The Click-to-Chelate approach is a highly efficient strategy for the radiolabeling of molecules of medicinal interest with technetium and rhenium-tricarbonyl cores. Reaction of azide-functionalized molecules with alkyne prochelators by the Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC; click reaction) enables the simultaneous synthesis and conjugation of tridentate chelating systems for the...

z l.5 Time-consuming 13C N M R measurements o f sparingly soluble ring-substituted cyclopentadienyl metal complexes can be avoided if INEPT techniques are applied. In particular, polarization transfer based on long range 13C -'H couplings (V (13C 1H); n = 2, 3) can be used to observe 13C N M R signals o f quaternary ,3C nuclei, which are difficult to observe in normal 13C N M R spectra. The imp...

2014 Mössbauer spectroscopy is applied to the study of dynamical properties of adsorbed monolayers with special attention to changes in resonant absorption cross section caused by diffusion along the surface. Specific systems studied were films of butadiene iron tricarbonyl on exfoliated graphite (Papyex) at several coverages, from 130 K to room temperature. The absorption spectra of the Fe57 c...

Concerns have been raised regarding environmental manganese exposure since high exposures have been associated with neurological disorders. The USA Environmental Protection Agency most recent human health risk assessment of inhaled manganese conducted in 1993 identified specific areas of uncertainty regarding manganese pharmacokinetics. This led to the development of a test rule under the USA C...

In the title compound, [Mo(C(37)H(53)N(3))(CO)(3)], the Mo atom to ring-centroid distance in the η(6)-coordinated tricarbonyl-molybdenum group is 1.958 (1) Å. The three C O groups are pseudo-octa-hedrally disposed with C-Mo-C angles ranging from 80.7 (1) to 87.4 (1)°. The two uncoordinated 2,6-diisopropyl-phenyl-substituted benzene rings form dihedral angles of 75.96 (8) and 78.01 (9)° with the...

Bonding in the bis(pentalene)dititanium "double-sandwich" species Ti2Pn2 (Pn = C8H6) and its interaction with other fragments have been investigated by density functional calculations and fragment analysis. Ti2Pn2 with C2v symmetry has two metal-metal bonds and a low-lying metal-based empty orbital, all three frontier orbitals having a1 symmetry. The latter may be regarded as being derived by s...

Dispersive wave turbulence is studied numerically for a class of one-dimensional nonlinear wave equations. Both deterministic and random (white noise in time) forcings are studied. Four distinct stable spectra are observed-the direct and inverse cascades of weak turbulence (WT) theory, thermal equilibrium, and a fourth spectrum (MMT; Majda, McLaughlin, Tabak). Each spectrum can describe long-ti...

Titanocene derivatives with an interannular ethylene bridge, while resem· bling their unbridged counterparts in many transformations involving Ti or TillI oxidation stages, do not follow reaction paths previously observed for unbridged titanocene in a number of reactions, such as formation of a TiII dinitrogen complex, isotope exchange of the cyclopentadienyl riIig ligands with D 2, or formatio...