Dihydrogen Phosphate and Hydrogen Sulphate of 1,4-Dimethyl-1,4-diazabicyclo[2.2.2]octane-1,4-diium: Crystal Structures, Hydrogen Bonding and Infrared Spectra

Abstract  

The crystal structures of the title compounds consist of 1,4-dimethyl-1,4-diazabicyclo[2.2.2]octane-1,4-diium cation [C₈H₁₈N₂]²⁺ and [H₂PO₄]⁻ or [HSO₄]⁻ anions. Both crystal structures are monoclinic, the structure of the dihydrogen phosphate (I) is non-centrosymmetric (P2₁) with a = 6.4090(2) ?, b = 13.6920(5) ?, c = 7.6140(3) ?, β = 94.620(2)°, V = 665.97(4) ?³, Z = 2; whereas the unit cell of the hydrogen sulphate (II) is centrosymmetric (P2₁/c) with a = 13.8460(2) ?, b = 12.6610(2) ?, c = 8.0360(2) ?, β = 99.5800(12)°, V = 1389.10(5) ?³, Z = 4. Both the structures are formed by the different bonding patterns of the anions interlinked by strong and moderate O–H···O hydrogen bonds. While the structure of (I) consists of a two-dimensional network of the hydrogen bonded dihydrogen phosphates, the infinite chains of the hydrogen bonded hydrogen sulphates are the basic building unit of the structure (II). In addition to the dominant electrostatic interaction the divalent cations stabilize themselves in the structures by forming several C–H···O hydrogen bonds to the oxygen atoms of the anions. The IR spectra of both the compounds are strongly affected by the hydrogen bonds whose influence on OH stretching vibrations is analysed by means of the DFT calculations in the solid state.     

Synthesis and Crystal Structure of Three New Metal-Organic Frameworks in the Ln(III)/2,6-Pyridinedicarboxylate System

Abstract  

In this paper, three new metal-organic frameworks, synthesized by hydrothermal technique, are described. The compounds crystallize in triclinic space group P − 1 with cell parameters, respectively equal to (1) [La(H₂O)₃(dipic)]₂(C₂O₄) · 2H₂O a = 7.9990(1) ?, b = 8.3380(4) ?, c = 9.6180(5) ?, α = 98.194(5)°, β = 100.438(3)°, γ = 102.437(3)°, (2) [Eu(H₂O)₂(C₂O₄)]₂(dipic) · 3H₂O a = 8.2170(6) ?, b = 10.5900(8) ?, c = 13.0670(3) ?, α = 93.951(3)°, β = 103.393(5)°, γ = 107.797(6)°, and (3) [Ce₃(dipic)₃(Hdipic)(SO₄)(H₂O)₃] · 4H₂O a = 11.655(1) ?, b = 12.886(1) ?, c = 16.139(2) ?, α = 106.369(8)°, β = 92.90(1)°, γ = 115.787(7)°. They differ by their dimensionality mono-dimensional for (1), tri-dimensional for (2) and bi-dimensional for (3).     

Synthesis,Characterization and Fluorescent Property of Two Mixed Ligand Coordination Polymers Constructed from 4-Cyclohexene-1,2-dicarboxylate and Nitrogen-Containing Ligands

Abstract  

Two new coordination polymers [Cd(1,2′-cy)(btx)_0.5H₂O]_n 1 and {[Ni(1,2-cy)(2,2′-bipy)(H₂O)₂]·3H₂O}_n 2 (1,2′-cy=4-cyclohexene-1,2-dicarboxylate, btx=1,4-bis(triazol-1-ylmethyl)benzene, 2,2′-bipy=2,2′-bipyridine) had been synthesized. Their structures were characterized by elemental analysis, IR, TG and X-ray single-crystal diffraction analysis. Crystal data for complex 1: Triclinic, space group P-1, a = 6.4303(13) ?, b = 10.399(2) ?, c = 11.713(2), α = 83.04(3)°, β = 81.87(3)°, γ = 83.84(3)°, and Z = 2. For complex 2: Orthorhombic, space group Pbcn, a = 15.613(3) ?, b = 13.970(3) ?, c = 21.290(4) ?, and Z = 4. Complex 1 exhibits an interesting two-dimensional wavelike covalent layer structure. When Ni salt was replaced by Cd salt, and reacts with 1,2′-cy and 2,2′-bipy, one-dimensional chain-like complex 2 was obtained. Furthermore, the fluorescent property of complex 1 was reported.     

