Synthesis and Crystal Structure of Ethylenediammonium bis iodate tetra iodic Acid: [C<Subscript>2</Subscript>H<Subscript>10</Subscript>N<Subscript>2</Subscript>] (IO<Subscript>3</Subscript>)<Subscript>2</Subscript>·4HIO<Subscript>3</Subscript>

Abstract  

The synthesis and crystal structure are presented for the ethylenediammonium bis iodate tetra iodic acid. An X-ray investigation has shown that this compound crystallizes in a centrosymmetric monoclinic system, space group P2₁/c with the lattice parameters: a = 7.2536(2) ?, b = 18.5351(5) ?, c = 7.5685(2) ?, β = 107.937(1)°, V = 968.10(3) ?³. The structure was solved from 5281 independent reflections with R ₁ = 0.0229 and wR ₂ = 0.0428, and refined with 156 parameters. The structure is built up of [(CH₂)₂(NH₃)₂]²⁺ cations connected to the one-dimensional [HIO₃]_n chains and to the [H₂I₄O₁₂]²⁻ clusters by a weak N–H···O hydrogen bonds.     

Synthesis and Crystal Structure of the Heteronuclear Decavanadates Complex: [Fe(phen)<Subscript>3</Subscript>]<Subscript>2</Subscript>·[V<Subscript>10</Subscript>O<Subscript>28</Subscript>]·15H<Subscript>2</Subscript>O

Abstract  

A new decavanadate metal complex [Fe(phen)₃]₂·[V₁₀O₂₈]·15H₂O (phen = 1,10-phenanthroline) has been synthesized from a hydrothermal reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The crystal structure analysis reveals that the polyoxoanions are decorated with the [Fe(phen)₃]³⁺ cations, and that the water molecules play the bridge role on the packing modes. They are further contacted to form supramolecular networks through extensive hydrogen bonding.     

Synthesis and Crystal Structure of a New Ion-Pair Complex Based on [Ni(tdas)<Subscript>2</Subscript>]<Superscript>2−</Superscript> Anion and Triphenylphosphinium Cation

Abstract  A new ion-pair complex, bis(1-benzyltriphenylphosphinium) bis(1,2,5-thiadiazole-3,4-dithiolato)nickelate(II), [BzTPP]₂[Ni(tdas)₂](1), has been prepared and characterized by elemental analyses, UV, IR, MS spectrum, molar conductivity and single crystal X-ray diffraction. The title complex crystallizes in the triclinic space group P-1, a = 9.098(1) Å, b = 9.666(1) Å, c = 29.573(3) Å, α = 83.81(1)°, β = 81.97(1)°, γ = 78.83(1)°, V = 2,517.5(4) ų, Z = 2. The unit cell contains two [BzTPP]⁺ and two halves of [Ni(tdas)₂]²⁻ anions in which the anion exhibits a quasi-planar structure. The [BzTPP]⁺ cation adopts a conformation where four phenyl rings are twisted to the C–C–P reference plane. The weak cation–cation C–H···π, π···π interactions and anion–cation C–H···N hydrogen bonds between the anion and cation play an important role in the stacking and stabilizing of the title complex. Graphical Abstract  The title new ion-pair complex, bis(1-benzyltriphenylphosphinium) bis(1,2,5-thiadiazole-3,4-dithiolato)nickelate(II), [BzTPP]₂[Ni(tdas)₂](1), contains two [BzTPP]⁺ and two halves of [Ni(tdas)₂]²⁻ anions in which the weak cation–cation C–H···π, π···π interactions and anion−cation C–H···N hydrogen bonds between the anion and cation play an important role in the stacking and stabilizing of the title complex.      

Synthesis,Crystal Structure and Spectral Properties of [Fe<Subscript>3</Subscript>(2,2′-bipy)<Subscript>6</Subscript>(ox)<Subscript>3</Subscript>]·12.25H<Subscript>2</Subscript>O Complex

A novel iron (II) complex of formula [Fe₃(2,2′-bipy)₆(ox)₃]·12.25H₂O (2,2′-bipy = 2,2′-bipyridine, ox = oxalate) has been prepared and structurally characterized by X-ray crystallography. In the complex, the metal atoms are six-coordinated in distorted octahedral environment. In the complex [Fe(ox)₃]^4? anions and water molecules are linked together into 1D chain structure by hydrogen interaction. The red crystal of the complex is monoclinic, space group P2₁/c, with a = 22.932(6) Å, b = 13.715(4) Å, c = 22.493(6) Å, β = 93.177(5)°, and V = 7063(3) Å³ with Z = 4.     

