (7) and (8), show bands near 450(sh) and 330 nm can assign to square-planar geometry [12,32]. The electronic spectrum of [MoO 2 (pa) 2 ] in DMSO shows bands at 455 and 325(sh) nm can assign to ligand (p) to metal charge-transfer (MLCT) in octahedral geometry [38,39].…”

“…The thermogram of (2), [Pd(Hpa)(pa)]Cl AE 2-H 2 O, shows the first step weight loss of 8.17% between 46 and 145°C, which corresponds exactly to the release of two mmol of H 2 O per mmol of complex (calcd. 8.28%); the relatively low temperature of water loss shows that these water molecules are crystal lattice held [10,12]. The second decomposition step occurs between 260 and 310°C, this weight loss is attributed the loss of half Cl 2 and C 5 H 10 N fragments (calcd.…”

“…As part of our studies on mixed ligand complexes [9][10][11][12], this article reports the synthesis and characterization of the new mixed ligand complexes of 2-piperidine-carboxylic acid (Hpa, Scheme 1; H is the dissociable carboxylic proton) as a primary ligand with a number of transition metal ions. The mode of Hpa binding to the metal ions has been ascertained particularly by spectral (Raman, IR, 1 …”

Synthesis of new 4-methylesculetin complexes as anti-neoplastic agents and X-ray structure of dimeric bis-bipyridyl-bis-4-methylesculetinato zinc(II)

“…The thermal decomposition of cis-Na 2 [MoO 2 (mesc) 2 ].2. were studied using TGA analysis. The weight loss observed below 130°C is due to dehydration as the colors changed from pale to deep [18,48,51].…”