A novel PtII–dibenzo‐18‐crown‐6 (DB18C6) complex

The novel Pt^II–dibenzo‐18‐crown‐6 (DB18C6) title complex, μ‐[tetrakis­(thio­cyanato‐S)­platinum(II)]‐N:N′‐bis{[2,5,8,­15,18,21‐hexa­oxa­tri­cyclo­[20.4.0.1^9,14]­hexa­cosa‐1(22),9(14),10,12,23,25‐hexaene‐κ⁶O]­potassium(I)}, [K(C₂₀H₂₄O₆)]₂[Pt(SCN)₄], has been isolated and characterized by X‐ray diffraction analysis. The structure analysis shows that the complex displays a quasi‐one‐dimensional infinite chain of two [K(DB18C6)]⁺ complex cations and a [Pt(SCN)₄]^2? anion, bridged by K⁺?π interactions between adjacent [K(DB18C6)]⁺ units.     

Potassium di­cyano­argentate(I) 1,4,7,10,13,16‐hexaoxa­cyclo­octadecane

The crystal structure of the title compound, K[Ag(CN)₂]·C₁₂H₂₄O₆, conventionally denoted K(18‐crown‐6)Ag(CN)₂, where 18‐crown‐6 is 1,4,7,10,13,16‐hexa­oxa­cyclo­octa­decane, is characterized by closely packed linear chains formed by the coordination of the nitrile N atoms of the [Ag(CN)₂]⁻ anions to the K⁺ cations. The K atoms lie on centers of inversion and are additionally bound to the six O atoms of the crown ether.     

catena‐Poly[potassium [copper(II)‐μ‐isothiocyanato‐μ‐N‐salicylidene‐β‐alaninato(2–)]]

The title polymeric compound, catena‐poly­[dipotassium [bis­[μ‐N‐salicyl­idene‐β‐alaninato(2−)]‐κ⁴O,N,O′:O′′;κ⁴O′′:O,N,O′‐dicopper(II)]‐di‐μ‐iso­thio­cyanato‐κ²N:S;κ²S:N], {K[Cu(NCS)(C₁₀H₉NO₃)]}_n, consists of [iso­thio­cyanato(N‐salicyl­idene‐β‐alaninato)copper(II)]⁻ anions connected through the two three‐atom thio­cyanate (μ‐NCS) and the two anti,anti‐μ‐­carboxyl­ate bridges into infinite one‐dimensional polymeric anions, with coulombically interacting K⁺ counter‐ions with coordination number 7 constrained between the chains. The Cu^II atoms adopt a distorted tetragonal–bipyramidal coordination, with three donor atoms of the tridentate Schiff base and one N atom of the bridging μ‐NCS ligand in the basal plane. The first axial position is occupied by a thio­cyanate S atom of a symmetry‐related μ‐NCS ligand at an apical distance of 2.9770 (8) Å, and the second position is occupied by an O atom of a bridging carboxyl­ate group from an adjacent coordination unit at a distance of 2.639 (2) Å.     

catena‐Poly­[[[bis(N,N′‐di­phenyl­thio­urea)­cadmium(II)]‐di‐μ‐thio­cyanato] dihydrate]

Bridging by the two thio­cyanato groups in centrosymmetric six‐coordinate bis­(thio­cyanato)­bis­(di­phenyl­thio­urea)­cad­mium(II) dihydrate leads tothe formation of eight‐membered [Cd—SCN→Cd—SCN→] rings that are linked at the metal atom to furnish chains running parallel to the a axis, i.e {[Cd(NCS)₂(C₁₃H₁₂N₂S)₂]·2H₂O}_n.     

(Borohydrido)(18‐crown‐6)potassium and (borohydrido)(dibenzo‐18‐crown‐6)(tetra­hydro­furan)potassium

In the two compounds (borohydrido)(1,4,7,10,13,16‐hexa­oxacyclo­octa­decane‐κ⁶O)potassium, [K(BH₄)(C₁₂H₂₄O₆)], (I), and (borohydrido)(1,4,7,10,13,16‐hexa­oxa‐2,3:11,12‐di­benzo­cyclo­octa­deca‐2,11‐diene‐κ⁶O)(tetra­hydro­furan)­potassium, [K(BH₄)(C₄H₈O)(C₂₀H₂₄O₆)], (II), the K atom is bound to the six O atoms of the crown ether and to a tridentate borohydride group, with further coordination to a tetra­hydro­furan mol­ecule in (II). The alkali metal ion environment is thus distorted hexa­gonal–pyramidal in (I) and bipyramidal in (II).     

