Bis[bis­(methoxy­carbimido)amine-κ²N,N′]bis­(perchlorato-κO)copper(II) bis­[bis­(methoxy­carbimido)amine-κ²N,N′]bis­(methanol-κO)copper(II) bis­(perchlorate) methanol disolvate

The title compound, [Cu(ClO₄)₂(C₄H₉N₃O₂)₂][Cu(C₄H₉N₃O₂)₂(CH₄O)₂](ClO₄)₂·2CH₃OH, comprises two independent Cu^II species lying on different inversion sites. In the Cu complexes, a distorted octa­hedral geometry arises (from basic square-planar N₄ coordination) from the weak coordination of two perchlorate ions (as Cu—O) in one species and two methanol mol­ecules in the other (also as Cu—O). Inter­actions between the O atoms of the perchlorate anions or methanol groups and the imide or amine NH groups afford an extensive inter­molecular hydrogen-bonding network.

A novel dimeric zinc(II) complex: bis­[μ-1,2-bis­(1H-1,2,4-triazol-1-yl)­ethane-κ²N⁴:N^4′]­bis­[diisothio­cyanato­zinc(II)]

The coordination geometry of the Zn^II atom in the title complex, [Zn₂(NCS)₄(C₆H₈N₆)₂], is that of a distorted tetra­hedron, in which the Zn^II atom is coordinated by four N atoms from the triazole rings of two symmetry-related 1,2-bis­(1,2,4-triazol-1-yl)ethane ligands and two thio­cyanate ligands. Two Zn^II atoms are bridged by two organic ligands to form a dimer. The dimer lies about an inversion center.

A novel two-dimensional nickel(II) coordination polymer with 1,4-bis­(1,2,4-triazol-1-ylmeth­yl)benzene and azide ligands

The coordination geometry of the Ni^II atom in the title complex, poly[diazido­bis[μ-1,4-bis­(1,2,4-triazol-1-ylmethyl)­benzene-κ²N⁴:N^4′]nickel(II)], [Ni(N₃)₂(C₁₂H₁₂N₆)₂]_n, is a distorted octa­hedron, in which the Ni^II atom lies on an inversion centre and is coordinated by four N atoms from the triazole rings of two symmetry-related pairs of 1,4-bis­(1,2,4-triazol-1-ylmeth­yl)benzene (bbtz) ligands and two N atoms from two symmetry-related monodentate azide ligands. The Ni^II atoms are bridged by four bbtz ligands to form a two-dimensional (4,4)-network.

A new tetrathiafulvalene-diamide cation salt with [Cu₂Br₄]^2- anions

The title salt, bis­[2,3-bis­(amino­carbonyl)-8,9-bis­(methyl­sulfanyl)tetra­thia­fulvalenium] di-[mu]-bromido-bis­[bromido­copper(II)], (C₁₀H₁₀N₂O₂S₆)₂[Cu₂Br₄], contains 2,3-bis(aminocarbonyl)-8,9-bis(methylsulfanyl)tetrathiafulvalenium radical cations, [DMT-TTF(CONH₂)₂]^·+, and [Cu₂Br₄]^2- anions. The cations are associated across centres of inversion in a head-to-tail fashion via short face-to-face S...S stacking (TTF moiety). These dimers are further assembled into a one-dimensional chain structure via interdimer double S...S contacts involving the methyl­sulfanyl groups. The one-dimensional chains give rise to a two-dimensional structure through inter­molecular double N-H...O hydrogen bonds involving the amide group. The [Cu₂Br₄]^2- anions, which straddle centres of inversion, are located between the cation layers. Electron paramagnetic resonance measurements show a radical signal, indicating that the two TTF^·+ radicals are not completely coupled in the dimer.

Bis([mu]₄-butane-1,4-dithiol­ato)bis­[hexa­carbonyl­diiron(II)(Fe-Fe)]

The novel title double-butterfly Fe/S cluster complex, [Fe₄(C₄H₈S₂)₂(CO)₁₂], which is structurally similar to the active site of the Fe-only hydrogenases, contains two inversion-related Fe₂S₂(CO)₆ subcluster cores connected by two equivalent butyl chains to afford a 16-membered macrocycle. The formation of the 16-membered macrocycle has an influence on the C-S-Fe angles, while the Fe-Fe and Fe-S bond lengths remain similar to those in related complexes.

[Bis(3,5-dimethyl­pyrazol-1-yl-κN²)­dithio­acetato-κS](triphenyl­phosphine-κP)copper(I)

In the title compound, [Cu(C₁₂H₁₅N₄S₂)(C₁₈H₁₅P)], the copper(I) center is tetra­hedrally coordinated by one S atom and two N atoms from one bis­(3,5-dimethyl­pyrazol-1-yl)­dithio­acetate ligand and one P atom from a triphenyl­phosphine ligand. In the crystal structure, adjacent pyrazole rings are involved in weak π–π inter­actions, thereby forming a one-dimensional zigzag chain running along the b axis.