trans‐Bis(hinokitiolato)copper(II) trans‐bis(hinokitiolato)palladium(II) cocrystals with (5/1) and (3/2) formulations

trans‐Bis(3‐isopropyl‐7‐oxocyclohepta‐1,3,5‐trien‐1‐olato)copper(II) trans‐bis(3‐isopropyl‐7‐oxocyclohepta‐1,3,5‐trien‐1‐olato)palladium(II) as the (5/1) and (3/2) composites [Cu(C₁₀H₁₁O₂)₂]·0.2[Pd(C₁₀H₁₁O₂)₂] and [Cu(C₁₀H₁₁O₂)₂]·0.67[Pd(C₁₀H₁₁O₂)₂], respectively, where 3‐isopropyl‐7‐oxocyclohepta‐1,3,5‐trien‐1‐olate is the systematic name for the hinokitiolate anion (hino), are the first mixed‐metal cocrystalline products isolated from the M_x(hino)_y family of complexes. These cocrystals contain square‐planar trans‐Cu(hino)₂ and trans‐Pd(hino)₂ molecules possessing crystallographic inversion symmetry. The bulk formulation for these cocrystalline compounds is Cu_1−xPd_x(hino)₂, where x is 0.166 (4) for the (5/1) product and 0.399 (4) for the (3/2) product. This bulk formulation is simply a convenient average expression of the whole‐molecule substitutional disorder present in these compounds. The M—O bonds are in the range 1.9210 (11)–1.9453 (10) Å, the O—M—O bite angles are in the range 82.94 (4)–83.36 (4)°, and all of the hinokitiolate O atoms are involved in C—H...O hydrogen‐bonding interactions.     

Diastereoselective Pomeranz–Fritsch–Bobbitt synthesis of (S)-(−)-O-methylbharatamine using (S)-N-tert-butanesulfinimine as a substrate

The protoberberine-type alkaloid, (S)-(−)-O-methylbharatamine, has been synthesized in six steps involving the addition of laterally lithiated o-toluamide to (S)-N-tert-butanesulfinimine as the crucial process. The target alkaloid was obtained in 24.4% overall yield with 88% ee.     

Bis­(cyano­guanidine)silver(I) nitrate–cyanoguanidine (1/1)

In the title compound, [Ag(C₂H₄N₄)₂](NO₃)·C₂H₄N₄, the Ag atom is surrounded by three cyano­guanidine (cnge) mol­ecules. Two monodentate cnge mol­ecules form strong covalent Ag—N bonds of 2.210 (7) and 2.266 (6) Å through their nitrile N atoms. The third cnge mol­ecule is located in a vacant crystal site and is only weakly coordinated to the Ag atom as a solvate molecule. Inter‐ and intramolecular hydrogen bonds play an important role in the crystal packing.     

Isoamyl­cobalamin–acetone–water (1/0.385/12.650)

The title compound, [Co(C₅H₁₁)(C₆₂H₈₈N₁₃O₁₄P)]·0.385C₃H₆O·12.650H₂O, contains the isoamyl (3‐methyl­butyl) anion bonded to the Co^III ion through a C atom. The compound is thus a structural analog of the two biologically important vitamin B₁₂ coenzymes adenosyl­cobalamin and methyl­cobalamin. The lower axial Co—N bond length [2.277 (2) Å] is one of the longest ever reported for a cobalamin and reflects the strong σ‐donor ability of the isoamyl group.