Iridium Complexes with BIAN-Type Ligands: Synthesis, Structure and Redox Chemistry.

A series of iridium complexes with bis(diisopropylphenyl)iminoacenaphtene (dpp-bian) ligands, [Ir(cod)(dpp-bian)Cl] (), [Ir(cod)(NO)(dpp-bian)](BF) () and [Ir(cod)(dpp-bian)](BF) (), were prepared and characterized by spectroscopic techniques, elemental analysis, X-ray diffraction analysis and cyclic voltammetry (CV). The structures of - feature a square planar backbone consisting of two C = C π-bonds of 1,5-cyclooctadiene (cod) and two nitrogen atoms of dpp-bian supplemented with a chloride ion (for ) or a NO group (for ) to complete a square-pyramidal geometry. In the nitrosyl complex , the Ir-N-O group has a bent geometry (the angle is 125°).

Effects of Bis(imino)acenaphthene (Bian)-Derived Ligands on the Cytotoxicity, DNA Interactions, and Redox Activity of Palladium(II) Bipyridine Complexes.

A series of heteroleptic bipyridine Pd(II) complexes based on 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-Bian) or 1,2-bis[(2,4,6-trimethylphenyl)imino]acenaphthene (tmp-Bian) were prepared. All complexes were fully characterized by spectrochemical methods, and their crystal structures were confirmed by X-ray diffraction analysis. The 72 h stability of heteroleptic bipyridine Pd(II) complexes with Bian ligands under physiological conditions was investigated using H NMR spectroscopy.

Trapping of Ag into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry.

Self-assembly of (BuN)[β-MoO], AgNO, and 2-bis[(2,6-diisopropylphenyl)-imino]acenaphthene (dpp-bian) in DMF solution resulted in the (BuN)[β-{Ag(dpp-bian)}MoO] () complex. The complex was characterized by single crystal X-ray diffraction (SCXRD), X-ray powder diffraction (XRPD), diffuse reflectance (DR), infrared spectroscopy (IR), and elemental analysis. Comprehensive SCXRD studies of the crystal structure show the presence of Ag in an uncommon coordination environment without a clear preference for Ag-N over Ag-O bonding.

Niobium and Tantalum Halocyanide Clusters: The Complete Family.

Synthetic procedures providing straightforward access to the whole family of Nb and Ta halide clusters with terminal cyanide ligands have been developed. Corresponding [MX(CN)] (M = Nb, Ta; X = Cl, Br) can be accessed by ligand-exchange procedures from KNbX (X = Cl, Br) and BuNCN, (EtN)[TaCl] and BuNCN and from [TaBr(HO)Br]·4HO and KCN in moderate to high yields (50-80%). The products were isolated as BuN salts.