57 research outputs found
Crystal structures of (2,2′-bipyridyl-κ2N,N′)bis[N,N-bis(2-hydroxyethyl)dithiocarbamato-κ2S,S′]zinc dihydrate and (2,2′-bipyridyl-κ2N,N′)bis[N-(2-hydroxyethyl)-N-isopropyldithiocarbamato-κ2S,S′]zinc
The common feature of the title compounds, [Zn(C5H10NO2S2)2(C10H8N2)]·2H2O, (I), and [Zn(C6H12NOS2)2(C10H8N2)], (II), is the location of the ZnII atoms on a twofold rotation axis. Further, each ZnII atom is chelated by two symmetry-equivalent and symmetrically coordinating dithiocarbamate ligands and a 2,2′-bipyridine ligand. The resulting N2S4 coordination geometry is based on a highly distorted octahedron in each case. In the molecular packing of (I), supramolecular ladders mediated by O—H...O hydrogen bonding are found whereby the uprights are defined by {...HO(water)...HO(hydroxy)...}n chains parallel to the a axis and with the rungs defined by `Zn[S2CN(CH2CH2)2]2'. The water molecules connect the ladders into a supramolecular layer parallel to the ab plane via water-O—H...S and pyridyl-C—H...O(water) interactions, with the connections between layers being of the type pyridyl-C—H...S. In (II), supramolecular layers parallel to the ab plane are sustained by hydroxy-O—H...S hydrogen bonds with connections between layers being of the type pyridyl-C—H...S
Bis[N′-(2-oxo-1H-indol-3-ylidene)furan-2-carbohydrazidato-κ3 O,N′,O′]manganese(II) N,N-dimethylformide monosolvate monohydrate
In the title compound, [Mn(C13H8N3O3)2]·C3H7NO·H2O, the metal atom is O,N,O′-chelated by two deprotonated Schiff bases and exists in a distorted octahedral geometry. The N–H groups, the carbonyl group of the DMF molecule and the uncoordinated water molecule engage in N—H⋯O and O—H⋯O hydrogen-bonding interactions, generating a hydrogen-bonded ribbon that propagates along [110]
Bis[N′-(2-oxo-1H-indol-3-ylidene)thiophene-2-carbohydrazidato-κ3 O,N′,O′]zinc(II) N,N-dimethylformide monosolvate monohydrate
The metal atom of the title compound, [Zn(C13H8N3O2S)2]·C3H7NO·H2O, is O,N,O′-chelated by two deprotonated Schiff bases and it exists in a distorted octahedral geometry. The N–H groups of the ligands, the carbonyl group of the DMF molecule and uncoordinated water molecule engage in N—H⋯O and O—H⋯O interactions, generating a hydrogen-bonded ribbon that propagates along [110]. One thienyl ring is disordered over two positions in a 1:1 ratio
The hybrid of waqf land and zakat fund development: a case study for protecting asnaf fisabilillah well-being / Siti Nadiah Mohd Ali, Salbiah Mokhtar and Abdul Halim Mohd Noor
This research purpose is to explore the hybrid of Waqf land and zakat fund in the development of asnaf fisabilillah needs. Due to the current situation, asnaf fisabilillah in the context of zakat division in modern time interpretation can be used to design socioeconomic development and to uphold the symbolism of Islam. The significant value of understanding this issue will undergo qualitative research based on a paradigm of strategic management theories to suit the internal and the external needs of Pahang SIRC. Using purposive sampling, Pahang SIRC has been chosen to be part of the study where rich data got from the semi-structured interview with three officers. The data were taped, transcribed and analyzed using coding analysis for multiple interviews. Our results inform that, from Pahang SIRC officer’s perspective, there is a need in the hybrid between Waqf land and zakat fund to the well-being of asnaf fisabilillah. The officers are more worried about the benefits of interest they give to the asnaf fisabilillah are insufficient, so that the collection of zakat fund needs to be in the "house." The finding shows that Pahang SIRC has two projects that involved asnaf fisabilillah in the combination of Waqf land and zakat fund. In summary, this study provides some discussion of the single case study which represents a hybrid of Waqf land, and zakat is a comprehensive collaboration within SIRC unit in their operation. The awareness of the knowledge of Waqf land and zakat from the shariah and management principles give a broader perspective to the professionals in Pahang SIRC to contribute to the target group