Isolated pentaiodide anions in [K(18‐crown‐6)]I5

(1,4,7,10,13,16‐Hexaoxa­cyclo­octa­decane‐κ⁶O)­potassium penta­iodide, [K(C₁₂H₂₄O₆)]I₅, obtained by slow evaporation of an ethanol solution of KI, 18‐crown‐6 and I₂, contains [K(18‐crown‐6)]⁺ cations (C_i symmetry) and I₅⁻ anions (C₂ symmetry), which are arranged in alternating layers parallel to (001). In contrast to the well known tendency of I₅⁻ ions to form chains and nets, the I₅⁻ units in the title compound are isolated.     

2,4,6‐Tri­chloro­phenyl­iso­nitrile and 2,4,6‐tri­chloro­benzo­nitrile

The molecular structures of the title compounds, 2,4,6‐tri­chloro­phenyl­iso­nitrile (IUPAC name: 2,4,6‐tri­chloro­phenyl isocyanide), C₇H₂Cl₃N, and 2,4,6‐tri­chloro­benzo­nitrile, C₇H₂Cl₃N, are normal. The two structures are not isomorphous, but do contain similar two‐dimensional layers in which pairs of mol­ecules are held together by pairs of Cl?CN [3.245 (3) Å] or Cl?NC [3.153 (2) Å] interactions. The two‐dimensional isomorphism is lost through different layer‐stacking modes.     

[N,N‐Bis(2‐hydroxy­ethyl)­di­thio­car­bamato‐S]­bis­(tri­phenyl­phosphine‐P)­copper(I) tri­phenyl­phosphine solvate

In the title compound, [Cu(C₅H₁₀NO₂S₂)(C₁₈H₁₅P)₂]·C₁₈H₁₅P, the Cu atom is in a distorted tetrahedral coordination, with two tri­phenyl­phosphine P atoms and two S atoms from an N,N‐bis(2‐hydroxy­ethyl)­di­thio­carbamate ligand occupying the vertices. The crystal structure is characterized by alternate layers of complex and tri­phenyl­phosphine mol­ecules.     

Chiral and meso‐bis([2.2]­para­cyclo­phan‐4‐yl)­methane and meso‐bis­([2.2]­para­cyclo­phan‐4‐yl) sulfide

The [2.2]­para­cyclo­phane groups of the title compounds, chiral and meso‐bis­(tri­cyclo­[8.2.2.2^4,7]­hexa­deca‐4,6,10,12,13,15‐hexa­en‐5‐yl)­methane (the former as a racemate), C₃₃H₃₂, and meso‐bis­(tri­cyclo­[8.2.2.2^4,7]­hexa­deca‐4,6,10,12,13,15‐hexa­en‐5‐yl) sulfide, C₃₂H₃₀S, show the characteristic structural features of the parent compound [2.2]­para­cyclo­phane and the related compound di­methylbis([2.2]­para­cyclo­phan‐4‐yl)­silane, C₃₄­H₃₆­Si: the aromatic rings are puckered, resulting in a boat conformation. The planes of the four coplanar C atoms are slightly twisted with respect to each other. The Csp³—Csp³ bond lengths of the ethyl­ene bridges are elongated by the electronic and steric effects of the skeleton.     

A novel three‐dimensional cadmium(II) coordination polymer incorporating 1,4‐bis­(1,2,4‐triazol‐1‐ylmethyl)­benzene and thio­cyanate

In the title complex, poly[cadmium(II)‐μ₂‐1,4‐bis­(1,2,4‐triazol‐1‐ylmeth­yl)benzene‐di‐μ₂‐thio­cyanato], [Cd(NCS)₂(C₁₂H₁₂N₆)]_n, the Cd^II atom lies on an inversion centre in a distorted octa­hedral environment. Four N atoms from the thio­cyanate and 1,4‐bis­(1,2,4‐triazol‐1‐ylmeth­yl)benzene (bbtz) ligands occupy the equatorial positions, and two S atoms from symmetry‐related thio­cyanate ligands occupy the axial positions. The benzene ring of the bbtz ligand lies about an inversion centre. Single thio­cyanate bridges link the Cd^II atoms into two‐dimensional sheets containing novel 16‐membered [Cd₄(μ‐NCS‐N:S)₄] rings. The bbtz ligands further link these two‐dimensional sheets into an unprecedented covalent three‐dimensional network for the cadmium–thio­cyanate system.     

