0000000000117447
AUTHOR
Karolina Jasiak
Preparation and molecular structures of N′-(2-heteroarylmethylidene)-3-(3-pyridyl)acrylohydrazides
Abstract The crystal and molecular structures of N′-(2-furylmethylidene)-3-(3-pyridyl)acrylohydrazide and N′-(2-thienylmethylidene)-3-(3-pyridyl)acrylohydrazide are reported, and the influence of the type of the heteroatom on the aromaticity of the aromatic rings is discussed. Both molecules are nearly planar. The geometry of the acrylohydrazide arrangement is comparable to that of homologous compounds. Density functional theory (DFT) calculations were performed in order to analyze the changes in the geometry of the studied compounds in the crystalline state and for the isolated molecule. The most significant changes were observed in the values of the N–N and C–N bond lengths. The harmonic …
Study on the synthesis of novel 5-substituted 2-[2-(pyridyl)ethenyl]-1,3,4-oxadiazoles and their acid–base interactions
Abstract A series of novel 5-substituted 2-[2-(pyridyl)ethenyl]-1,3,4-oxadiazoles were efficiently synthesized by cyclocondensation of the appropriate 3-(pyridyl)acrylohydrazides with triethyl orthoesters in the presence of glacial acetic acid. The products were identified by means of spectroscopic methods and their pKA ionization constants were determined. The influence of substituents on the basicity of the pyridine system has been discussed. Graphical Abstract
CCDC 1533753: Experimental Crystal Structure Determination
Related Article: Karolina Jasiak, Agnieszka Kudelko, Katarzyna Gajda, Błażej Dziuk, Bartosz Zarychta, Krzysztof Ejsmont|2018|Z.Naturforsch.,B:Chem.Sci.|73|725|doi:10.1515/znb-2018-0132
CCDC 994076: Experimental Crystal Structure Determination
Related Article: Agnieszka Kudelko, Karolina Jasiak, Krzysztof Ejsmont|2015|Monatsh.Chem.|146|303|doi:10.1007/s00706-014-1355-x
CCDC 994077: Experimental Crystal Structure Determination
Related Article: Agnieszka Kudelko, Karolina Jasiak, Krzysztof Ejsmont|2015|Monatsh.Chem.|146|303|doi:10.1007/s00706-014-1355-x
CCDC 1533752: Experimental Crystal Structure Determination
Related Article: Karolina Jasiak, Agnieszka Kudelko, Katarzyna Gajda, Błażej Dziuk, Bartosz Zarychta, Krzysztof Ejsmont|2018|Z.Naturforsch.,B:Chem.Sci.|73|725|doi:10.1515/znb-2018-0132