5 research outputs found
Studies on excess molar volumes and viscosity deviations of binary mixtures of butylamine and N, N-dimethylformamide with some alkyl acetates at 298.15 K
1381-1389Densities and viscosities have been measured
for the binary mixtures of butylamine (BA) and N, N-dimethylformamide (DMF) with
methyl acetate (MA), ethyl acetate (EA), butyl acetate (BUA) and iso-amyl
acetate (AA) at 298.15 K over the entire composition range. From density and
viscosity data, the values of excess molar volume (VE) and
viscosity deviation (Δη) have been determined. These results have been fitted to
Redlich-Kister type polynomial equations to estimate the binary coefficients
and standard errors between the experimental and computed values. The density and
viscosity data have been analyzed in terms of semiempirical viscosity models and
the results have been discussed in terms of molecular interactions and structural
effects. The excess properties are found to be either negative or positive depending
on the molecular interactions and the nature of liquid mixtures
Synthesis, crystal structure, Hirshfeld surface, and DFT studies of a Copper(II) complex of 5,5′-dimethyl-2,2′-bipyridine and 1,2,2-trimethylcyclopentane-1,3-dicarboxylic acid
A new metal-organic hybrid complex [Cu(5,5′-dmbipy) (D-cam) (H2O)]n (1), (5,5′-dmbipy = 5,5′-dimethyl-2,2′-bipyridine, D-cam = D-camphoric acid anion) was hydrothermally synthesized. This complex was characterized by FTIR spectroscopy, TGA, and single-crystal X-ray diffraction. Crystallographic studies show that the title complex 1 crystallizes in an orthorhombic system with a P212121 space group with a = 06.9518(05) Ǻ, b = 13.5516(13) Ǻ, c = 22.6380(02)Ǻ; V = 2132.7(3) Ǻ3. The title CuII complex adopts a square pyramidal configuration. DFT study and Hirshfeld topology analysis of complex 1 was also done. The crystal achieves its three-dimensional structure and stability through polymeric chains having helical motifs of arrangement in between moieties and interconnected through hydrogen bonding interactions between the apical water molecule and non-coordinated oxygen atoms of the D-cam2- ligands. TGA, DFT calculations and Hirshfeld topology analysis revealed that the title complex 1 was stable