New Bisaqua Picolinate-Based Gadolinium Complexes as MRI Contrast Agents with Substantial High-Field Relaxivities
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A Rh-103, P-31 and C-13 NMR study of [Rh-4(CO)(6)(mu-PPh2)(4)] in CD2Cl2 indicates that the strongly bonded, bridging, anionic ligand PPh2- takes part in the site exchange of the carbonyl ligands and is actually mobile about the metallic surface of this cl ...
The reaction of pyrrole-2,5-dicarbaldehyde (1) with o-phenylenediamine (2) in anhyd. EtOH afforded a [1+1]-condensation product, viz., Schiff's base. The structure of the latter was established by NMR spectroscopy and x-ray diffraction anal. The reaction o ...
he structure and dynamics of the surrounding water were studied through molecular dynamics (MD) simulations for several GdIII polyaminocarboxylate and polyaminophosphonate complexes in aqueous solution. The radial distribution functions (rdf) show that a f ...
The effect of hydration on the mobility of polysaccharides in onion cell-wall material (CWM) was studied by solid-state NMR. The application of proton T-1 rho, carbon T-1 relaxation measurements, and 2D-WISE (wideline separation) experiments led to a coher ...
The molecular complex [Re(equivalent toC(t)Bu)(=(CHBu)-Bu-t)((CH2Bu)-Bu-t)2] (1) reacts with a silica partially dehydroxylated at 700 degreesC to give syn-2, [(equivalent toSiO)Re(equivalent toC(t)Bu)(=(CHBu)-Bu-t)((CH2Bu)-Bu-t)], as a single isomer accord ...
The synthesis of the potentially nonadentate ligand 1,4,7-tris[(6-carboxypyridin-2-yl)methyl]-1,4,7-triazacyclononane (H3tpatcn), a new derivative of 1,4,7-triazacyclononane N-functionalised with three pyridinecarboxylate arms, is described. The complexes ...
High-resoln. 13C NMR spectra of terminally monodeuterated alkali metal and alk. earth metal allyl compds. confirm earlier structure assignments: allylmagnesium bromide exists in a s-covalent structure, which rapidly and reversibly goes over into its metall ...
We determined the structure of the hydrated Cu(II) complex by both neutron diffraction and first-principles molecular dynamics, In contrast with the generally accepted picture, which assumes an octahedrally solvated Cu(II) ion, our experimental and theoret ...
American Association for the Advancement of Science2001
Recent neutron-diffraction studies on dilute solutions have shown that a change in coordination numbers from nine to eight water molecules in the first hydration sphere occurs when going from the light to the heavy lanthanide (III) ions. To acquire a deepe ...
