Q1. What are the contributions in this paper?
In this paper, Mahmood et al. reported the crystal structures of new 2D polymeric cadmium ( II ) complexes containing 1,3imidazolidine-2-thione ( Imt ) ligand.
2D polymeric cadmium(II) complexes containing 1,3-imidazolidine-2-thione (Imt) ligand, [Cd(Imt)(H2O)2(SO4)]n and [Cd(Imt)2(N3)2]n
TL;DR: In this paper, the structural investigation of two polymeric cadmium(II) complexes of imidazolidine-2-thione (Imt) based on sulfate or azide ions was carried out.
About: This article is published in Journal of Molecular Structure.The article was published on 2018-03-15 and is currently open access. It has received 9 citations till now. The article focuses on the topics: Octahedral molecular geometry & Coordination sphere.
Summary (1 min read)
1. Introduction
- Cadmium(II) is known to form a wide variety of 1:1 to 1:4 complexes with thiones (L), with the structural arrangements generally based on tetrahedl and octahedral coordination environments.
- (MeImt = N-methylimidazolidine-2-thione) usually exist in the polymeric form.
2. Experimental
- 1. Materials M AN US CR IP T AC CE PT ED 4 Cadmium sulfate (CdSO4 .8/3H2O) and NaN3 were obtained from Merck Chemical Company, Germany.
- Imidazolidine-2-thione was prepared according to the method reported in the literature [36].
- As a result, a white crystalline product was obtained, that was washed with methanol and dried.
- Crystal data and details of the data collection are summarized in Table 1.
3. Results and Discussion
- 1. X-ray Structure Studies Selected bond angles and distances are given in Table 1.
- The azide anion forms an end-to-end bridge between two cadmium ions resulting into a 2D network based on a 16-membered ring motif [CdN3]4 .
4. Conclusion
- The X-ray structures of the complexes show that both of them exist in the form of two dimensional polymers with each cadmium atom being octahedrally coordinated.
- The polymers are assembled through triplybridging sulfate and doubly-bridging, µ(1,3) azide ions in case of 1 and 2 respectively.
- Acknowledgement M AN US CR IP T AC CE PT ED 14 The Deanship of Scientific Research, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia is gratefully acknowledged for supporting this work through Project No. 2016/01/6822.
- Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK, e-mail: deposit@ccdc.cam.ac.uk or www.ccdc.cam.ac.uk.
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Figures (5)
Table 1. Crystal data and details of the structure refinement for compounds 1 and 2. 
Figure 6. View of the packing of the 2D networks in compound 2 in the form of a 3D network 
Table 2. Selected bond distances (Å) and bond angles (˚) for compounds 1 and 2 
Figure 4. ORTEP diagram of the molecular structure of compound 2 showing the atomic labeling scheme. Thermal ellipsoids have been drawn t 50% probability level. Symmetry codes: i = x, 1+y, z ; ii = -x+1/2, -y+3/2, 1-z ; iii = 1-x, y, -z+3/2 
Table 3 Hydrogen bond parameters in complexes 1 and 2 (Å, deg)a _______________________________________________________________________ D-H...A d(D-H) d(H...A) d(D...A) ∠(D-H-A) _______________________________________________________________________ (1)
Citations
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Abstract: A series of 1,3-disubstituted 4-benzylideneamino-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-ones (thioglycolurils) was synthesized via the reaction of 5,7-disubstituted 3-thioxoperhydroimidazo[4,5-e]-1,2,4-triazin-6-ones with hydroxy-, alkoxy-, and fluorocontaining benzaldehyde derivatives. An alkylation of the obtained thioglycolurils with methyl iodide or 4-bromobenzyl bromide provided the corresponding 6-benzylideneamino-5-alkylsulfanyl-3,3a,6,6a-tetrahydroimidazo[4,5-d]imidazol-2(1H)-ones. The fungicidal activity of some synthesized compounds against pathogens causing diseases of agricultural crops was studied.