Synthesis,Crystal Structure and Luminescent Property of a Ternary Complex [Cd(sfdb)(3-pytpy)]<Subscript>2</Subscript>·2H<Subscript>2</Subscript>O (H<Subscript>2</Subscript>sfdb = 4,4′-Sulfonyldibenzoic Acid, 3-pytpy = 4′-(3-Pyridyl)-2,2′:6′,2″-Terpyridine)

Abstract  

A new ternary complex [Cd(sfdb)(3-pytpy)]₂·2H₂O (H₂sfdb = 4,4′-Sulfonyldibenzoic acid, 3-pytpy = 4′-(3-pyridyl)-2,2′:6′,2″-terpyridine) 1 has been hydrothermally synthesized and characterized by the elemental analysis, IR spectroscopy and single crystal X-ray diffraction. X-ray diffraction analysis reveals that 1 (C₃₄H₂₄CdN₄O₇S) crystallizes in triclinic space group P-1, features an interesting 1D channel-containing supramolecular structure constructed from grid-like dimers via π–π stacking interactions. Unit cell parameters for 1: a = 8.866(2) ?, b = 11.083(3) ?, c = 15.790(4) ?, α = 103.612(4)°, β = 95.044(3)°, γ = 101.083(4)° and Z = 2. The luminescent spectrum shows the emission peak of complex 1 is at 392 nm which is attributed to the intraligand transition.     

Synthesis,Characterization and X-ray Crystal Structure of the Di-Mannich Base 2,2′-(3aR,7aR/3aS,7aS)-Hexahydro-1<Emphasis Type="Italic">H</Emphasis>-benzo[<Emphasis Type="Italic">d</Emphasis>]imidazole-1,3(2<Emphasis Type="Italic">H</Emphasis>)-diyl)bis(methylene)bis(4-methylphenol)

Abstract  

The crystal structure of new racemic di-Mannich base 2,2′-(3aR,7aR/3aS,7aS)-hexahydro-1H-benzo[d]imidazole-1,3(2H)-diyl)bis(methylene)bis(4-methylphenol) (4), is reported. The structure of the title compound, C₂₃H₃₀N₂O₂, shows two intramolecular O–H···N hydrogen bonding interactions. This compound crystallizes in triclinic symmetry, in space group P−1, with lattice constants: a = 6.2563(3) ?, b = 12.1743(7) ?, c = 14.7257(7) ?, α = 108.11(1)°, β = 99.77(1)°, γ = 98.78(1), V = 1024.97(9) ?³, Z = 2, F(000) = 396, R ₁  = 8.3%, wR ₂  = 14.7%.     

Supramolecular Architecture via Self-Complementary Amide Hydrogen Bonding in [Ag(pia)<Subscript>2</Subscript>](NO<Subscript>3</Subscript>)·H<Subscript>2</Subscript>O: Synthesis,Thermal and Structural Studies