Crystal structure and properties of [OsO<Subscript>2</Subscript>(NH<Subscript>3</Subscript>)<Subscript>4</Subscript>]SO<Subscript>4</Subscript> · H<Subscript>2</Subscript>O

The structure of a single crystal of tetraammindioxoosmium(VI) sulfate [OsO₂(NH₃)₄]SO₄ · H₂O, which is synthesized by the reaction of K₂[OsO₂(OH)₄] with (NH₄)₂SO₄ in an aqueous solution, is investigated using X-ray diffraction analysis. The compound crystallizes in the monoclinic crystal system, space group P2₁/c, a = 13.102(2) Å, b = 6.158(3) Å, c = 11.866(2) Å, β = 98.13(2)°, and Z = 4. The [OsO₂(NH₃)₄]SO₄ · H₂O compound has an island structure. Two crystallographically independent osmium atoms are situated at the centers of symmetry, and their octahedral coordination includes two oxygen atoms and four nitrogen atoms of the ammonia molecules. In both octahedra, the osmyl group is linear. The Os-O distances in the octahedra are identical within the standard deviations [Os(1)-O, 1.762(2) Å; Os(2)-O, 1.769(2) Å]. The Os-N bond lengths vary from 2.082(3) to 2.101(3) Å. The cationic complexes, SO₄ groups, and water molecules are linked via the system of hydrogen bonds. The assignment of the absorption bands in the IR spectrum of the compound synthesized is performed, and its thermal behavior in air is studied.     

Solvothermal Syntheses and Crystal Structures of Rare Earth Thioantimonates [Y(en)<Subscript>4</Subscript>]SbS<Subscript>4</Subscript>·0.5en and [Tm(en)<Subscript>4</Subscript>]SbS<Subscript>4</Subscript>·0.5en

Abstract  

Two rare earth metal thioantimonates [RE(en)₄]SbS₄·0.5en (RE = Y(1), Tm(2); en = ethylenediamine) were synthesized under mild solvothermal conditions. Compounds 1 and 2 are isostructural, and both crystallize in monoclinic space group P2₁/n. Crystallographic data for 1: a = 11.0894(19), b = 12.905(2), c = 16.000(3) ?, β = 91.792(4), V = 2288.7(7) ?³, Z = 4. For 2: a = 11.0870(14), b = 12.8977(16), c = 15.986(2) ?, β = 91.879(3), V = 2284.7(5) ?³, Z = 4. The four-en coordinated rare earth complex cation [RE(en)₄]³⁺ formed in situ balances the charge of the [SbS₄]³⁻ anion in the crystal structure. The RE³⁺ ion is in an eight-coordinated environment involving eight N atoms of four en ligands forming a bicapped trigonal prism. Hydrogen bonds link [RE(en)₄]³⁺, [SbS₄]³⁻ and en species into a three-dimensional structure. The structure determination of 1 and 2 implies that the ionic radii of rare earth metal ions play an important role on the structures of the rare earth metal thioantimonates.     

Synthesis,Structure and Theoretical Research of a New Triaryl Phosphine Complex [HgCl<Subscript>2</Subscript>(PPh<Subscript>2</Subscript>Bz)<Subscript>2</Subscript>] (PPh<Subscript>2</Subscript>Bz = Benzyldiphenylphosphine)

Abstract  The solution-phase reaction of HgCl₂ with benzyldiphenylphosphine (PPh₂Bz) yields a new triaryl phosphine complex [HgCl₂(PPh₂Bz)₂] (1) with the bigger P–Hg–P angle, the longer Hg–Cl bond, and the shorter Hg–P bond. Comparison of the sensitive bond parameters with similar compounds and the theoretical calculation show that the σ-donating abilities of tertiaryl phosphine ligands toward HgCl₂ conforms to the following order: PEt₃ > PPh₂Bz > P(2-thienyl)₃ > dppf > PPh₃. Graphical Abstract  The solution-phase reaction of HgCl₂ with benzyldiphenylphosphine (PPh₂Bz) yields a new triaryl phosphine complex [HgCl₂(PPh₂Bz)₂] (1) with the bigger P–Hg–P angle. Comparison of the sensitive bond parameters with similar compounds shows that the σ-donating abilities of tertiaryl phosphine ligands toward HgCl₂ conforms to the following order: PEt₃ > PPh₂Bz > P(2-thienyl)₃ > dppf > PPh₃.      