A ternary complex of aqua(18‐crown‐6)bis(o‐nitrophenolato)barium(II), the triaqua(18‐crown‐6)(o‐nitrophenolato)barium(II) cation and the o‐nitrophenolate anion

In the title compound [systematic name: tri­aqua(1,4,7,10,13,16‐hexaoxa­cyclo­octa­decane‐κ⁶O)(2‐nitro­phenolato‐κO)­barium(II)–aqua(1,4,7,10,13,16‐hexaoxa­cyclo­octa­decane‐κ⁶O)‐ bis(2‐nitro­phenolato‐κ²O,O′)­barium(II)–2‐nitro­phenolate (1/1/1)], [Ba(C₁₂H₂₄O₆)(C₆H₄NO₃)(H₂O)₃][Ba(C₁₂H₂₄O₆)(C₆H₄NO₃)₂(H₂O)](C₆H₄NO₃), the two Ba^II atoms encapsulated by the 18‐crown‐6 rings have different coordinations. Although both Ba^II atoms are coordinated to the six O atoms of the crowns, in the neutral moiety, the Ba^II atom is coordinated to one terminal O atom from a water mol­ecule, two phenolate O atoms and two nitro‐group O atoms, while in the cationic moiety, the Ba^II atom is coordinated to three terminal O atoms from water mol­ecules and one phenolate O atom. Both the crowns are eclipsed and translated along the b direction. In the asymmetric unit, the three components are interconnected by four O—H?O interactions. The packing is stabilized by two intermolecular C—H?O interactions and by one O—H?O interaction.     

Benzo‐cis‐cyclo­hexano‐14‐crown‐4 and its lithium thio­cyanate complex

The structures of a 14‐crown‐4 ether containing both benzo and cyclo­hexano substituents, 2,6,13,17‐tetraoxatricyclo‐[16.4.0.0^7,12]docosa‐1(18),19,21‐triene, C₁₈H₂₆O₄, and its lith­ium complex, [2,6,13,17‐tetraoxatricyclo[16.4.0.0^7,12]docosa‐1(18),19,21‐triene‐κ⁴O](thio­cyanato‐N)­lith­ium(I), [Li(NCS)‐(C₁₈H₂₆O₄)], are presented. The conformation of the free crown, (I), is not preorganized for cation binding, as its donor dipoles are oriented towards opposite sides of the crown ring. The Li⁺‐crown complex, (II), exhibits two formula units in the asymmetric unit. The binding conformation observed in (II) does not completely reorient the dipoles to one point, resulting in a long Li—O bond length [2.068 (5) and 2.073 (5) Å].     

A novel three‐dimensional copper(II) coordination polymer with 1,4‐bis(1,2,4‐triazol‐1‐ylmeth­yl)benzene and thio­cyanate

In the title complex, poly[copper(II)‐di‐μ₂‐thio­cyanato‐μ₂‐1,4‐bis­(1,2,4‐triazol‐1‐ylmeth­yl)benzene], [Cu(NCS)₂(C₁₂H₁₂N₆)]_n, the Cu^II atom lies on an inversion centre in a tetra­gonally distorted octa­hedral environment. Four N atoms from thio­cyanate and 1,4‐bis­(1,2,4‐triazol‐1‐ylmeth­yl)benzene (bbtz) ligands fill the equatorial positions, and S atoms from symmetry‐related thio­cyanate ligands fill the axial positions. The benzene ring of the bbtz ligand lies about an inversion centre. Single thio­cyanate bridges link the Cu^II atoms into two‐dimensional sheets containing an unprecedented 16‐membered [Cu₄(μ‐NCS‐N:S)₄] ring. The bbtz ligands further link the two‐dimensional sheets into a three‐dimensional network.     

Transition metal complexes with thio­semicarbazide‐based ligands. XV. A square‐pyramidal NiII complex with an asymmetric coordination of 2,6‐di­acetyl­pyridine bis(S‐methyl­iso­thio­semicarbazone)

The title compound, [di­acetyl­pyridine bis(S‐methyl­iso­thio­semicarbazonato)]­iodo­nickel(II), [Ni(C₁₃H₁₈N₇S₂)I], is the first example of a complex involving the ²N coordination of the iso­thio­semicarbazide moiety. 2,6‐Di­acetyl­pyridine bis(S‐methyl­iso­thio­semicarbazone), as a potentially pentadentate ligand (N₅), is coordinated as a tetradentate species, whereby one (deprotonated) iso­thio­semicarbazide moiety is coordinated in the usual way (¹N⁴N), but the other (neutral) is bonded via the ²N atom only, the fourth ligator being the pyridine nitro­gen. The difference in coordination mode of the iso­thio­semicarbazide moiety is reflected in the ¹N—²N bond lengths of 1.359 (4) and 1.379 (3) Å in the deprotonated and undeprotonated moieties, respectively. The structure contains three fused chelate rings in a 5:5:6 arrangement. The six‐membered ring has a non‐planar conformation.     

2‐Iso­propyl‐4‐methyl‐4‐phenyl‐1,2,3,4‐tetra­hydro­iso­quinoline‐1‐thione

The title compound, C₁₉H₂₁NS, is the photoproduct obtained from N‐iso­propyl‐N‐[(E)‐2‐phenyl­propenyl]­thio­benz­amide. Recrystallization showed a spontaneous resolution.     