Abstract  

The synthesis, thermal and spectral characterization and crystal structure of silver(I) complex with picolinamide, [Ag(C₆H₆N₂O)₂](NO₃)·H₂O, are reported. The silver(I) atom is chelated by two picolinamide (pia) ligands in approximately square planar geometry. The distortion within the coordination environment is mainly imposed by formation of the chelate rings, but it is also observed in two longer (Ag–O) and two shorter (Ag–N) bond lengths. The compound crystallizes in the triclinic space group P[`1]P\bar{1} with a = 7.1265(2) ?, b = 8.9157(4) ?, c = 12.9527(4) ?, α = 83.934(3)°, β = 86.094(2)°, γ = 67.023(3)° and Z = 2. Cationic complexes are linked through amide–amide hydrogen bonds of ‘head-to-head’ R ₂²(8) motif leading to infinite chains, while nitrate anions and H₂O molecules act only as a cross-link between such four symmetry related cationic chains via hydrogen bonds forming 2D supramolecular double sheets. Therefore, the ‘head-to-head’ amide interactions in [Ag(C₆H₆N₂O)₂](NO₃)·H₂O are robust enough to accommodate the usually disruptive NO₃ ⁻ anion and H₂O molecule and could be regarded as a tool for controlling the assembly of this silver complex.     

An X-ray Crystallographic Study of 1,4-Di[(<Emphasis Type="Italic">E</Emphasis>)-2-(<Emphasis Type="Italic">p</Emphasis>-tolyl)-1-diazenyl]piperazine

Abstract  

The crystal structure of methyl 1,4-di[(E)-2-(p-tolyl)-1-diazenyl]piperazine (4) has been determined by single crystal X-ray diffraction analysis. The bis-triazene (4) adopts a normal chair conformation in the piperazine ring, with puckering parameters : φ₂ = −29(5)°, Q_T = 0.534(2) ? and θ₂ = 177.0(2)°. The crystal structure of 4 is compared with the structure of the triazene (2a) and the closely related bis-triazenes (3 and 5a). The piperazine ring of 2a and 4 adopt a typical chair conformation, whereas the piperazine ring of 3 adopts an unusual pseudo-boat conformation. Crystal data: 4 C₁₈H₂₂N₆, triclinic, space group P[`1] P\overline{1} , a = 6.8925(2) ?, b = 7.8574(3) ?, c = 16.8856(8) ?, α = 103.103(2)°, β = 90.528(2)°, γ = 101.776(2)° and V = 870.44 (6) ?³, for Z = 2.     

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.     

Two-Dimensional Layers Using Different Combinations of Hydrogen Bonded Rings in Three Ammonium Carboxylate Salts

Abstract  

The crystal structure of the ammonium carboxylate salts (cyclohexylammonium)₂·(terephthalate) (1), (cyclohexylammonium)₂·(trans-1,4-cyclohexanedicarboxylate) (2) and (cyclododecylammonium)₂·(trans-1,4-cyclohexanedicarboxylate) (3) were determined by low temperature single crystal X-ray diffraction. The molecular salts were prepared by solution crystallization of the carboxylic acids with the respective amines in a 1:2 stoichiometric ratio. The crystal structure of 1 belongs to the monoclinic space group Cc with a = 11.5643(7) ?, b = 22.8180(13) ?, c = 8.4163(5) ? and β = 117.020(2)°. The crystal structure of 2 belongs to the monoclinic space group P2₁/n with a = 16.9546(10) ?, b = 6.4352(4) ?, c = 19.3948(12) ? and β = 94.677(4)°. The crystal structure of 3 belongs to the monoclinic space group P2₁/c with a = 8.1714(5) ?, b = 34.3887(17) ?, c = 11.0230(6) ? and β = 95.790(4)°. The changes in cation and anion species produces three distinct types of layers, with corresponding changes in the hydrogen bonded ring patterns linking the ionic species together using charge-assisted N⁺–H···O⁻ hydrogen bonds.     

