Silver (I) complexes of 6-methyl-2-pyridinecarboxylic acid: the crystal structure of [Ag (MeC5H3NCOO)(MeC5H3NCOOH)] (original) (raw)
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European Journal of Chemistry, 2021
The synthesis and characterization of an imino-pyridyl ligand N,N'-(butane-1,4-diyl)bis(1-(pyridin-2-yl)methanimine) (L) and its Ag(I)ClO4 complex (I) by various spectroscopic techniques and elemental analyses is presented in this study. X-ray single crystal structure of complex I revealed that in complex I, each Ag(I) ion is tetra coordinated with two pyridine N-atoms and two imine N-atoms of the ligand L, forming a macrocyclic dimeric Ag(I) grid. In the macrocyclic dimer complex I, Ag-Ag separation along the chain is 5.318 Å. The Ag-Npy average distance is 2.396 Å and that of the Ag-Nim is 2.257 Å. The macrocyclic dimer complex I is supramolecularly arranged by π-stacking interactions. Computational, Hirshfeld surface analysis and photophysical studies on ligand L and complex I have also been performed. Crystal data for C32H36Ag2Cl2N8O8 (M =947.33 g/mol): Triclinic, space group P-1 (no. 2), a = 9.1714(12) Å, b = 10.4373(14) Å, c = 10.8297(14) Å, α = 112.317(3)°, β = 91.391(3)°, γ = 92.353(3)°, V = 957.3(2) Å 3 , Z = 1, T = 293.15 K, μ(MoKα) = 1.220 mm-1 , Dcalc = 1.643 g/cm 3 , 10248 reflections measured (4.07° ≤ 2Θ ≤ 53.098°), 3966 unique (Rint = 0.0280, Rsigma = 0.0331) which were used in all calculations. The final R1 was 0.0722 (I > 2σ(I)) and wR2 was 0.2229 (all data). DFT Ag(I) dimer Photophysics Imino-pyridyl ligand X-ray crystal structure Hirshfeld surface studies
Polyhedron, 1998
The coordination of silver(I) acetate with 2,2' : 6',2"-terpyridine (tpy) and 6,6"-diphenyl-2,2' : 6',2"terpyridine (dptpy) has been investigated. In contrast to the behaviour with copper(I), no dinuclear doublehelical species have been unambiguously isolated although there is evidence that double-helical [Ag2L2] 2÷ complexes exist in weakly-coordinating solvents. In the case of 2,2' : 6',2"-terpyridine, a species containing a square-planar [Ag(tpy)(MeCN)] ÷ caton has been isolated and structurally characterised whilst with 6,6"diphenyl-2,2' : 6',2"-terpyridine a related but very distorted [Ag(dptpy)(MeCN)] ÷ species has been structurally characterised.
Structure of [2-(aminomethyl)pyridine]silver(I) nitrate and EPR studies of its oxidation product
Polyhedron, 1997
Reaction of AgNO 3 with excess 2-(aminomethyl)pyridine (amp) in water led to the crystallization of Ag(amp)NO3 (1). Nearly linear coordination of silver(I) by pyridine-N and amino-N from two different amp molecules results in a polymeric chain structure of 1. The packing is stabilized by ring-ring stacking interactions between two inversion-related polymer chains. Oxidation of 1 with (NHa)2S208 resulted in an orange solution from which a magnetically dilute Ag n complex was crystallized by the addition of NH4PF6. It gave a well-resolved EPR spectrum and is formulated as silver(II) picolinate co-crystallized with NH4PF6.
Inorganica Chimica Acta, 2008
The reaction of [Ag 4 (hfac) 4 (THF) 2 ] (hfac À = 1,1,1,5,5,5-hexafluoroacetylacetonate, THF = tetrahydrofurrane) with 2,2 0-bipyrimidine (bpm) leads to single crystals. They crystallise in the triclinic system, space group P 1. Their structure consists of [Ag 4 (hfac) 4 (l 2-bpm) 3 ] tetranuclear complexes. In this complex, Ag(I) ions adopt distorted square planar and trigonal prismatic geometries. When [Ag 4 (hfac) 4 (THF) 2 ] is replaced by monohydrated silver(I) perchlorate, a one-dimensional (1D) compound with a formula of [[Ag(l 2-bpm)] + ] n , nClO 4 À is obtained as single crystals. They crystallise in the monoclinic system, space group P2 1 /c. Their structure consists of [[Ag(l 2bpm)] + ] n chains separated by non-coordinated perchlorate ions. In the chains, the Ag(I) centres adopt a square planar geometry. Finally, starting from [[Ag(l 2-bpm)] + ] n , nClO 4 À and sodium oxalate ðNa 2 ox; ox ¼ C 2 O 2À 4 Þ, another 1D compound with a formula of [Ag(l 2bpm)(l 2-ox)] n , 4nH 2 O is obtained as single crystals. They crystallise in the triclinic system, space group P 1. In these chains, bipyrimidine and oxalate are alternate. They generate a square planar geometry around the Ag(I) cations.
Inorganic Chemistry Communications, 2008
Two new silver(I)-saccharinato (sac) complexes [Ag 4 (sac) 4 (mpyz) 2 (H 2 O) 2 ] (1), and [Ag 2 (sac) 2 (pyzca) 2 ] (2), (mpyz = 2-methylpyrazine, pyzca = pyrazine-2-carboxamide) have been synthesized and structurally characterized. Bridging of silver(I) centers by sac ligands results in argentophilic contacts of 3.192(1) Å for 1, and 3.168(2) Å for 2. These AgÁ Á ÁAg interactions were discussed in terms of bond distances and angles around the silver(I) ion. Both complexes exhibit strong blue luminescence at room temperature in the solid state.
Inorganica Chimica Acta, 1996
Three ionic complexes, [Ag(Hmimt)](NO3), [Ag(Hmimt)2](NO3) and [Ag(Hmimt)3](NO3) (Hmimt=l-methyl-2(3H)imidazolinethione), were synthesized by reacting AgNO a with Hmimt and characterized spectroscopically (mass, IR and 1H, 13C, ~SN and t°gAg NMR). The structure of [Ag(Hmimt)3] (NO3) was determined by X-ray crystallography. In this compound, which crystallizes in the monoclinic system (space group P2~/n; a=7.621(2), b=27.281 , c= 10.256(4) A,/3= 107.89(1)*; Z=4) the Ag+,ion is trigonally coordinated in the [Ag(Hmimt)3] + cation, with a mean Ag-S distance of 2.489 A. The shortest Ag.-.O distance is 2.929 A, and the crystal lattice features an extensive network of hydrogen bonds.