A pseudosymmetric triclinic modification of tri­phenyl­tin iso­propyl­xanthate

All three independent mol­ecules in the triclinic modification of (O‐iso­propyl di­thio­carbonato‐S)­tri­phenyl­tin, [Sn(C₆H₅)₃(C₄H₇OS₂)], show tetrahedral coordination at their Sn atoms. Bond dimensions involving the Sn atoms are similar to those found in the monoclinic modification of the same compound. Two of the independent mol­ecules are related by a pseudo‐translation allowing a stacking fault that reduces the intensities of h + k odd reflections.     

trans‐Bis­(diethano­lamine)­bis­(iso­thio­cyanato)­nickel(II)

In the neutral title complex, trans‐bis(2,2′‐imino­di­ethanol‐N,O)­bis­(iso­thio­cyanato)­nickel(II), [Ni(NCS)₂(C₄H₁₁NO₂)₂], the iso­thio­cyanate ions and the di­ethanol­amine mol­ecules act as mono­dentate and bi­dentate ligands, respectively. The Ni^II ion exhibits a distorted octahedral configuration with crystallographically imposed inversion symmetry and N_NCS—Ni—N_amine and N_NCS—Ni—O_amine bond angles of 88.78 (10) and 89.44 (10)°, respectively. The Ni—N bond distances are in the range 2.069 (3)–2.096 (2) Å. The mol­ecules are linked by hydrogen bonds to form a three‐dimensional infinite lattice.     

[N,N′‐Bis(3‐aminopropyl)ethylenediamine‐κ4N,N′,N′′,N′′′](trithiocyanurato‐κ2N,S)zinc(II) ethanol solvate

In the crystal structure of the title compound, [N,N′‐bis(3‐­amino­propyl)­ethyl­enedi­amine‐κ⁴N,N′,N′′,N′′′][1,3,5‐triazine‐2,4,6(1H,3H,5H)‐tri­thionato(2−)‐κ²N,S]­zinc(II) ethanol sol­vate, [Zn(C₈H₂₂N₄)₂(C₃HN₃S₃)]·C₂H₆O, the Zn^II atom is octa­hedrally coordinated by four N atoms [Zn—N = 2.104 (2)–2.203 (2) Å] of a tetradentate N‐donor N,N′‐bis(3‐­amino­propyl)­ethyl­enedi­amine (bapen) ligand and by two S and N atoms [Zn—S = 2.5700 (7) Å and Zn—N = 2.313 (2) Å] of a tri­thio­cyanurate(2−) (ttcH²⁻) dianion bonded as a bidentate ligand in a cis configuration. The crystal structure of the compound is stabilized by a network of hydrogen bonds.     

Two furo­pyridine complexes of nickel(II) iso­thio­cyanate

Pyridine fused with a furan ring (fupy), and its di­methyl derivative, have been used for the first time as ligands to synthesize potentially new Werner clathrates. The extended aromatic system of pyridine‐like ligands influences considerably the molecular structure of prepared nickel complexes. The molecular structure of tetrakis­(furo­[3,2‐c]­pyridine)­bis(iso­thio­cyanato)­nickel(II) tetra­hydro­furan (THF) solvate, [Ni(NCS)₂(C₇H₅NO)₄]·C₄H₈O or [Ni(NCS)₂(fupy)₄]·THF, (I), reveals a `four‐blade propeller' arrangement of ligands, with the angles between the fupy planes and the basal octahedron plane spanning the range 38.7–55.3°. These angles are much larger (69.9–78.8°) in the centrosymmetric complex tetrakis(2,3‐di­methyl­furo­[3,2‐c]­pyridine)­bis­(iso­thio­cyanato)nickel(II) 6.6‐hydrate, [Ni(NCS)₂(C₉H₉NO)₄]·6.6H₂O or [Ni(NCS)₂(Me₂fupy)₄]·6.6H₂O, (II), in which crystallographically imposed inversion symmetry is present.     

One‐dimensional polymeric chain structure of bis­(aniline)­di­thio­cyanato­cadmium(II)

In the title compound, catena‐poly­[[bis­(aniline‐N)cadmium(II)]‐di‐μ‐thio­cyanato‐S:N;N:S], [Cd­(SCN)₂­(C₆H₇N)₂], the Cd^II atom lies on an inversion centre and is in a distorted octahedral geometry. The coordination sphere contains two thio­cyanate (SCN) S atoms, two iso­thio­cyanate (NCS) N atoms and two aniline N atoms. The six‐coordinated Cd atoms run parallel to the b axis and are doubly bridged with neighbouring Cd atoms by SCN and NCS ligands. Thus, this complex has a one‐dimensional coordination polymeric chain structure in which the aniline ligand is in the trans conformation.