Cost efficient preparation of lead aminoalkoxides directly from lead(II) oxide

Designed sol–gel precursors for atomically dispersed Nb and Pb within TiO2 as catalysts for dihydroxyacetone transformation

“…While the Nb-O distances are in agreement with the literature, 26 the Nb-N distances are slightly longer in 2a than those found in related 6-coordinated Nb(V) complexes with N-containing ligands. 27 The structure of the solvated compound [Pb(mdea)]•mdeaH 2 (3) reported here is quite similar at the molecular level to the previously described non-solvated [Pb(mdea)], 28 although both crystallize in different space groups (I2/a and C2/c, respectively) and, therefore, have different molecular packings. Similar to the non-solvated [Pb(mdea)], the structure of the compound 3 also corresponds to a polymer based on 5-coordinate lead centers having a trigonally distorted octahedral stereochemistry (if the electron lone pairs are taken into account) (Fig.…”

“…1 7 4 ( 6 ) -2.676(7) Å], Pb-N [2.569(9)-2.763(8) Å] and Pb⋯Pb [3.86-3.91 Å] distances also compare well with the reported structure. 28 While the IR spectra of the new mixed-ligand derivatives 1 and 2 exhibit characteristic bands of the parent ligands, N-methyldiethanolamine and ethoxide, the homoleptic 3 and oxo-derivative 2a show only the bands for the parent aminoalkoxide ligand (Fig. S1 †).…”

Cost efficient synthesis of bismuth aminoalkoxides from bismuth oxide: Molecular structure of [Bi2(mdea)2(mdeaH)2](mdeaH2)2

“…A number of Bi aryloxides have been reported but such compounds are quite prone to reduction and/or a source of C contamination of oxide materials. Alternate, cost efficient synthetic routes based on the reactions between anhydrous or hydrated metal oxides and polyols have been reported for a number of elements such as Si [11],Ti [12], and Pb [13]. Moreover, most reported bismuth alkoxides have a limited shelf life due to their high susceptibility to moisture and/or light.…”

“…The reactivity was similar for the various N-donor polyols deaH 2 $ teaH 3 $ mdeaH 2 and was superior to that of the polyols degH 2 > neol-H 2 without N-donor site. No reaction was observed between Bi 2 O 3 and dimethylaminoethanol Me 2 NC 2 H 4 OH in refluxing toluene even after 4 d. Bismuth oxide appears thus less reactive than lead(II) oxide for synthesis of metal alkoxides directly from the oxide [13]. The triethanoaminolate, [Bi(OCH 2 CH 2 ) 3 N] 1 .…”

How to force a classical chelating ligand to a metal non-chelating bridge: the observation of a rare coordination mode of diethanolamine in the 1D complex {[Cu2(Piv)4(H3tBuDea)](Piv)}n

“…We found only one example of a transition metal complex where the formation of a polymeric structure (1D chain) occurs exceptionally through the diethanolamine ligand, [Pb(MeDea)] n (H 2 MeDea = N-methyldiethanolamine). 3 The formation of a 2D crystal structure based on bridging diethanolamine was observed in [Cd 2 Cu 2 (HDea) 4 Cl 4 ] n •2nH 2 O, with bridging chloride atoms also involved in the polymer formation. 4 In both of these compounds the diethanolamine-based ligands adopt a chelating-bridging mode with participation of all oxygen and nitrogen donor atoms in the polymer construction.…”