Diethylenetriamine, inner complexes

Iron-labeled cyclopentadienyl iron complexes, synthesis 54 Tris(3-nitroacetylacetonato)cobalt(III), synthesis 55 Inner complexes of cobalt(III) with diethylenetriamine, synthesis 56... 

Trichloro(tripyridine)chromium(III), synthesis 36 Trichloro (tripyridine) molybdenum (III), synthesis 39 Potassium octacyanotungstate(IV) 2-hydrate, synthesis 40 Chlorine(CH )-labeled thionyl chloride, silicon tetrachloride, boron chloride, germanium(IV) chloride, and phosphorus-(III) chloride, synthesis 44 Unipositive halogen complexes, synthesis 46 Monopyridineiodine(I) chloride, synthesis 47 Tris(3-nitroacetylacetonato)cobalt(III), synthesis 55 Inner complexes of cobalt(III) with diethylenetriamine, synthesis 56... 

Methylbromoarsines, synthesis 26 Vanadium(III) fluoride, synthesis 27 Sulfur(IV) fluoride, synthesis 33 Peroxydisulfuryl difluoride, synthesis 34 Trichloro(tripyridine)chromium(III), synthesis 36 Tris(3-bromoacetylacetonato)chromium(III), synthesis 37 Trichloro(tripyridine)molybdenum(III), synthesis 39 Uranyl chloride 1-hydrate, synthesis 41 Rhenium(III) iodide, synthesis 50 Potassium hexachlororhenate(IV) and potassium hexa-bromorhenate(IV), synthesis 51 Iron-labeled cyclopentadienyl iron complexes, synthesis 54 Inner complexes of cobalt(III) with diethylenetriamine, synthesis 56... 

DTPA and all DTPA-bisamides reported up to now bind Ln3+ ions in a 8-coordi-nate fashion through the three N atoms of the diethylenetriamine backbone and five carboxylate and/or amide O-atoms, both in the solid and in solution. An inspection of crystal structures shows that diethylenetriamine moieties in these complexes always occur either in the XX or in the 88 conformation [ 1,2]. In these conformations, steric interactions are minimized. The coordination sphere is completed by one water molecule or, in some crystal structures, by the O-atom of a neighboring carboxylate group. In a recently reported low temperature (173 K) X-ray structure of K2 [Yb(DTPA)(H20)] second sphere waters were observed adjacent to the carboxylate oxygens [3]. The inner-sphere water is the most important source of the relaxivity of the corresponding Gd3+ complex, but the second sphere water molecules contribute significantly to it as well [3]. 

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