Absence of Platinophilic Interactions in a Series of Tetracyanoplatinates Incorporating Cyclic Amines

Abstract  

Three novel compounds have been synthesized and structurally characterized: [1,10-Hphen]₂Pt(CN)₄·2H₂O (1a) space group P2₁/n, a = 8.73070(17) ?, b = 15.4609(2) ?, c = 9.82661(19) ?, β = 103.252(2)°; [2,2′-Hbipy]₂Pt(CN)₄·2H₂O (1b) space group P2₁/n, a = 7.0859(14) ?, b = 12.940(2) ?, c = 13.7486(19) ?, β = 100.708(16)°; K₂[Pt(CN)₄]·2phen (phen = 1,10-phenanthroline) (2) space group P2₁/c, a = 8.1393(4) ?, b = 20.4050(9) ?, c = 8.4085(4) ?, β = 105.284°. All three structures contain isolated [Pt(CN)₄]²⁻ ions and they all illustrate the absence of Pt⋯Pt interactions due to the presence of bulky cyclic amines or ammoniums. The structures of 1a and 1b contain large organic cations, 2,2′-bipyridinium and 1,10-phenanthrolinium, respectively while compound 2 contains neutral 1,10-phenanthroline molecules co-crystallized between the potassium tetracyanoplatinate framework.     

Synthesis, Crystal Structure and Characterization of a New Dabcodiium Hexaaquacobalt(II) Bis(Selenate), (C6H14N2)[Co(H2O)6](SeO4)2

Abstract  

The new hybrid material, cobalt selenate templated by 1,4-diazabicyclo[2.2.2]octane (abbreviated dabco), has been synthesised by the slow evaporation method at room temperature. Its crystal structure was investigated using single crystal X-ray diffraction data. It crystallises in the monoclinic system (space group P2₁/c) with the following unit-cell parameters: a = 12.9169(2) ?, b = 11.9101(2) ?, c = 12.4951(2) ?, β = 108.484(1)°, V = 1823.10(5) ?³ and Z = 4. The supramolecular structure of (C₆H₁₄N₂)[Co(H₂O)₆](SeO₄)₂ consists of isolated [Co(H₂O)]²⁺ and (C₆H₁₄N₂)²⁺ cations and (SeO₄)²⁻ anions linked together by three dimensional hydrogen-bond network. The infrared spectroscopy confirmed the presence of these different entities. The thermal behaviour of the precursor, studied by thermodiffractometry and thermogravimetric analyses, indicates that its decomposition proceeds through three stages giving rise to the cobalt oxide.     

Structure of Diaqua 1,10-Phenanthroline Cobalt (II) 2,5-Pyridinedicarboxylate Monohydrate

Abstract  

The coordination complex namely diaqua 1,10-phenanthroline cobalt (II) 2,5-pyridine dicarboxylate monohydrate that is formulated as [Co(H₂O)₂(PHEN)(PDC)] H₂O, (PHEN is the abbreviation of 1,10-phenanthroline and PDC is the abbreviation of 2,5-pyridinedicarboxylate), has been hydrothermally synthesized and characterized via single crystal X-ray diffraction techniques. This compound is monoclinic, space group P21/c, with Z = 4 in a unit cell with dimensions a = 11.7840(5) ?, b = 7.5298(3) ?, c = 21.5238(9) ?, β = 93.124(3)°. The structure contains one crystallographic unique Co atom, two coordinate water molecules, one PHEN species, one PDC fragment and one lattice water molecule. Extensive water O–H···O hydrogen bonding interaction among the adjacent discrete molecules leads to a two dimensional framework. This structure represents the first of cobalt compound in the system of PDC and PHEN that has been reported.     