Synthesis and Crystal Structure of 2D Supramolecular Compound [Co(phth)(phen) (H<Subscript>2</Subscript>O)<Subscript>3</Subscript>]·H<Subscript>2</Subscript>O

Abstract  

A 2D supramolecular compound [Co(phth)(phen) (H₂O)₃]·H₂O has been synthysized by the reactions of Co(NO₃)₂·6H₂O, 1, 10-phenanthroline(phen) and phthalate acid(H₂phth) in NaOH solution with pH 7.0.The complex has been characterized by elemental analysis, IR, and single-crystal X-ray diffraction analysis which shows it belongs the monoclinic space group P2(1)/n, a = 7.571(2) ?, b = 13.737(3) ?, c = 20.015(4) ?, β = 95.56(1)°. V = 2071.9(8) ?³, Mr = 475.31, Dc = 1.524 g/cm⁻³, Z = 4, F(000) = 980, μ(MoKa) = 0.879 mm⁻¹. The final R1 and wR2 are 0.0348 and 0.0711, respectively. The cobalt(II) ion is six-coordinated in a distorted octahedron to form a unit. Every unit is connected by hydrogen bonds forming 1D chain and 2D supramolecular network by π–π stacking interaction between adjoining chains.     

Synthesis,Crystal Structure and NLO Properties of a Mixed Crystal K<Subscript>1−x</Subscript>(NH<Subscript>4</Subscript>)<Subscript>x</Subscript>H<Subscript>2</Subscript>PO<Subscript>4</Subscript> (x = 0.5)

Abstract  

A new mixed crystal K_1−x(NH₄)_xH₂PO₄ (KADP) of ammonium dihydrogen phosphate (ADP) of ADP–KCl system has been synthesized with x = 0.5 by slow evaporation of the mixture of equimolar aqueous solution at room temperature. Crystal composition determined by single crystal X-ray diffraction analysis reveals that it belongs to the tetragonal system with noncentrosymmetric space group I-42d and it is structurally similar to ADP crystals with the following parameters: a = 7.418(3) ?; c = 7.2284(6) ?; v = 404.63(4) ?³; z = 4. The substitution results in defect centers which influence the physical properties. Mixed crystal has a superior NLO activity, twice that of KH₂PO₄ (KDP), a well known NLO material and the enhanced NLO activity is rationalized. The structural analysis of KADP and the influence of partial cationic substitution in ADP by K⁺ ions on the NLO properties are reported.     

Synthesis and Crystal Structure of a Cyanido-Bridged Bimetallic Copper(II)–Silver(I) Complex of Imidazole and [Ag(CN)<Subscript>2</Subscript>]<Superscript>−</Superscript>: [Cu(Imidazole)<Subscript>4</Subscript>{Ag(CN)<Subscript>2</Subscript>}<Subscript>2</Subscript>]

Abstract  

A cyanido-bridged Cu(II)–Ag(I) bimetallic complex, [Cu(Imidazole)₄{Ag(CN)₂}₂] has been prepared and structurally characterized. The compound crystallizes in the orthorhombic space group Pmna. The crystal structure of the complex consists of trinuclear molecules made up of one [Cu(Imidazole)₄]⁺² and two [Ag(CN)₂]⁻ units. The trinuclear molecules are interlinked to each other through N–H–N and C–H–N hydrogen bonds. The Cu(II) ions are located on mirrors and assume distorted octahedral geometry with the basal plane consisting of four imidazole N-atoms.     

New Diphosphopentamolybdate K<Subscript>5</Subscript>[HP<Subscript>2</Subscript>Mo<Subscript>5</Subscript>O<Subscript>23</Subscript>] · 10H<Subscript>2</Subscript>O: Synthesis,Structure, and Characterization

A new diphosphopentamolybdate(VI) K₅[HP₂Mo₅O₂₃] · 10H₂O has been prepared employing solution method and characterized by single crystal X-ray diffraction, energy dispersive analysis, infrared spectroscopy, thermal stability analysis, cyclic voltammetry analysis, and ultraviolet visible spectroscopy. The compound crystallizes in the orthorhombic sp. gr. Pcab: a = 15.9661(10) Å, b = 19.0832(10) Å, c = 20.0970(9) Å, V = 6123.27(10) Å3, Z = 8. The crystal structure contains the polyanion units [HP₂Mo₅O₂₃]^5– around the potassium cations and lattice water. The [HP₂Mo₅O₂₃]^5– subunits are connected together through K?O?Mo bridges and hydrogen bonds. The crystal shape morphology was simulated using the Bravais–Friedel–Donnay–Harker model.     

