Yu. E. Gorbunova

Insertion of Ethyl Isocyanate at the Tungsten–Chlorine Bond. Crystal Structure of 1,3,5-Triethyl-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione

The reaction of tungsten hexachloride with excess ethyl isocyanate in dichloroethane leads to the insertion of three ligand molecules at one of the tungsten–chlorine bonds. The data of elemental analysis and IR spectroscopy confirm that the thermolysis of the reaction mixture affords the WCl4(L3Cl) complex (I), where L = –N(Et)C(O)–. The structure of the chain of inserted molecules in I is established on the basis of IR and NMR data, and the results of X-ray diffraction analysis of crystals of an organic product (II) of the hydrolysis of I. According to the latter, compound (II) is a derivative of s-triazine—1,3,5-triethyl-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione.

Uranyl complexes with acetophenone oxime

The interaction of uranyl compounds with acetophenone oxime has been studied. Mixed-ligand uranyl acetophenone oximates have been synthesized. X-ray crystallography shows that, in single crystals of [UO2(C8H8NO)2{(CH3)2SO}2] and [UO2(C8H8NO)(NO3){(CH3)2SO}2], acetophenone oxime is coordinated to uranyl as a bidentate chelating ligand.

Influence of synthesis conditions on the properties of 2-pyrimidinecarbonitrile in complexing reactions: Synthesis and structure of the coordination polymer [Ag(C4H3N2CN)NO3] and mononuclear complex [Ag(C4H3N2COOH)2]NO3·H2O

AbstractThe coordination polymer [Ag(C4H3N2CN)NO3] (I) and mononuclear complex [Ag(C4H3N2COOH)2]NO3 · H2O (II) have been synthesized and characterized by X-ray crystallography. The crystals of I are monoclinic, space group Pm, a = 5.364(1) Å, b = 6.631(1) Å, c = 5.648(1) Å, β = 105.68(3)°, V = 193.42(6) Å3, dcalcd = 2.361 g/cm3, Z = 1. The crystals II are triclinic, space group

3D Supramolecular structure of the coordination polymer [Ag(2-MePyz)ReO4]

P\bar 1

Crystal Structure of Rb[UO2(SO4)F]

, a = 6.859(1) Å, b = 8.872(2) Å, c = 12.825(3) Å, α = 81.29(3)°, β = 86.33(3)°, γ = 69.66(3)°, V = 723.3(3) Å3, dcalcd = 2.002 g/cm3, Z = 2. The structure of I is built of polymeric chains [Ag(C4H3N2CN)]∞+ linked through coordinated anions NO3− into layers (a 2D polymer) perpendicular to the [001] direction. The formation of II is a result of hydrolysis of the carbonitrile group to the carboxyl group (in the presence of metal ions in the solution) and coordination of the ligand to the metal. In II, mononuclear cationic complexes [Ag(N2H3C5OOH)2]+ are linked through H-bonds into supramolecular chains along direction [010]. Hydrogen bonds are also formed between free NO3− anions and water molecules.

Synthesis, 19F, 125Te NMR spectra and crystal structure of NBu4TeF5 and NH4TeF5 (NH4F)0.25 ('(NH4)2TeF6')

Metal complex [AgL] (I) is synthesized by the reaction of AgNO3 with 3-(5-furyl-1,3,4-oxadiazol-2-yl)acrylic acid (HL, C9H6N2O4), and its crystal structure is determined (CIF file CCDC no. 1426528). The crystals are monoclinic, space group P21/n, a = 4.946(1), b = 20.084(1), c = 9.015(1) Å, β = 92.32(1)°, V = 894.482 Å3, ρcalcd = 2.442 g/cm3, Z = 4. In structure I, pairs of centrosymmetric silver atoms are bound by bidentate-bridging oxygen atoms of two anions L into dimeric blocks. The Ag–Ag distance in the dimer is 2.854(1) Å. The coordination sphere of Ag+ contains two oxygen atoms, one silver atom, and one nitrogen atom of the diazolyl fragment of the adjacent anion. The coordination polyhedron of Ag+ is a strongly distorted tetrahedron. The molecular packing of crystal I is built of infinite ribbons (AgL)n extended along the direction [001]. The photoluminescence spectrum of compound I contains intense bands about 550 nm corresponding to the green spectral range and less intense bands at 425 and 485 nm.

Coordination molecular compounds of cadmium(II) iodide with dimethylpyridines

The complex [Ag(2-MePyz)ReO4] (I) is synthesized, and its structure is determined. The crystals are monoclinic, space group P 21/c, a = 7.234(1), b = 15.451(1), c = 8.036(3) Å, β = 92.56(1)°, V = 897.3(2) Å3, ρcalcd = 3.347 g/cm3, Z = 4. Structure I consists of cationic polymer chains [Ag(2-MePyz)]∞+. Anions ReO4− are weakly bound to Ag+ (Ag...Oaverage 2.693 Å) and join the latter into a supramolecular framework. The Ag+ ion has a linear coordination (NAgN 177.9(2)°, distances Ag-N 2.223(5) and 2.242(5) Å).

Crystal Structures of Ammonium and Cesium Pentadecafluorotetraantimonates(III)

Chemistry of coordination polymers and metal-supramolecular ensembles attracts attention due to their structural diversity and potential physical and chemical properties. In this article, the works on the synthesis and structure of coordination polymers of silver published by the authors and coworkers are briefly reviewed and compared with literature data on the structure of coordination polymers of silver published in the recent five years.