Crystal Structure,Conformation and Vibrational Analysis of a Mannich Base: 2-[(phenylamino) methyl]-isoindole-1,3-dione

Abstract  

The crystal structure of 2-[(phenylamino) methyl]-isoindole-1,3-dione, C₁₅H₁₂N₂O₂, crystallizes in the triclinic space group Pī with cell parameters of a = 7.1176 (2) ?, b = 8.5533 (3) ?, c = 10.9163 (4) ?, α = 95.937 (2)°, β = 102.975 (2)°, γ = 108.474 (2)°, V = 603.18 (4) ?³ and Z = 2. This indole derivative is a Mannich base in which a methyl group bridges the molecules of phthalimide and aniline molecules. The dihedral angle between the phthalimide and aniline is 75.47 (3)°. The molecules of the title compound forms a centrosymmetric hydrogen-bonded dimer through a pair of N–H···O hydrogen bonds. C–H···π and an extensive π···π interactions, in addition, stabilize the molecular structure. The compound presented here is V-shaped, the angle at the methyl bridge [N–C–N] being 115.04 (12)°. Present study reports the conformation and hydrogen bonding interactions which play an important role in biological functions. Vibration analysis complement the structure analysed.     

Synthesis and Crystal Structure of an Iodobismuthate Incorporating Both a Cationic and Anionic Bi (III) Complex Ion

Abstract  

A new iodobismuthate of formula [BiI₂(terpy)₂][BiI₄(terpy)] (terpy = 2,2′:6′,2′′-terpyridine), was prepared solvothermally in an ethanolic mixture composed of bismuth (III) iodide, terpy, and ruthenium (III) iodide. The compound crystallizes in the space group P [`1] \bar{1} , with Z = 2, a = 9.8491(4) ?, b = 15.4181(7) ?, c = 17.5323(8) ?, α = 89.8140(10)°, β = 80.4160(10)°, γ = 77.9020(10)°. Single-crystal X-ray analysis reveals that the compound is composed of a [BiI₂(terpy)₂]⁺ cation and a [BiI₄(terpy)]⁻ anion. It is an uncommon example where an iodobismuthate cation and anion are simultaneously incorporated into the same crystal structure.     

Characterization of Molecular Complexes of 1,4-Naphthoquinone Derivatives

Abstract  

The structures of sulphur atom tethered quinone containing flexible carboxylic acid (3-methyl-1,4-dioxo-1,4-dihydronaphthalen-2-ylsulfanyl)acetic acid (1) and its molecular complex with 4,4′-bipyridine (3) are determined. The compound 1 crystallizes in P-1 (triclinic, a = 7.5378(6) ?, b = 7.6413(7) ?, c = 10.3101(9) ?; α = 89.779 (7)°, β = 81.042 (5)°, γ = 89.101(7)°) and the molecular complex 3 crystallises in P2(1)/n (monoclinic, a = 9.3383(7) ?, b = 3.970(3) ?, c = 42.130(3) ?, β = 91.056(5)°) space groups, respectively. The R₂²(8) type hydrogen bonding between dicarboxylic acid groups present in the parent compound 1 is lost on interaction with 4, 4′-bipyridine; in the molecular complex 3 R₂²(7) type of O···H–C and O–H···N interactions are present between the pyridine rings and carboxylic acid groups. The molecular complex (4) derived from 3-carboxymethylsulfanyl-1,4-dihydroxynaphthalen-2-yl-sulfanyl) acetic acid (2) with triphenylphosphine oxide in 1:2 ratio, crystallises in C2/c space group have monoclinic, a = 26.0494(13) ?, b = 10.5402(5) ?, c = 17.1023(8) ?, β = 108.719 (5)°). The triphenylphosphine oxide molecules are preferentially held by O–H···O interactions between carboxylic acid and P=O bond.     

3D Metal–Organic Framework Based on Cadmium Complex of Pyrazine-2,3,5,6-tetracarboxylic Acid

Abstract  

The 3D metal–organic framework based on cadmium complex of pyrazine-2,3,5,6-tetracarboxylate (pztc⁴⁻), {Cd₂(pztc)(H₂O)₂}_n, has been synthesized by the reaction of H₄pztc and Cd(NO₃)₂·4H₂O under hydrothermal conditions and characterized by elemental analysis, IR, single-crystal X-ray diffraction and fluorescence measurement. This complex belongs to triclinic system, P[`1] P\overline{1} space group with a = 5.0080(10) ?, b = 6.6578(13) ?, c = 8.5790(17) ?, α = 89.28(3)°, β = 75.76(3)°, γ = 78.80(3)°. All the donor N and O atoms in pztc⁴⁻ coordinate to Cd(II) ions. As decadentate ligand, each pztc⁴⁻ links eight Cd(II) atoms, which is a novel coordination mode of pztc⁴⁻.     