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TL;DR: In this paper , the authors synthesized four new Au(I)-NHC complexes (1-4) by reacting (1,3-bis(2,6-di-isopropylphenyl)imidazol-2-ylidenegold(I)chloride) (Au(Ipr)Cl) with four different thiones, namely N-(i-propyl)IMidazolidine- 2-thione (i-PrImt), N-(dipropyl)-imidrazolidine (2-THione), 1, 3-Diazinane-2,Diaz, and 1,3 -Diazipane- 2 -thione(Diap), which showed moderate anticancer activities against selected cancer cell lines.
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References
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TL;DR: The title compound, {[Cd(NCS) 2(CH4N2S)2]·2H2O}n, forms a one-dimensional chain parallel to the a axis, caused by the presence of the bridging thiocyanate groups.
Abstract: The title compound, {[Cd(NCS)2(CH4N2S)2]·2H2O}n, forms a one-dimensional chain parallel to the a axis, caused by the presence of the bridging thiocyanate groups. Two solvent molecules per complex are present in the lattice. The CdII ion is situated on an inversion centre and is coordinated in a distorted octahedral fashion by two N and two S atoms from four thiocyanate ligands and by two S atoms from two thiourea molecules. Weak O—H⋯S, N—H⋯O and N—H⋯N interactions reinforce the structure.
3 citations
TL;DR: Cadmium(II) complexes, catena-poly[bis(thiocyanato-κN)bis(N-methylthiourea)cadmiam(II), [Cd(Metu)2(NCS)2]n (1) and dicyanidobis(n-methylTHiouera)cADmium (II), (2) were prepared and their structures were determined by single crystal X-ray analysis.
Abstract: Cadmium(II) complexes, catena-poly[bis(thiocyanato-κN)bis(N-methylthiourea)cadmium(II)], [Cd(Metu)2(NCS)2]n (1) and dicyanidobis(N-methylthiourea)cadmium(II), [Cd(Metu)2(CN)2] (2) were prepared and their structures were determined by single crystal X-ray analysis. In 1, the cadmium(II) ion is bound to four sulfur atoms of bridging Metu ligands and two nitrogen atoms of thiocyanate adopting a distorted octahedral environment. In 2, the geometry around cadmium is distorted tetrahedral attained by two cyanide ions and two methylthiourea molecules bound through the sulfur atoms. The crystal structures of both complexes show intra and intermolecular hydrogen bonding interactions. The complexes were also characterized by IR and NMR spectroscopy and the spectroscopic data were discussed in terms of the nature of bonding.
3 citations
TL;DR: Three cadmium(II) complexes of 1,3-diazinane-2-thione (diaz); dichloridotetrakis(1,3diaz-inane)-2,thione)cadmium (II), [Cd(diaz)2(N3)2]n (3) were prepared and their crystal structures were determined by X-ray crystallography as discussed by the authors, and they were also characterized by IR and NMR spectroscopy, and the spectroscopic data indicated the coordination of lig
2 citations
01 Jan 1960
TL;DR: In this paper, a two-dimensional Patterson and Fourier synthesis was carried out with generalized projections of partial differences and back-shift corrections, and the structure has been solved by two dimensional Patterson-and Fourier syntheses.
Abstract: bis-Ethylenethiourea-cadmium thiocyanate crystallizes in the monoclinic system and is isostructural with the corresponding lead compound. The cell dimensions are: a=15.60±0.04, b=8.17±0-02, c=ll.51_0.01A; fl=95°41'; the number of formula units per unit cell is 4 and the space group is C~h-C 2/c. The structure has been solved by two-dimensional Patterson and Fourier syntheses, and refinement has been carried out with generalized projections of partial differences and back-shift corrections. The cadmium atom coordinates octahedrally with two sulphur atoms attached to ethylenethiourea molecules, and with two sulphur and two nitrogen atoms in four different NCS groups. The coordination polyhedra are therefore linked in chains by these NCS groups, which form bridges between cadmium atoms.
1 citations