3-(2-Hydroxyethyl)-3-methyl-1-(4-methylbenzoyl)thiourea
The title thiourea derivative, C12H16N2O2S, has a twisted conformation with the dihedral angle between the NC(=S)N and O=CC6 planes being 35.45 (5)°. The observed conformation allows for an intramolecular N-H...O hydrogen bond. In the molecular packing, supramolecular aggregation is based on hydroxy-O-H...O(carbonyl) hydrogen bonding and leads to supramolecular helical chains along the a axis; chains are reinforced by N-methylene-C-H...S and N-methyl-C-H...[pi](arene) interactions. Supramolecular layers in the ab plane are formed as a result of tolyl-methyl-C-H...[pi](arene) interactions
Exploring the crystallization landscape of cadmium bis(N-hydroxyethyl, N-isopropyldithiocarbamate), Cd[S2CN(iPr)CH2CH2OH]2
Crystallization of Cd[S2CN(iPr)CH2CH2OH]2 from
ethanol yields the coordination polymer [{Cd[S2CN(iPr)
CH2CH2OH]2}·EtOH]∞ (1) within 3 h. When the solution is
allowed to stand for another hour, the needles begin to
dissolve and prisms emerge of the supramolecular isomer
(SI), binuclear {Cd[S2CN(iPr)CH2CH2OH]2}2·2EtOH (2).
These have been fully characterized spectroscopically
and by X-ray crystallography. Polymeric 1 has 2-fold symmetry
and features dithiocarbamate ligands coordinating
two octahedral Cd atoms in a μ2κ2-tridentate mode.
Binuclear 2 is centrosymmetric with two ligands being
μ2κ2-tridentate as for 1 but the other two being κ2-chelating
leading to square pyramidal geometries. The conversion
of the kinetic crystallization product, 1, to thermodynamic
2 is irreversible but transformations mediated by recrystallization
(ethanol and acetonitrile) to related literature
SI species, namely coordination polymer [{Cd[S2CN(iPr)
CH2CH2OH]2}3·MeCN]∞ and binuclear {Cd[S2CN(iPr)CH2CH
2
OH]2}2·2H2O·2MeCN, are demonstrated, some of which
are reversible. Three other crystallization outcomes are
described whereby crystal structures were obtained for
the 1:2 co-crystal {Cd[S2CN(iPr)CH2CH2OH]2}2:2[3-(propan-
2-yl)-1,3-oxazolidine-2-thione] (3), the salt co-crystal [iPr
NH2(CH2CH2OH)]4[SO4]2{Cd[S2CN(iPr)CH2CH2OH]2}2 (4) and
the salt [iPrNH2(CH2CH2OH)]{Cd[S2CN(iPr)CH2CH2OH]3} (5).
These arise as a result of decomposition/oxidation of the
dithiocarbamate ligands. In each of 3 and 4 the binuclear
{Cd[S2CN(iPr)CH2CH2OH]2}2 SI, as in 2, is observed strongly
suggesting a thermodynamic preference for this form
An efficient synthetic route, characterization and antimicrobial evaluation of Co(II), Ni(II), Cu(II) and Zn(II) Schiff base complexes
ABSTRACT. The synthesis of Schiff base compound derived from 2-hydroxy-3-methoxybenzaldehyde and o-phenylenediamine via solvent-assisted mechanochemical synthesis in the presence of a small amount of dimethylformamide as liquid-assisted solvent was reported. The Co(II), Ni(II), Cu(II) and Zn(II) Schiff base complexes were synthesized and characterized by powder x-ray diffraction, infra-red spectroscopy, differential scanning colorimetry, thermogrametric analysis, energy dispersive X-ray analysis and CHNS/O macro-analysis. According to infrared spectral analysis, a strong band in the spectra of Schiff base at 1617 cm-1 was assigned to the azomethine v(C=N) stretching vibration. In the complexes, it shifted to lower frequency regions, indicating the formation of desired compounds. The DSC thermogram of Schiff base showed a single sharp peak at 158 oC, which is attributed to the melting or the phase transition. As revealed by TGA, the complexes were obtained as solid compounds containing some amounts of water molecules. The powder-XRD analysis showed that the patterns of the synthesized compounds were different from the starting materials, indicating that the starting constituents were changed into product. The antimicrobial activity results for selected bacteria and fungi revealed that complexes have higher activity than the Schiff base. Furthermore, the synthesized compounds were found to be more effective against fungal isolates than those of bacteria.