Hydrogen-bonded Three-dimensional Supramolecular Network Constructed by Dinuclear Ni(II) Macrocyclic Complex and 1,2,4,5-Benzenetetracarboxylate

Abstract  

A new coordination polymer [Ni₂(L)(H₂btec)]_n, (1) was obtained from the reaction of NiSO₄·6H₂O, macrocyclic ligand 3,6,9,17,20,23-hexaaza-29,30-dihydroxy-13,27-di-tert-butyl-tricyclo[23,3,1,1^11,15]triaconta-1(28),11,13,15(30),25,26-hexaene (H₂L), and 1,2,4,5-benzenetetracarboxylic acid (H₄btec) in methanol. Its structure was determined by X-ray diffraction analysis. The crystal is monoclinic C2/c space group with cell parameters a = 20.4923(3) ?, b = 14.2389(3) ?, c = 14.5130(2) ?, β = 97.441(2)°, V = 4199.05(12) ?³, and Z = 8. The X-ray analysis shows that each Ni (II) cation is six-coordinated by an O₃N₃ donor set. The macrocyclic complex [Ni₂L] ²⁺ are bridged by H₂btec²⁻ anions to form 1D chains, which are further joined via N–H···O hydrogen bonds to yield a 3D supramolecular structure. Thermogravimetric analysis (TGA) for the complex is discussed.     

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.     

Novel Assembly of a Cyanide-Bridged Copper(II)–Nickel(II) Binuclear Complex with a Copper(II) Macrocyclic Ligand

Abstract  

A mononuclear fragment [Cu(L)Cl]ClO₄ (1) and a cyano-bridged Cu^II–Ni^II binuclear complex [CuL][Ni(CN)₄]·0.25H₂O (2) (L = 1,3,6,8,11,14-hexaazatricyclo[12.2.1.18,11]-octadecane), have been prepared and characterized. X-ray single crystal analyses indicate that the both complexes crystallize in the monoclinic crystalline system. The complex of 1 in P1n1 space group with unit cell constants a = 6.1176(6) ?, b = 11.9147(10) ?, c = 12.2041(12) ?, β = 98.816(5)° and 2 in the P2₁/n space group with unit cell constants a = 8.1419(13) ?, b = 14.695(2) ?, c = 16.863(3) ?, β = 98.375(2)° have been revealed. The complex 2 assumes a binuclear structure in which the nickel(II) ion is in a square planar environment and the copper(II) is in a square-prism geometry environment.     

Synthesis and Crystal Structure of 2,4-Diiodo-6-[(2-morpholin-4-yl-ethylimino)-methyl]-phenolato-zinc(II)

Abstract  

One new complex, 2,4-Diiodo-6-[(2-morpholin-4-yl-ethylimino)- methyl]- phenolato-zinc(II) has been designed and synthesized. The structure was determined by UV, IR and single X-ray crystallography study. The title complex C₂₆H₃₀O₄N₄I₄Zn crystallizes in the triclinic space group P − 1 with the cell parameters a = 9.938(2) ?, b = 11.937(2) ?, c = 14.527(3) ?, α = 87.14(3)°, β = 79.03(3)°, γ = 76.20(3)°, V = 1565.1(5) ?³ and Z = 2. The central zinc(II) is four coordinate and bonds to two nitrogen atoms and two oxygen atoms from two 3,5-diiodosalicylaldehyde-2- morpholinoethylamine Schiff bases. The complex is linked into a column by weak intermolecular interactions.