title: Preparation of d-(-)trans-1,2-diaminocyclohexane-N,N,N'N'-tetra-acetic acid and its use as a spectropolarimetric reagent for lead.
abstract: d-(-)-trans-1,2-diaminocyclohexane-N, N, N', N' -tetraacetic acid [d(-)DCTA] was prepared stereospecifically in good yield by the condensation of the resolved diamine, d-(-)-trans-1,2-diaminocyclohexane, with sodium chloroacetate at 16 degrees , followed by use of a strong cation-exchanger to obtain the free acid. Distinct differences were noted in the infrared spectra of the optically active acid and the racemate. The molecular rotation of d(-)DCTA showed strong dependence on the pH of the solution. D(-)DCTA was used as a stereospecific chelometric reagent in the spectropolarimetrically monitored determination of lead.
authors.affiliation: Department of Chemistry, Texas A & M University, College Station, Texas 77843, U.S.A.
authors.forename: P E
authors.initials: PE
authors.lastname: Reinbold
authors.forename: K H
authors.initials: KH
authors.lastname: Pearson