metal-organic compounds
Open access
The dinuclear compound, [Nb2Cl6(C2H6S)1.7(C2H6Se)1.3], features an NbIII=NbIII double bond [2.6878 (5) Å]. The molecule lies on a twofold rotation axis that passes through the middle of this bond as well as through the bridging dimethyl sulfide ligand. The NbIII ion exists in an octahedral coordination environment defined by two terminal and two bridging Cl atoms, and (CH3)2Se/(CH3)2S ligands. The (bridging) ligand lying on the twofold rotation axis is an ordered (CH3)2S ligand, whereas the terminal ones on a general position are a mixture of (CH3)2Se and (CH3)2S ligands in a 0.647 (2):0.353 (2) ratio (the methyl C atoms are also disordered).
organic compounds
Open access
The title salt, C20H42N4S22+·2ClO4−, was obtained from the reaction of bis(diethylamino)carbeniumdithiocarboxylate, (Et2N)2C2S2, with Fe(ClO4)2·6H2O in CH2Cl2. The title compound, in which one of the S atoms of (Et2N)2C2S2 is bound to a 1,1-bis(diethylamino)ethane moiety, has two carbenium C atoms, and the charge compensation is provided by two perchlorate anions. The N2C—CS2 bond length is 1.512 (4) Å, corresponding to a C—C single bond, and the dihedral angle between N2C– and –CS2 planes [72.0 (2)°] is smaller than that of (Et2N)2C2S2 [82.0 (1)°]. The crystal structure features C—HS hydrogen bonds.