Crystal structure of a silver(I) complex {[Ag(N-methylthiourea)2]NO3}n exhibiting infinite chains of AgS4 tetrahedra |
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| Authors: | H Ur Rehman S Ahmad H Ajaz M Hanif M Altaf and H Stoeckli-Evans |
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| Institution: | (1) Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan;(2) Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan;(3) Department of Chemistry, University of Engineering and Technology, Lahore, 54890, Pakistan;(4) Department of Chemistry, Government College Asghar Mall, Rawalpindi, Pakistan; |
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| Abstract: | A polymeric silver(I) complex, bis(N-methylthiourea)silver(I) nitrate, {Ag(Metu)2]NO3}
n
is prepared and its crystal structure is determined. The compound crystallizes in the monoclinic C2/c space group. In the structure, distorted AgS4 tetrahedra are linked through the sulfur atoms of the Metu ligand to form isolated infinite chains of the type Ag(SR)2]
n
n+. The cationic chains are separated from each other by nitrate ions that do not coordinate to the metal ion. The chains are
bridged via N-H...O hydrogen bonds involving the nitrate ions. The complex exhibits an Ag—Ag separation of ∼3.21 ? indicating
the existence of significant argentophilic interactions. An upfield shift in the >C=S resonance of Metu in 13C NMR and downfield shift in the N-H resonance in 1H NMR are consistent with sulfur coordination to silver(I). |
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