Ara
Toplam kayıt 426, listelenen: 321-330
Structural characteristics of organo-modified bentonites of different origin
(Springer, 2007)
Organobentonites were synthesized by treating Na-bentonites (Wyoming and Reşadiye) with cetylpyridinium chloride (CPC) using ion exchange method. The difference in the basal spacing by 0.65 Å and a higher mass loss by ...
Determination of the protonation constants of some 4-(substituted benzylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones by the potentiometric method in ethanol-water mixtures
(2007)
To gain more information about the effect of solvent on 4,5-dihydro-1H-1,2,4-triazol-5-ones, the stoichiometric protonation constants of thirteen triazoles in ethanol-water mixtures were determined at an ionic strength of ...
4-Amino-3,5-diethyl-4H-1,2,4-triazole at 100 K: Chains of edge-fused R 44(10) and R44(20) rings
(Wiley, 2007)
The title compound, C6H12N4, has four crystallographically independent mol-ecules in the asymmetric unit. Inter-molecular N - H?N hydrogen bonds involving amino groups and triazole N atoms form a three-dimensional framework ...
2'-[Eth-oxy(p-tol-yl)methyl-ene]acetohydrazide
(2007)
Mol-ecules of the title compound, C12H16N2O2, are linked by N - H?O hydrogen bonds [N?O = 2.971 (2) Å, H?O = 2.17 (2) Å and N - H?O = 162 (2)°] into cyclic centrosymmetric R 2 2(8) dimers. © International Union of ...
2'-[Eth-oxy(phen-yl)methyl-ene]acetohydrazide
(2007)
The title compound, C11H14N2O2, contains two independent mol-ecules in the asymmetric unit. Each independent mol-ecule exists as part of an N - H?O hydrogen-bonded centrosymmetric dimer. © International Union of Crystallography ...
4-(4-Allyl-2-meth-oxyphen-oxy)benzene-1,2-dicarbonitrile
(Wiley, 2007)
In the title compound, C18H14N2O2, the dihedral angle between the two benzene rings is 88.6 (1)°. The allyl group is disordered over two orientations, with refined occupancies of 0.695 (6) and 0.305 (6). The meth-oxy group ...
5,5-Diethylbarbiturate complexes of silver with 2,2′-bipyridine and 3-(2-pyridyl)propanol: Syntheses, crystal structures, spectroscopic, thermal and antimicrobial activity studies
(Verlag der Zeitschrift fur Naturforschung, 2008)
Two silver 5,5-diethylbarbiturate (barb) complexes with 2,2?-bipyridine (bpy) and 3-(2-pyridyl) propanol (pypr), [Ag(barb)(bpy)] (1) and [Ag(barb)(pypr)] (2), have been prepared and characterized by elemental analysis, IR ...
Synthesis and anticancer evaluation of some new 4-amino-3-(p-methoxybenzyl) -4,5-dihydro-1,2,4-triazole-5-one derivatives
(Verlag der Zeitschrift fur Naturforschung, 2008)
4-Amino-3-p-methoxybenzyl-5-oxo-4,5-dihydro-1,2,4-triazol-1-yl-acetic acid ethyl ester (2) was prepared from 4-amino-4,5-dihydro-1H-1,2,4-triazole-5-one (1) and ethyl bromoacetate. Compound 3 was synthesized by the ...
Synthesis, potentiometric titrations and antioxidant activities of some 4-acylamino-4,5-dihydro-1H-1,2,4-triazol-5-one derivatives
(2008)
Five novel 3-alkyl-4-cinnamoylamino-4,5-dihydro-1H-1,2,4-triazol-5-ones (2) were synthesized by the reactions of 3-alkyl-4-amino-4,5-dihydro-1H-1,2,4- triazol-5-ones (1) with cinnamoyl chloride and characterized by elemental ...
The microwave-assisted synthesis and characterization of novel polymeric phthalocyanines containing resorcinarene
(Elsevier, 2008)
Novel metal phthalocyanine (Cu, Zn, Co, Ni) polymers containing resorcinarene moieties were prepared; the resorcinarene was obtained by the acid-catalysed cyclocondensation of resorcinol and acetaldehyde under microwave ...