Synthesis and Crystal Structure of [Na(H<Subscript>2</Subscript>O)<Subscript>1.5</Subscript>][Na(H<Subscript>2</Subscript>O)<Subscript>3.5</Subscript>] X<Subscript>2</Subscript>·2H<Subscript>2</Subscript>O (X = 4′-Methoxy-7-Hydroxyisoflavone-3′-Sulfonate)

Abstract  

Water-soluble derivative of formononetin, [Na(H₂O)_1.5][Na(H₂O)_3.5] X₂·2H₂O(X = 4′-methoxy-7-hydroxyisoflavone-3′-sulfonate) was synthesized by sulfonation reaction. It was characterized by IR, ¹H NMR and single-crystal X-ray diffraction analysis. Single-crystal X-ray diffraction analysis showed that the title compound crystallized in a triclinic space group P-1 with cell parameters a = 6.9642(15) ?, b = 13.343(3) ?, c = 20.634(5) ?, α = 107.115(3)˚, β = 93.121(4)˚, γ = 91.911(3)˚, V = 1827.3(7) ?⁻³, D _c  = 1.575 Mg m ⁻³, Z = 2. There are two conformers of 4′-methoxy-7-hydroxyisoflavone-3′-sulfonate anions, two kinds of sodium cations, five coordinated water molecules and two lattice water molecules in the crystal structure. The sodium atoms coordinated with the oxygen atoms from water molecules, hydroxyl groups and sulfo-groups to form a Na–O coordinated network. Aromatic π···π stacking interactions and hydrogen bonding existed in the crystal structure of title compound, which together with coordinated interactions and electrostatic interactions between sodium cations and anions sulfonates C₁₆H₁₀O₄SO₃ ⁻ lead to the moieties into a three-dimensional network.     

A Sodium Supported Borate Ester: Synthesis,Spectral Characterization and Crystal Structure of dimeric Sodium Organoborate Complex [Na(py)][B(hyncaH<Subscript>−2</Subscript>)<Subscript>2</Subscript>]<Subscript>2</Subscript>

Abstract  A dimeric sodium supported borate complex, [Na(py)][B(hyncaH₋₂)₂]₂ (1) (py = pyridine, hynca = 1-hydroxynaphthalene-2-carboxylic acid), has been synthesised by the reaction of NaBH₄ with two equivalents of hynca in anhydrous THF and following crystallization from py/H₂O solution afforded borate ester derivative. The complex has been fully characterized by FT-IR in the solid state and by NMR (¹H and ¹³C) spectroscopy and electrospray ionization mass spectrometry in solution. The molecular structure of the title compound was determined by single crystal X-ray diffraction. Structure analysis of complex 1 confirmed the presence of an anionic complex [B(hyncaH₋₂)₂]⁻ in which boron atom is coordinated simultaneously by two hynca ligands utilising both alkoxide and carboxylate groups for bonding. The Na atom is six- coordinate to five O atoms of hydroxy carboxylic acid and one pyridine N atom. Crystal data: crystal system, monoclinic, a = 10.971(3) Å, b = 6.839(3) Å, c = 30.545(5) Å, β = 92.20(2)°, space group P2₁/c (#14), V = 2,290(1) Å³, Z = 4. Index Abstract  There are limited examples of alkali metal supported borate ester complexes.      

The Crystal Structure of {[Pt(9S3)Cl<Subscript>2</Subscript>]<Subscript>2</Subscript>[Pt(9S3)<Subscript>2</Subscript>]}Cl<Subscript>2</Subscript>·4H<Subscript>2</Subscript>O: An Improved Synthesis of [Pt(9S3)Cl<Subscript>2</Subscript>]

