The electronic spectra o f bromo complexes o f main group metal ions with an s2 electronic configuration (SnBr3~, PbBr3~, PbBr42_, SbBr4~, SbBr63~, BiBr4~, BiBr63~) in acetonitrile show long-wavelength absorption bands which are assigned to metal-centered sp transitions. Com­ pared to the corresponding chloro complexes the sp bands o f the bromo complexes appear at longer wavelength due to sp/L...

Three azo group-containing Schiff base ligands, namely 1-{3-[(3-hydroxypropylimino) methyl]-4-hydroxyphenylazo}-4-nitrobenzene (2a), 1-{3-[(3-hydroxypropylimino) methyl]-4-hydroxyphenylazo}-2-chloro-4-nitrobenzene (2b) and 1-{3-[(3-hydroxypropylimino) methyl]-4-hydroxyphenylazo}-4-chloro-3-nitrobenzene (2c) were prepared. The ligands were characterized by elemental analysis, FTIR spectroscopy, ...

In the two square-planar palladium(II) complexes chloro[(diphenylphosphinoamino)diphenylphosphine oxide]methylpalladium(II) dimethyl sulfoxide solvate, [Pd(CH3)Cl(C24H21NOP2)].C2H6OS, (I), and chloro{[2-(diphenylphosphino)phenyl]diethoxymethane}methylpalladium(II), [Pd(CH3)Cl(C23H25O2P)], (II), a trans disposition of the diphenylphosphino and chloro groups is observed. The Pd atom in both compl...

A new unsymmetric thioether diamine N - ( 2 - ( 2 - aminophenylthio) ethyl) benzene - 1 , 2 - diamine was prepared through the nucleophilic substitution of cysteaminium chloride with 1 - chloro - 2 - nitrobenzene and then the nitro groups of prepared compuond converted to the amine by zinc powder and ammonium chloride. Then, unsymmetric Schiff bass ligand 2 - ((( 2 - (( 2 - (( 2 - (( 2 - hydrox...

The platinum(II) complexes trans-[PtCl₂(Ln)₂]∙xSolv 1-13 (Solv = H₂O or CH3OH), involving N6-benzyladenosine-based N-donor ligands, were synthesized; L(n) stands for N6-(2-methoxybenzyl)adenosine (L₁, involved in complex 1), N6-(4-methoxy-benzyl)adenosine (L₂, 2), N6-(2-chlorobenzyl)adenosine (L₃, 3), N6-(4-chlorobenzyl)-adenosine (L₄, 4), N6-(2-hydroxybenzyl)adenosine (L₅, 5), N6-(3-hydroxyben...

In pursuit of a new family mechanically responsive luminescent materials, it is aimed to differentiate triboluminescence (TL) from photoluminescence (PL). A β-diketonate ligand with tert-butyl groups (2,2,6,6-tetramethylheptane-3,5-dionate: tmh) selected quench EuIII-centered PL via ligand-to-metal charge transfer, whereas tmh provides efficient photosensitization TbIII ions. Bright TL observed...

The complete series of chloro- and bromo-cyclopentadienyl carbonyl complexes [(C5XnH5-n)Fe(CO)2R] (n=1–5, R=Me, Ph) could be prepared from the unsubstituted parent compounds via a sequence lithiations electrophilic halogenations. All four pentahaloyclopentadienyl were studied by X-ray diffraction show an interplay weak intermolecular X…X, X…O X…H interactions.

Reactions of chloro bridged complexes with R-3-(3-pyridyl)alanine afford the chelate complexes LnM[NH2CH(CO2)CH2C5H4NH+]Cl− (LnM = Ph3P(Cl)Pd, (tol3P)(Cl)Pd, (Ph-pyridyl)2Ir, Cp∗(Cl)Rh, Cp∗(Cl)Ir, (p-Cymol)(Cl)Ru) with protonated pyridine substituents. An analogous Cp∗Rh complex with 3-(2-pyridyl)alaninate was also obtained. Addition of base (NaOMe) to these complexes gives dimeric and trimeric...

Vinylation of the chloro–ethyl and dichloro zirconium complexes [Zr(CpSi2Cp)ClX] (CpSi2Cp=1,1%,2,2%-(SiMe2)2(h-C5H3)2; X=Et, Cl) with one or two equivalents of Mg(CH CH2)Cl gave the new zirconacyclopentane [Zr(CpSi2Cp){hCH2 (CH2)2 CH2}] and (h-butadiene)zirconium [Zr(CpSi2Cp){h-(butadiene)}] complexes, respectively. Addition of a toluene solution of PhC CPh to the zirconacyclopentane compound a...

Abstract A detailed study of the ability pyridine-2,6-dicarboxylic acid (1) and its 4-mono- 3,4,5-tri-substituted analogues to sensitize emission from Pr3+, Nd3+, Gd3+, Dy3+ Er3+ is presented. Sensitization Ln3+ was demonstrated via ligands in all complexes, excluding with covering spectral range 500 nm 1850 nm obtained variation ion. From ligand-based photoluminescence Gd3+-complexes, relative...