Convergent preparative routes to new urea-pyrazolate dinucleating ligands are described. Metal complexes of these ligands have hydrogen bond donors that are proximal to the metal centers that interact with other coordinated species. This is exemplified by Co(II) dimers with Co(II)-mu-Cl-Co(II) motifs, in which the chloro ligand is involved in four intramolecular hydrogen bonds. These noncovalen...

The stability constants of Mn(II), Fe(II) and Zn (II) with p-Chloro Malonamic acid (PCMA), pAmino Malonamic Acid (PAMA), p-Nitro Malonamic Acid (PNMA) different percentage of dioxane water has been determined pontentiometrically by Calvin-Bjerrum titrations. The titrations were carried out at constant ionic strength (0.1 M) and constant temperature i.e. 27±0.1°C. The data obtained can be used t...

The photophysical properties of several Cu(i) complexes coordinated with cyclic (alkyl)(amino)carbene (CAAC) ligands were examined. All the compounds were found to be phosphorescent, regardless of whether they are 2-, 3- or 4-coordinated. Aggregate and excimer emission were observed from 2-coordinate CAAC-CuCl derivatives in methylcyclohexane solution. Emission from the complex 4-coordinated wi...

A convenient synthesis of a series new ?-fluoroalkoxyvinyl aldehydes and their corresponding alcohols from ?-chloro-?,?-unsaturated was developed. The etherification reaction the carbonyl reduction were successfully achieved, affording desired products in good yields. mechanism nucleophilic vinylic substitution 3-chloro-3-phenylacrylaldehyde has been studied using DFT methods. IRC analysis show...

Refluxing a slightly acidic /?-BuOH solution of RhCKPPh,), and 2-chloro-, 2,4-dichloro-, or 2,4,6-trichloroazobenzene affords cyclometalated complexes (1) via loss of one phosphine ligand and oxidative addition of the ortho -C-Cl bond. X-ray structural analysis indicates a frcws-position of the two triphenylphosphine ligands. The reaction proceeds only in polar solvents like alcohols or dimethy...

The crystal structures of di-μ-chlorobis[2-(5-methyl-pyridin-2-yl-κN)phenyl-κC(1)] diplatinum(II) (1) and chloro(N,N-dimethylformamide-κO)[2-(5-methyl-pyridin-2-yl-κN)phenyl-κC(1)]platinum(II) (2) have been determined by means the X-ray diffraction. Both complexes cocrystallize in monoclinic space group C2/c with a = 39.5457(18) Å, b 7.2482(4) c 21.2269(10) Å β 121.460(2)°. asymmetric unit cons...

In this study, we examine macrocyclic compounds to determine whether they can provide a safer replacement and stable complex for BPA in thermochromic dyes. To achieve objective, series of compounds, Methyl-N-benzylhexahomotriazacalix[3]arene (MeAC3), p-Chloro-N-benzylhexahomo-triazacalix[3]arene (ClAC3), ?-Cyclodexdrin (?-CD), ?-Cyclodexdrin (?-CD), p-tert-Butylthiacalix[4]arene (TC4), Calix[4]...