KEY WORDS: Schiff base, Solvent-assisted mechanochemistry, Azomethine, Complexes
Bull. Chem. Soc. Ethiop. 2022, 36(4), 801-813.
DOI: https://dx.doi.org/10.4314/bcse.v36i4.7  
Bis[N-(2-hydroxyethyl)-N-isopropyldithiocarbamato-κ2S,S′](piperazine-κN)cadmium: crystal structure and Hirshfeld surface analysis
The title compound, [Cd(C6H12NOS2)2(C4H10N2)], features a distorted square-pyramidal coordination geometry about the central CdII atom. The dithiocarbamate ligands are chelating, forming similar Cd—S bond lengths and define the approximate basal plane. One of the N atoms of the piperazine molecule, which adopts a chair conformation, occupies the apical site. In the crystal, supramolecular layers propagating in the ac plane are formed via hydroxy-O—H...O(hydroxy), hydroxy-O—H...N(terminal-piperazine) and coordinated-piperazine-N—H...O(hydroxy) hydrogen bonds; the layers also feature methine-C—H...S interactions and S...S [3.3714 (10) Å] short contacts. The layers stack along the b-axis direction with very weak terminal-piperazine-N—H...O(hydroxy) interactions between them. An evaluation of the Hirshfeld surfaces confirms the importance of intermolecular interactions involving oxygen and sulfur atoms
2-({[(Pyridin-1-ium-2-ylmethyl)carbamoyl]formamido}methyl)pyridin-1-ium bis(3,5-dicarboxybenzoate): crystal structure and Hirshfeld surface analysis
The asymmetric unit of the title salt, C14H16N4O22+·2C9H5O6−, comprises half a dication, being located about a centre of inversion, and one anion, in a general position. The central C4N2O2 group of atoms in the dication are almost planar (r.m.s. deviation = 0.009 Å), and the carbonyl groups lie in an anti disposition to enable the formation of intramolecular amide-N—H...O(carbonyl) hydrogen bonds. To a first approximation, the pyridinium and amide N atoms lie to the same side of the molecule [Npy—C—C—Namide torsion angle = 34.8 (2)°], and the anti pyridinium rings are approximately perpendicular to the central part of the molecule [dihedral angle = 68.21 (8)°]. In the anion, one carboxylate group is almost coplanar with the ring to which it is connected [Cben—Cben—Cq—O torsion angle = 2.0 (3)°], whereas the other carboxylate and carboxylic acid groups are twisted out of the plane [torsion angles = 16.4 (3) and 15.3 (3)°, respectively]. In the crystal, anions assemble into layers parallel to (10-4) via hydroxy-O—H...O(carbonyl) and charge-assisted hydroxy-O—H...O(carboxylate) hydrogen bonds. The dications are linked into supramolecular tapes by amide-N—H...O(amide) hydrogen bonds, and thread through the voids in the anionic layers, being connected by charge-assisted pyridinium-N—O(carboxylate) hydrogen bonds, so that a three-dimensional architecture ensues. An analysis of the Hirshfeld surface points to the importance of O—H...O hydrogen bonding in the crystal structure
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