trans-Carbonyl­chlorido­bis­(tri­ethyl­phosphane-κP)platinum(II) tetra­fluorido­borate

Crystallographic details are given of an unexpected product − a platinum(II) carbonyl complex, in which the carbonyl oxygen atom has remarkably been extracted from Pyrex glassware by tetra­fluoro­ethyl­ene. Preliminary details were reported previously.

Tetra­aqua­dodekakis-μ₂-chlorido-di­iodido-octa­hedro-hexa­niobium(12 Nb—Nb) tetra­hydro­furan octa­solvate

The isolated cluster unit in the structure of [Nb₆Cl₁₂I₂(H₂O)₄]·8THF consists of an {Nb₆} atom octa­hedron coordinated by twelve chlorido, four aqua, and two iodido ligands. THF solvent mol­ecules are bound via O—H⋯O hydrogen bonds.

Bis{[amino­(iminium­yl)meth­yl]urea} tetra­kis­{2-[(di­methyl­amino)(iminium­yl)meth­yl]guanidine} di-μ₆-oxido-tetra-μ₃-oxido-tetra­deca-μ₂-oxido-octa­oxidodeca­vanadium(V) tetra­hydrate

In the crystal structure of the title compound, numerous N—H⋯O and O—H⋯O hydrogen bonds of medium strengths connect metforminium and guanylurea cations and centrosymmetric deca­vanadate(V) anions into a three-dimensional network structure.

Ethyl 2-[4-(4-meth­oxy­benz­yl)-3-methyl-6-oxopyridazin-1-yl]acetate

The inner part of the ester substituent is nearly perpendicular to the di­hydro­pyridazine ring while the ipso carbon of the 4-meth­oxy­phenyl group is close to the above plane. In the crystal, corrugated layers parallel to the ab plane are formed by a combination of C—H⋯O, C—H⋯π(ring) and π-stacking inter­actions.

2,6-Di­bromo-4-methyl­aniline

The mol­ecules of the title compound are linked by weak N—H⋯N hydrogen bonds into [100] chains.

3-Iso­butyl-5,5-di­phenyl­imidazolidine-2,4-dione

The imidazolidine ring is slightly `ruffled' and the isobutyl substituent is rotated well out of the plane of its ring. In the crystal, inversion dimers are formed by pairs of N—H⋯O hydrogen bonds with C—H⋯O hydrogen bonds linking them into chains parallel to (10). The chains are joined into layers parallel to the ac plane by C—H⋯π(ring) inter­actions.

[1,4]Ditellurino[2,3-b:5,6-b′]di­pyrazine

The title compound, C₈H₄N₄Te₂, is the first reported [1,4]tellura[2,3-b:5,6-b′]di­pyrazine. Three independent unit-cell mol­ecules are folded along their Te⋯Te axes, with an average angle φ = 57.9°. C—Te—C angles range from 91.48 (6) to 93.80 (6)°. Inter­molecular N⋯Te bonding inter­actions between tellurium atoms of the central ring and the pyrazine N atoms of adjacent mol­ecules result in a supra­molecular helix motif.