Monohalogenobenzoylhydrazones III. Synthesis and structural studies of Pt(II), Pd(II) and Rh(III) complexes of Di-(2-pyridyl)ketonechlorobenzoyl hydrazones

Synthesis, Spectroscopic Characterization, and Crystal Structure of the Lanthanide(III) Complex [Ce(hydrazone)2(NO3)(NCS)(H2O)]NO3�2.35H2O

“…In the spectra of the complexes, band II is shifted toward higher frequencies. This band is an evidence of the coordination of the hydrazones via azomethine nitrogen atom [17]. Band III appears in the 24,000-29,000 cm −1 region and is assigned to n → π * transitions located on the carbonyl group.…”

“…For purposes of discussion, these bands are labeled I-III. Assignments were made on the basis of previously published electronic spectral data on metal hydrazone complexes [17][18][19][20][21][22][23]. The ligand shows an intense absorption band (I) at 44,444 cm −1 (methanol solution), 40,322 cm −1 (Nujol) assigned to π → π * transitions of the rings.…”

“…Much work has been done on crystal and spectral studies of hydrazone complexes with transition metal ions [8][9][10][11][12][13][14][15][16][17][18][19], but the number of crystal structures of lanthanide complexes with tridentate hydrazones is relatively small [20][21][22][23]. This paper presents the characterization of the new complexes formed by the reaction between the complexes of the type [Ln(PBH) 2 (NO 3 ) 3 ]·CH 3 COCH 3 ·2H 2 O (PBH = 2-pyridinecarboxaldehyde benzoyl-hydrazone) [22] and ammonium thiocyanate.…”

Preparation, Identification of Two New Cd(II) Complexes including 4-(1H-Tetrazol-5-yloxy) – Phenylamine Cadmium(II) Chloride and 2-(1H-Tetrazol) - Pyridine Cadmium(II) Chloride

“…Tetrazoles are a class of synthetic organic heterocyclic compound, consisting of a 5-member ring of four nitrogen and one carbon atom (plus hydrogens) 8 . The simplest is tetrazole itself, CN 4 H 2 9,10 . They are unknown in nature.…”

Monohalogenobenzoylhydrazones VI. New antimony(III) complexes with monochlorobenzoylhydrazones of 2-furaldehyde, 2-pyrrolaldehyde and 2-thiophenaldehyde as ligands

“…In order to test the coordination ability of the monohalogenobenzoylhydrazones towards metals from other parts of the periodic Table, we tried reactions with Pt(II), Pd(II), Rh(lll) and Sb(lII). The former metals gave several interesting compounds; their synthesis and structural study have recently been published [5]. The crystal structure and spectroscopic study of one of the latter complexes have already been reported [6], while the study of another one is still in progress [7].…”