The resonant Raman active mode identified in numerous studies as the heme iron-histidine stretch has been systematically investigated in the Raman spectrum of 15 exogenous ligands to the heme iron in the myoglobin proximal cavity mutant H93G. Mutation of the native histidine 93 of myoglobin to glycine (H93G) creates a cavity at the heme iron that can be filled with exogenous ligands. Substitute...

A synthetic route to C(4/5)-bis(phosphinoyl)imidazole-2-thiones (7d,e) (d: R(1) = (n)Bu, R(2) = Me; e: R(1) = n-dodecyl, R(2) = Me) and C(4/5)-bis(thio/selenophosphinoyl)imidazole-2-thiones (8b,c), (9a,b,e) and 10a (a: R(1) = R(2) = Me; b: R(1) = R(2) = Ph, c: R(1) = (i)Pr, R(2) = Me) is presented that employs initial C(5) lithiation of mono-phosphinoyl/thiophosphinoyl substituted imidazole-2-t...

Since C^C* cyclometalated Pt(II) complexes with N-heterocyclic carbene (NHC) ligands have been identified as potential emitter materials in organic light-emitting devices (OLEDs), very promising results regarding quantum yields, colour and stability have been presented. Herein, we report on four nitrile substituted complexes with a chelating NHC ligand (1-(4-cyanophenyl)-3-isopropyl-1H-benzo[d]...

A potentially dodecadentate N8O4-donor ligand obtained from 2,2'-biimidazole and l-valine and its tetranuclear Cu(ii) complexes in different degrees of protonation were characterized by chemical and spectroscopic methods. The extensive solution studies performed reveal that the rise in pH media leads successively to the formation of imidazolato (pKa(1) and pKa(2) and hydroxido (pKa(3) and pKa(4...

A set of bimetallic complexes based on iridium and rhodium with bis(diphenylphosphino)methane, bis(di-iso-propylphosphino)methane, diphenyl-2-pyridylphosphine 2-(di-iso-propylphosphino)imidazole bridging ligands was prepared. The were characterized by NMR IR spectroscopy studied quantum-chemically using DFT methods. systems succeeded in catalytic hydrodefluorination reactions lower fluorinated ...

The structure of the title compound, [Cd(NCS)(2)(C(5)H(8)N(2))(4)], consists of isolated mol-ecules of [Cd(NCS)(2)(Eim)(4)] (Eim = 1-ethyl-imidazole), which contain a compressed octa-hedral CdN(6) chromophore. The NCS(-) anions are trans and four N atoms from the 1-ethyl-imidazole ligands define the equatorial plane. The mean Cd-N(Eim) and Cd-N(NCS) distances are 2.334 (4) and 2.379 (5) Å, resp...

The structure of the title compound, [Ni(NCS)(2)(C(6)H(8)N(2))(4)], consists of isolated mol-ecules of [Ni(NCS)(2)(Aim)(4)] (Aim = 1-allyl-imidazole), which contain a distorted octa-hedral NiN(6) chromophore. The NCS(-) anions are trans and four N atoms from the 1-allyl-imidazole ligands define the equatorial plane. The mean Mn-N(Aim) and Mn-N(NCS) distances are 2.105 (2) and 2.098 (2) Å, respe...