In what way and when add alumina to our solution of complex in solvent? ( I understood my crystal was acidic with X-ray single crystallograghy and I don't want it. I want a new one with neutral character)
(For organoplatinum and organotin complexes)
The aluminium oxalate [Al(ox)3]3 obtained in the presence of different counter-cations, is stabilized by three chelating organic ligands.With the malonate [Al(mal)2(h-H2O)2], only two molecules are connected to aluminium through the two carboxyl oxygen of the carboxylate group (bidentate mode). The octahedral
coordination is completed by the addition of two terminal water molecules. A similar situation is encountered in two molecular compounds with the derived complexing agent, methylmalonate (CH3CH(COO)2). In one of them,
terminal water molecules are replaced by methanol groups.
Other complexes have been obtained with bis(imino)-diacetate (= ida), bis(methylimino)diacetate orricarboxylates (nitrilotriacetate = nta ) with binary or
tertiary imino groups. Aluminum cation is bonded to both carboxyl oxygen and imino nitrogen atoms. This leads to a tridendate or tetradentate connection of the organicmolecules.
check this article : Article Crystal chemistry of aluminium carboxylates: From molecular ...
Nesa Jafarzadeh The calcination temperature of alumina determines whether it has a surface rich in - OH (basic) or - H (acidic). You can vary the pH of the system in aqueous media to alter the zeta potential and find the point at which the isoelectric point is zero.
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