Synthesis, Characterization, and Stability of Dealkylated Salen-Supported Aluminum Phosphates.

Three salen aluminum bromide compounds salen(Bu)AlBr () (salen = ,'-ethylenebis(3,5-di--butylsalicylideneimine)), salpen(Bu)AlBr () (salpen = ,'-propylenebis(3,5-di--butylsalicylideneimine)), and salophen(Bu)AlBr () (salophen = ,'--phenylenenebis(3,5-di--butylsalicylideneimine) were evaluated for their potential use as dealkylation agents with a series of organophosphates. These reactions led to the aluminum phosphate compounds containing six-coordinate aluminum centers and hydrolytically stable P-O-C bonds: = [salen(Bu)AlOP(O)(OMe)], = [salen(Bu)AlOP(O)(OEt)], = [salen(Bu)AlOP(O)(OPh)], = [salophen(Bu)AlOP(O)(OMe)], = [salpen(Bu)AlOP(O)(OPr)], = (salen(Bu)AlO)PO, = (salpen(Bu)AlO)PO, = (salophen(Bu)AlO)PO. All the compounds were characterized by H, C, Al, and P NMR, IR, and mass spectrometry.

Removal of selenite from water using a synthetic dithiolate: an experimental and quantum chemical investigation.

Combination of the dithiol N,N'-bis(2-mercaptoethyl)isophthalamide, abbreviated as BDTH2 and as 1, with excess H2SeO3 in aqueous acidic (pH ≈ 1) conditions resulted in precipitation of BDT(S-Se-S) (6), with a (77)Se NMR chemical shift of δ = 675 ppm, and oxidized BDT. When the reaction is conducted under basic conditions Se(IV) is reduced to red Se(0) and oxidized 1. No reaction takes place between 1 and selenate (Se(VI)) under acidic or basic conditions.