Role of the H3O2 bridging ligand in coordination chemistry. 1. Structure of hydroxoaquametal ions

Abstract

and activation energies (0.03 eV), although the interplanar spacing for the Ge material is ~0.3 Á shorter than that of the Ga analogue.

Oxygen-exchange pathways in aluminum polyoxocations

“…Ϫ are well documented for doubly bridged hydroxo dimers of metals (see Springborg, 1988;Ardon and Bino, 1985) where they dramatically affect the stability of the dimer and the Brønsted acid-base properties. It seems likely that similar bridges will be observed on mineral surfaces.…”

Supramolecular Frameworks Based on Rhenium Clusters Using the Synthons Approach

“…This synthon involves H bonds classified by Desiraju as strong bonds [ 57 ]. H 3 O 2 − anions can be seen as bridging ligands in which the O-O bond length is very short and varies between 2.44 and 2.56 A [ 58 , 59 , 60 , 61 ]. The H 3 O 2 − ligand is formed from one water ligand that may hydrolyze to a hydroxo ligand, leading to a strong H bond between the hydroxo ligand of one ion and an aquo ligand of another ion [ 60 , 61 ].…”

“…H 3 O 2 − anions can be seen as bridging ligands in which the O-O bond length is very short and varies between 2.44 and 2.56 A [ 58 , 59 , 60 , 61 ]. The H 3 O 2 − ligand is formed from one water ligand that may hydrolyze to a hydroxo ligand, leading to a strong H bond between the hydroxo ligand of one ion and an aquo ligand of another ion [ 60 , 61 ]. The first example of a µ-H 3 O 2 − bridging ligand in a MOF material has been reported by Monge et al [ 62 ].…”

Mechanism of the MeOH/H2O Substitution in a Series of Biomimetic Bimetallo Zinc‐Based H3O2 Complexes

“…This is not surprising because H 3 O 2 – anions are quite stable in the gas phase2 and can even be crystallised as isolated H 3 O 2 – anions in the solid state 3. In the meantime, small inorganic complexes containing such H 3 O 2 linkages have been reported for most of the first‐row transition‐metal ions (V,4 Cr,5,6 Fe,7 Co,6,8 Ni,9,10 Cu10 and Zn11), as well as for Mo,12 W12 and Ru 13. In several cases, F. Meyer et al have shown that it is possible to selectively obtain the μ‐OH or the M–H 3 O 2 –M form by fine‐tuning the ligand environment 9b,14.…”