Abstract  

We wish to report the crystal structure for a solid-state solution, {[Pt(9S3)Cl₂]₂[Pt(9S3)₂]}Cl₂·4H₂O (1), which contains two different complexes of Pt(II) with the trithiacrown 9S3 (1,4,7-trithiacyclononane). One complex [Pt(9S3)Cl₂] is neutral and contains a Pt(II) center with a single 9S3 ligand and two coordinated chloro ligands. The second Pt(II) complex is a dication and contains two coordinated 9S3 ligands and two non-coordinating chloride anions. There are two crystallographically equivalent [Pt(9S3)Cl₂] complexes present for every single [Pt(9S3)₂]²⁺ cation. Four water solvent molecules are also present. In the neutral complex ([Pt(9S3)Cl₂], the Pt(II) center is surrounded by a cis-[S₂Cl₂ + S₁] ligand environment formed by the two chloro ligands and two of the three sulfur atoms from the 9S3 ligand. These two sulfurs are positioned 2.225(2) and 2.242(2) ? from the Pt(II), but the third sulfur shows a long distance interaction at 3.311(2) ? to form an elongated square pyramidal structure. This axial Pt–S distance is the longest observed in 57 crystal structures of Pt(II) 9S3 complexes. The cation [Pt(9S3)₂]²⁺ displays two centrosymmetrically coordinated 9S3 ligands forming a [S₄ + S₂] environment with an elongated octahedral shape. In the dication, the two equatorial Pt–S distances are 2.297(2) and 2.306(2) ? with the axial sulfur at 3.065(2) ?. The most interesting intermolecular aspects of the structure are hydrogen bonding interactions between two of the water molecules and two chloride counter-ions, resulting in a nearly square O₂Cl₂ ring. This ring shares an edge with a six-membered ring formed by four waters and two chlorides which are hydrogen bonded. The hydrogen bonding interactions, which result from the presence of water in the crystal, appear to be an important component in stabilizing the lattice for the unusual solid-state solution structure. Crystal Data for (1): P2 ₁ /n, a = 7.8327(10) ?, b = 25.152(4) ?, c = 12.382(2) ?, V = 2314.3(6) ?³, Z = 2. We also report an improved synthetic procedure for the preparation of two thiacrown complexes [Pt(9S3)Cl₂] and [Pt(10S3)Cl₂], which are commonly used as precursors for other heteroleptic thioether complexes. The new syntheses proceed at room temperature without the need for long reflux times and produce large crystals which are easily isolable without filtration. The simplicity of these new preparations results in improved yields over previously employed methods.     

Crystal Structure and Physical Characterisation of [Zn<Subscript>2</Subscript>(Benzoato)<Subscript>4</Subscript>(Caffeine)<Subscript>2</Subscript>]·2 Caffeine

Abstract  

The crystal structure of [Zn₂(benzoato)₄(caffeine)₂]·(caffeine)₂ was determined by direct method and Fourier technique. The structure was refined by full-matrix least-squares method to a weighted R factor of 0.0582. The structure consists of centrosymmetric dimeric units where the two zinc(II) atoms are coordinated by four bridging benzoates in a syn–syn arrangement and two caffeine ligands at the apices of a bicapped square prism. Remaining two caffeines are bound only by hydrogen bonds. The Zn–Zn distance is 2.961(1) ?. The Zn(II) atoms are displaced by 0.365 ? from the basal plane containing four oxygen atoms towards the apical caffeine molecules. The dimeric structure of the complex is consistent with spectrum and thermal data. The structural data are compared with those found in similar [Zn₂(RCOO)₄(NL)₂] complexes.     

Synthesis and structure of [(NH<Subscript>2</Subscript>)<Subscript>2</Subscript>CSSC(NH<Subscript>2</Subscript>)<Subscript>2</Subscript>]<Subscript>2</Subscript>[OsBr<Subscript>6</Subscript>]Br<Subscript>2</Subscript> · 3H<Subscript>2</Subscript>O

The complex [(NH₂)₂CSSC(NH₂)₂]₂[OsBr₆]Br₂ · 3H₂O is synthesized by the reaction of K₂OsBr₆ with thiocarbamide in concentrated HBr and characterized using electronic absorption and IR absorption spectroscopy. Its crystal structure is determined by X-ray diffraction. The crystals are orthorhombic, a = 11.730(2) Å, b = 14.052(3) Å, c = 16.994(3) Å, space group Cmcm, and Z = 4. The [OsBr₆]^2? anionic complex has an octahedral structure. The Os-Br distances fall in the range 2.483–2.490 Å. The α,α′-dithiobisformamidinium cation is a product of the oxidation of thiocarbamide. The S-S and C-S distances are 2.016 and 1.784 Å, respectively. The H₂O molecules, Br^?ions, and NH₂ groups of the cation are linked by hydrogen bonds.     

The Synthesis and Crystal Structure of (Hpy)<Subscript>3</Subscript>[PMo<Subscript>12</Subscript>O<Subscript>40</Subscript>]·2(py)

Abstract  

The novel supramolecular networks based on Keggin-type polyoxoanion, formulated (Hpy)₃[PMo₁₂O₄₀]·2(py) has been synthesized hydrothermally and determined by X-ray diffraction. The compound crystallize in Monoclinic, system with space groups and cell parameters, P2 ₁ /n, a = 10.9370(2) ?, b = 19.586(3) ?, c = 12.5500(2) ?, β = 98.618(2)°, V = 2657.8(6) ?³. Organic fragments and Keggin anions are connected via N–H···N, N–H···O contacts to form interesting 1D zigzag chain. The molecule is stabilized in solid state by electrostatic forces and intermolecular hydrogen-bonding interactions to give the confirmation of guest [PMo₁₂O₄₀]³⁻ inserting in organic host.     

Synthesis and crystal structure of [(C<Subscript>7</Subscript>H<Subscript>10</Subscript>N)<Subscript>2</Subscript>]<Superscript>2+</Superscript> [Sb<Subscript>2</Subscript>Cl<Subscript>8</Subscript>]<Superscript>2−1</Superscript>

The reaction of 2,6-dimethylpyridine with SbCl₃ and HCl affords the title compound, the structure of which is ascertained by X-ray diffraction. The unit cell consists of one bridged Sb₂Cl₈²⁻ anion and two 2,6-dimethylpyridinium cations. The trivalent antimony ion is bonded not only directly to chlorine anions, but also is coordinated with chlorine anions by secondary bonds. In the crystal, there exists infinite coordinated chains of [Sb₂Cl₈] _n ²ⁿ⁻ anions running along the a axis, which link 2,6-dimethylpyridinium cations by N-H…Cl hydrogen bonds.     

Synthesis and crystal structure of Na<Subscript>3</Subscript>(H<Subscript>3</Subscript>O)[UO<Subscript>2</Subscript>(SeO<Subscript>3</Subscript>)<Subscript>2</Subscript>]<Subscript>2</Subscript>· H<Subscript>2</Subscript>O

Single crystals of the compound Na₃(H₃O)[UO₂(SeO₃)₂]₂ · H₂O (I) have been synthesized, and their structure has been investigated using X-ray diffraction. Compound I crystallizes in the triclinic system with the unit cell parameters a = 9.543(6)Å, b = 9.602(7)Å, c = 11.742(8)Å, α = 66.693(16)°, β = 84.10(2)°, γ = 63.686(14)°, space group P \(\bar 1\), Z = 2, and R = 0.0734. The uranium-containing structural units of the crystals are [UO₂(SeO₃)₂]^2? chains, which belong to the crystal-chemical group AB ² B ¹¹ (A = UO ₂ ²⁺ , B ² = SeO ₃ ^2? , B ¹¹ = SeO ₃ ^2? ) of the uranyl complexes. The structures of the compounds containing the [UO₂(SeO₃)₂]^2? anionic complexes are compared.     

Synthesis and Crystal Structure of [Te{S(C<Subscript>6</Subscript>H<Subscript>3</Subscript>S)<Subscript>2</Subscript>O}]: A Tetracyclic Tellurium(II) Compound Displaying a Boat–Chair Conformation

Abstract  

The synthesis and molecular structure of (phenoxathiin-4,6-dithiolate)tellurium(II) is described. [Te{S(C₆H₃S)₂O}] was synthesized from the reaction of 4,6-dimercaptophenoxatiin and TeCl₄ in 36% yield. The crystal structure was determined by single crystal X-ray diffraction analysis. Crystal data: [Te{S(C₆H₃S)₂O}], formula weight = 389.95, crystallized in monoclinic system, space group P2(1)/n with a = 7.7898(10) ?, b = 18.513(2) ?, c = 8.9898(11) ?, β = 105.974(2)°, V = 1246.4(3) ?³ and Z = 4. The tetracyclic compound is non-planar with a di-coordinate Te^II atom. The eight-membered central ring is in a boat–chair conformation. The title compound displays weak intermolecular contacts Te–S, S–S and C–H⋯S.